121 results about "Surface plasmon wave" patented technology

Optical plasmon-wave attenuator and modulator structures for controlling the amount of coupling between an guided optical signal and a surface plasmon wave. Optical power coupled to the plasmon wave mode is dissipated in varying amounts producing an intensity modulation effect on the optical signal. For electrical modulation, an additional dielectric (or polymer) layer with variable refractive index in optical contact with a metal layer supporting at least one plasmon wave mode is used to perturb or vary the propagation constant of plasmon wave. Propagation constant variation results in the power coupling variation between the surface plasmon wave and the optical wave. The refractive index variation of the dielectric (or polymer) layer can be accomplished via an electro-optic traveling-wave, a lump-element, or any other integrated optics modulator configuration situated to affect the layer, thereby permitting data rates into tens of GHz. Because of the extremely small interaction lengths needed, the optical plasmon-wave modulator is a very compact device which can be implemented on the top of a fiber or as an integrated optical planar structure.

The invention discloses a waveguide structure based on an artificial surface plasmon device. The waveguide structure comprises a dielectric layer, a first metal sheet and a second metal sheet, the first metal sheet and the second metal sheet are oppositely and fixedly connected on two sides of the dielectric layer, periodically arranged grooves are formed in the first metal sheet and the second metal sheet respectively, the depths of the grooves positioned in the middles of the metal sheets are equal, and the depths of the grooves positioned in two ends of each metal sheet are gradually increased from the end to the middle respectively until the depths are equal to the depths of the grooves positioned in the middles of the metal sheets. Novel artificial surface plasmon units are specifically arranged to form the waveguide structure, a curved surface arch circuit is conveniently manufactured, and the waveguide structure has a high practical value. The invention further provides an amplifier of the waveguide structure based on the artificial surface plasmon device, and the amplifier can amplify an artificial surface plasmon wave in a wide frequency band.

The invention discloses a patch array capable of realizing wide angle frequency scanning by employing planar surface plasmon feed. The metal structure comprises coplanar waveguide transmission line feed parts (1) arranged at the two ends, transition parts (2) from coplanar waveguide transmission lines to surface plasmon waveguides, a surface plasmon waveguide part (3) and a round metal patch array (4), wherein the surface plasmon waveguide part (3) is arranged in the middle, the two transition parts (2) are arranged at the two sides of the surface plasmon waveguide part (3), the two coplanar waveguide transmission line feed parts (1) are arranged at two outer sides of the transition parts (2), and the round metal patch array (4) is arranged on the upper part the surface plasmon waveguide part (3). With the structure disclosed by the invention, wide-angle scanning of a beam from the rear side to the front side in a wideband range can be achieved.

A robust multichannel SPR instrument with exceptionally high sensitivity (<pg / mm2). The instrument utilizes an SPR detection scheme providing multiple reflections from a planar light guide configuration to amplify the reflected light intensity changes near the resonance angle. This SPR approach is amenable to simultaneous multichannel detection while maintaining high sensitivity with a simple, cost-effective design. The idea of using multiple reflections to excite multiple surface plasmon waves seems counterintuitive at first because the SPR resonance will be broadened; the broadened resonance will diminish sensitivity for angle or wavelength detection modes. However, changes in reflected light intensity near the resonance angle will be amplified by the multiple reflections, thereby increasing the sensitivity of SPR utilizing intensity detection at a fixed angle of incidence.

The invention discloses a device for realizing conversion between space waves and artificial terahertz surface plasmon polariton (SPP) waves. The device comprises a medium substrate and two metal sheets fixedly connected to media to form a mirror-image relation. The metal sheets are provided with grooves arranged periodically. The depths of the grooves gradually increase from the two ends to the middle parts of the metal sheets and keep constant after being increased to a specific value. The widths of the grooves are equal. A gap is formed between one end of one metal sheet and one end of the other metal sheet. The gap is widened from the rear end to the front end in an exponential form until the width of the gap exceeds the width of each metal sheet. The device can realize effective conversion between the terahertz space waves and the SPP waves within a wide frequency range and a large angle range on the basis of novel artificial electromagnetic materials, and has the advantages of being small in size, low in weight, capable of being bent and the like, thereby having good application prospect in terahertz functional devices.

The invention discloses a maximally tilted fiber bragg grating SPR (Surface Plasmon Resonance) biochemical sensor and a manufacture method of the maximally tilted fiber bragg grating SPR biochemical sensor. The maximally tilted fiber bragg grating SPR biochemical sensor comprises an optical fiber core and an optical fiber cladding layer wrapping the optical fiber core. The maximally tilted fiber bragg grating SPR biochemical sensor is characterized in that: a first tilted fiber Bragg grating is arranged at the front section of the optical fiber core and is used as a polarizer of the maximally tilted fiber bragg grating SPR biochemical sensor; an included angle of a tilted grating stripe and an optical fiber longitudinal axis of the first tilted fiber Bragg grating is 45 degrees; a second tilted fiber Bragg grating is arranged at the middle section of the optical fiber core, and an included angle of a tilted grating stripe and an optical fiber longitudinal axis of the second tilted fiber Bragg grating is 79-84 degrees; and a metal film layer or a gold nanoparticle layer is coated on the outer surface of the second tilted fiber Bragg grating as a surface plasmon wave carrier. According to the maximally tilted fiber bragg grating SPR biochemical sensor, the maximally tilted fiber bragg grating is adopted to excite surface plasmon waves to measure biomolecules or chemical components, and the maximally tilted fiber bragg grating SPR biochemical sensor can be widely applied to the fields such as biology, chemical engineering, medical science, bioscience and the like.

Disclosed in the invention is a surface plasmon waveguide comprising a metal substrate and at least two metal walls. The at least two metal walls arranged on the substrate are parallel to each other. A groove is formed between the metal walls, so that the surface plasmon can be transmitted at the metal substrate surface at the bottom of the groove along the extending direction of the groove. According to the invention, because of the metal walls at the surface of the metal substrate, an electromagnetic filed with transverse locality can be formed in the groove between the metal walls from the metal wall to the metal wall, thereby limiting transmission of the surface plasmon to the outside of the metal walls. Therefore, the surface plasmon only can be transmitted along the interfaces of the metal substrate and the dielectric layer between the two metal walls at the direction parallel to the metal walls. Because the metal walls play a good role in limiting the surface plasmon in the waveguides, the crosstalk between waveguides can be avoided even though the interval between the two waveguides is small. With the surface plasmon waveguide, small-radius large-angle turning transmission of the surface plasmon as well as application to an optical beam splitter can be realized.

The invention discloses a microwave vortex wave generator based on artificial surface plasmon. The microwave vortex wave generator works in a microwave frequency band, double layers of artificial surface plasmon waveguides achieve transmission of electromagnetic waves, and the waveguides on the upper layer are connected to the waveguides on the lower layer through a metal through hole. The radiation part of the microwave vortex wave generator is mainly achieved through a series of circular patches which are placed beside the artificial surface plasmon waveguides, and meanwhile the circular patches also provide phases needed for generating different vortex waves as resonators. The microwave vortex wave generator can have different vortex waves with different orbit angular momentum modes at different frequency positions without making any changes in structure.

The invention discloses a fiber-optic gyroscope resonant cavity chip based on a tunable surface plasmon coupler. The chip comprises a first embedded polarization maintaining optical fiber and a second polarization maintaining optical fiber, which are used to conduct optical signals and stabilize the polarization state of the optical signals; an embedded curved polarization maintaining optical fiber; and a tunable surface plasmon coupler, which is used to adjust the coupling ratio of resonant cavity and realize single-polarization transmission of optical singles in the resonant cavity. The embedded curved polarization maintaining optical fiber and the tunable surface plasmon coupler form a resonant cavity; and the tunable surface plasmon coupler is a surface plasmon waveguide coupler. The first embedded polarization maintaining optical fiber, the second embedded polarization maintaining optical fiber, and the embedded curved polarization maintaining optical fiber are embedded in the peripheral layer of the tunable surface plasmon coupler and butt-jointed with the tunable surface plasmon coupler. The polarization maintaining optical fibers and the tunable surface plasmon coupler are integrated in a same chip, and the whole solid state of chip is realized, so the resonant cavity is more stable compared with conventional resonant cavity of fiber-optic gyroscope, and polarization noise is eliminated.

The invention provides a method for improving extraction efficiency of an organic electroluminescent (EL) device. By adopting the inherent surface plasmon waves of devices with metal electrodes as media, a surface plasmon tunnel energy resonating with the light emitting exciton is formed by adjusting parameters of the device, namely, changing the dielectric constant and thickness of materials on each layer. Introduce the energy of light emitting exciton to the tunnel, and then release the energy in the tunnel through micro-nano structure of the device, thus avoiding light energy waste caused by consumption of light energy resulted from useless waveguide mode and other modes and improving the extraction efficiency of the device. The invention also provides an organic EL device working according to the principle. Transmission of various colors of lights from blue to red can be realized by adjusting parameters of the device, thus replacing the practice of arranging a color filter in front of a white light source in traditional organic EL display technology.

An apparatus and a method for measuring gap width, displacement shift or relative position between two subjects using surface plasmon resonance (SPR) are disclosed. First, a TM mode light beam is provided, so as to generate SPR on a surface of one of the two subjects. Then, the signal of the reflective light or penetrative light on the surface is measured. Because SPR is sensitive to the changes of the gap, displacement shift or relative position when the width of the gap is equal to or smaller than twice the penetration length of the surface plasmon wave, the gap, displacement shift and relative position can be acquired by sensing changes of the signal. Accordingly, the width of the gap, displacement shift, relative position and surface roughness smaller than twice the penetration length or even less than 10 nm can be measured.

The invention discloses a metal cavity-based surface plasmon laser. The metal cavity-based surface plasmon laser comprises a surface plasmon waveguide and a metal cavity. The metal cavity is embeddedinto the surface plasmon waveguide by an etching technology and serves as a resonant cavity of a laser, so that the shape and the size of the metal cavity can be precisely controlled. The reflectivityof a cavity mirror of the metal cavity to a surface plasmon mode in the cavity is higher than 90%, so that the Q value of the surface plasmon laser in the metal cavity is as high as 1170. The surfaceplasmon laser uses the metal cavity as the resonant cavity for the laser, and has the advantages of a small physical size, a large quality factor, capability of precisely controlling the shape and the size, a simple and mature preparation technology, room-temperature working, compatibility with an electronic chip and the like.

The invention relates to a substrate integrated spoof surface plasmon polariton (SSPP) waveguide, and relates to a plasmon polariton waveguide. The substrate integrated SSPP waveguide is provided witha substrate integrated waveguide and metal slots disposed on the substrate integrated waveguide. The metal slots are periodic metal slots and are distributed on a single side of the substrate integrated waveguide or on double sides of the substrate integrated waveguide symmetrically, anti-symmetrically, and offset-symmetrically to transmit microwaves and terahertz SSPPs with extremely strong local field-binding properties. The substrate integrated SSPP waveguide has a band-pass characteristic, and relatively sharp rising and falling edges, and can adjust the pass-band range by changing the effective lengths of the slots and the widths of the substrate integrated waveguide. Through scale transformation, enlargement and reduction units, and branch structure size, the substrate integrated SSPP waveguide can be used for the transmission of SSPP electromagnetic waves in microwave, millimeter wave or terahertz bands.

The invention relates to an optical fiber probe and in particular relates to a bisymmetric PCF-SPR (Photonic Crystal Fiber based Surface Plasmon Resonance) probe capable of working under a high-refractivity solution environment. A central air hole is formed in a cladding layer of a photonic crystal optical fiber; eight outer-layer small air holes and outer-layer large air holes, which are crosslyarrayed in an octagonal shape, are formed in the periphery of the central air hole; a silver-graphene composite film is plated on an outer wall of the cladding layer. When light is emitted into the two photonic crystal optical fibers, the light with different wavelengths are transmitted in the optical fibers by adopting a specific mode along the axis center direction and surface plasmon waves aretransmitted in the silver-graphene composite film by adopting a fixed mode. When the light with the certain wavelength in the optical fibers is the same as a wave vector of the surface plasmon waves in the silver-graphene composite film, energy coupling occurs in the silver-graphene composite film and the light in the optical fibers can be coupled into the silver-graphene composite film so that light energy in the optical fibers is reduced. The light wavelength corresponding to maximum energy consumption is resonance wavelength.

The invention discloses a grooved annular structure sensor based on microstrip line excitation. The grooved annular structure sensor based on microstrip line excitation comprises a grooved metal annular structure, a first dielectric layer, a second dielectric layer and an earth plate from bottom to top. The grooved metal annular structure comprises an annular grooved metal strip. Multiple grooves evenly distributed in the circumferential direction are etched in the annular grooved metal strip. A microstrip line is arranged between the first dielectric layer and the second dielectric layer. The microstrip line is formed by combining a short metal patch with a disc branch knot structure at the tail end of the metal patch. The microstrip line can efficiently excite artificial surface plasmon waves on the grooved metal annular structure. Compared with a traditional microwave sensor, the defect that a traditional resonant type sensor can only complete measurement at a certain specific frequency point is overcome, multiple resonant modes can be easily generated in a wide frequency band, the space resolution is high, and the sensor is very sensitive to the change of surrounding medium parameters and can achieve broadband high-sensitivity sensing.

The invention discloses a phase gradient super-surface based surface plasmon planar antenna. The planar antenna adopts the phase gradient super-surface as a radiation surface; the received electromagnetic wave is converted into a surface plasmon wave propagating along the surface; the surface plasmon wave propagating along the surface is converted into a radiation electromagnetic wave; a waveguide, microstrip lines, a substrate integrated waveguide, and strip lines are used as a feed structure for exciting and receiving the surface plasmon wave; the radiation surface is manufactured by a one-dimensional or two-dimensional phase gradient super-surface flat plate; the flat plate is manufactured by a microwave base plate; a metal unit structural array with different geometrical parameters is etched periodically in one surface of the microwave base plate, that is plated with metals on two surfaces, for realizing the phase gradient of 360 degrees; and the metal layer on the other surface of the microwave base plate is totally kept. The surface plasmon planar antenna has the advantages of the flat plate shape, the thin layer, the detachable structure, co-plane focusing, high yield and the like.

There is disclosed a waveguide structure that propagates surface plasmon waves, comprising: a quantum well structure, disposed on a semiconductor substrate; wherein the quantum well structure has a quantum well layer, in turn having an intersecting region that intersects a hypothetical plane substantially orthogonal to an alignment direction of the quantum well structure with respect to the semiconductor substrate, and a real part of a dielectric constant of the quantum well structure is negative for THz waves of a predetermined wavelength.

The invention discloses a band-stop filter based on artificial surface plasmons. The structure works in a microwave frequency range, and a metal structure is only adhered to the upper layer of a medium. The band-stop filter is fed by conventional coplanar waveguides, and transition structures between the coplanar waveguides and artificial surface plasmon waveguides are utilized to realize impedance matching and wave number matching between the two kinds of waveguides. According to the invention, two unit structures of double-edge wrinkling strip line artificial surface plasmon waveguides are used to form a new unit structure, a certain distance interval of periodic arrangement is formed between every two new unit structures, and a new artificial surface plasmon transmission line is formed. The transmission line is characterized in that, capacitance structures are introduced into the conventional double-edge wrinkling strip line transmission line, and a stop band can be introduced into the frequency band of the artificial surface plasmons, so that the function of the band-stop filter is realized.

The invention discloses a filtering array antenna and a manufacturing method thereof. The filtering array antenna comprises a dielectric substrate, wherein a coplanar waveguide structure, an impedancematching structure, an all-pass converter structure and an antenna radiation structure are arranged on an upper surface of the dielectric substrate and are sequentially connected, and a microstrip structure is arranged on a lower surface of the dielectric substrate. With the arrangement of the coplanar waveguide structure, the impedance matching structure, the all-pass converter structure, the antenna radiation structure and the microstrip structure, and the coplanar waveguide structure has an effect of a high-pass filter; the coplanar waveguide structure and the microstrip structure form twobalance-unbalanced converter, and conversion of coplanar waveguide and microstrip is completed; the impedance matching structure is used for performing impedance matching; and the all-pass converterstructure can be used for converting a signal in a quasi-TEM wave form to a signal in a surface plasmon wave form, so that the antenna radiation structure has higher emission efficiency, and moreover,the structure is simple and compact and has relatively small volume. The filtering array antenna is widely applied to the technical field of wireless communication.

A high-resolution microscopic three-dimensional imaging device is characterized by the following steps: first determine the incident light, then select a suitable hemispherical prism, select a slide glass and vapor-deposit a layer of metal on its surface, and place it on the hemispherical plane of the hemispherical prism , put the object on the metal layer, let the incident light be incident on a point on the prism hemispherical surface along the radial direction of the prism, the angle between the incident light and the plane of the glass slide is θ, and the light beam will produce total reflection on the surface of the slide, TM The wave generates surface plasma waves on the metal surface through total reflection, and the TE wave is reflected. A λ / 4 wave plate and a mirror are placed on the reflected light path outside the hemispherical prism; the detector is placed above the object to detect and record Detection results; by changing the incident surface and the included angle θ, illuminating the object at different positions and recording the detection results, and considering all the detection results comprehensively, the complete three-dimensional information of the detected object can be obtained; this method can effectively use the lighting light, the device is flexible, and the imaging resolution is high.

The invention relates to a mode-controllable vector vortex light beam generation device and a mode-controllable vector vortex light beam generation method, belongs to the technical field of vortex light beam generation and solves a problem that vector vortex light beams in different modes cannot be accurately generated in the prior art. The device comprises an electromagnetic wave transmitting device, an electromagnetic wave receiving device, a controller, adjustable Archimedes spiral metal particles, an artificial surface plasmon waveguide and a dielectric substrate, wherein the artificial surface plasmon waveguide is arranged above the dielectric substrate, an input end of the artificial surface plasmon waveguide is connected with an output end of the electromagnetic wave transmitting device, and the output end is connected with an input end of the electromagnetic wave receiving device, the controller is used for adjusting the shape and the position of the Archimedes spiral metal particles, and the adjustable Archimedes spiral metal particles are symmetrically arranged on two sides of the artificial surface plasmon waveguide. The device is advantaged in that the vector vortex light beams with the topological charge to be debugged can be generated, and the device is simple, easy to implement and low in cost and has outstanding technical advantages.

The invention belongs to the technical field of a microwave integrated circuit and device, and discloses a complementary trapezoid groove-based method for achieving an odd-mode artificial surface plasma guided wave. The dispersion characteristic of a complementary trapezoid groove structure is analyzed by an intrinsic mode method, artificial surface plasmon naturally existing in an optical frequency band is simulated, the artificial surface plasmon guided wave which has a high binding effect at a microwave frequency band and can support odd-mode transmission is designed by building an odd-modesimulated microstrip transition structure, full-wave electromagnetic simulation is performed, and an odd-mode and high-efficiency transmission effect of the artificial surface plasmon at the microwave frequency band is verified. The odd-mode artificial surface plasmon guided wave has the characteristics of high transmission efficiency, thin thickness, light mass and the like and is easy to process and has wide application prospect in the field of a novel microwave integrated circuit and device.

There is disclosed a waveguide structure that propagates surface plasmon waves, comprising: a quantum well structure, disposed on a semiconductor substrate; wherein the quantum well structure has a quantum well layer, in turn having an intersecting region that intersects a hypothetical plane substantially orthogonal to an alignment direction of the quantum well structure with respect to the semiconductor substrate, and a real part of a dielectric constant of the quantum well structure is negative for THz waves of a predetermined wavelength.

The invention discloses a surface plasmon wave separator based on a composite cycle and a single cycle. The surface plasmon wave separator comprises a funnel-shaped grating structure which is printed on a flexible medium. The grating structure comprises two composite-cycle straight-metal grating structures which are opposite in position and parallel, two single-cycle arc-metal grating structures which are opposite in position and two single-cycle straight-metal grating structures which are opposite in position and forms a certain field angle. A row of deep grooves A and a row of shallow grooves B are formed in a staggered mode in the inner sides of the composite-cycle straight-metal grating structures. A row of deep grooves A are formed in the inner sides of a group of coterminous single-cycle arc-metal grating structure and single-cycle straight-metal grating structure. A row of shallow grooves B are formed in the inner sides of a group of coterminous single-cycle arc-metal grating structure and single-cycle straight-metal grating structure. According to the surface plasmon wave separator based on the composite cycle and the single cycle, the plasmon wave separator of an ultrathin flexible thin film based on the composite cycle structure and the single cycle structure is achieved at the first time in a microwave section. The surface plasmon wave separator based on the composite cycle and the single cycle has the advantages of being high in wave separating efficiency, simple in structure and convenient to manufacture.

The invention belongs to the technical field of electromagnetic specific medium metasurfaces, and particularly relates to a chiral dependent surface plasmon polariton wavefront modulator under circular polarized light incidence. A coupling regulator is composed of an excitation region and two intrinsic regions which are spliced at the left side and the right side of the excitation region and are of the same structure. For circular polarized light, the modulator can achieve the regulation and control on SPP wavefront chirality dependence while achieving the SPP high-efficiency coupling; for a condition that the circular polarized light is in a left-handed rotation state, the modulator achieves the point focusing regulation and control on the SPP wave surface; for a condition that the circular polarized light is in a right-handed rotation state, the modulator achieves the beam deflection regulation and control on the SPP wave surface; wherein a primitive cell is of a metal microstructure / dielectric medium / metal substrate sandwich structure, and the intrinsic region is of a dielectric medium / metal substrate structure. The modulator provided by the invention has the advantages of simple structure, function integration, ultra-high efficiency, independent and adjustable wavefront and the like, and has huge application potential for near-field regulation based on a chip.

The present invention proposes a design method of an ultra-transmissive waveguide based on polarization resonance and Bragg resonance, and applies the ultra-transmissive waveguide to a surface plasmon waveguide system in which the basic unit consists of nano-scale metal-dielectric-metal waveguides and cyclically aligned laterally coupled resonators. Thus, the chain resonator structure has guide wave and band gap characteristics similar to that of photonic crystals. In the excitation of the single-ended waveguide mode, the waveguide mode is coupled with the lateral coupling resonance mode to modulate the transmission characteristics. In particular, the operating frequency of the waveguide structure can be controlled by the intrinsic frequency of the lateral resonator. The waveguide as a whole can achieve filtering, transmission and super transmission to form a laser state. In addition, the design method utilizes the gain and loss of the resonator to modulate the waveguide transmission characteristics. The design method gives the dispersion relation of the super transmission waveguide based on the coupling mode theory and the Bragg theory, combined with the polarization resonance and the Bragg resonance interaction.

The invention provides an electric control structure and an electric control method for implementation of surface plasmon polariton photon modulation. The method for implementation of surface plasmon polariton photon modulation includes: making a semiconductor heterojunction and forming two-dimensional electron gas under the surface of the semiconductor heterojunction; preparing a metal nano wire on the surface of the semiconductor heterojunction to use the metal nano wire as a surface plasmon polariton waveguide; making a metal electrode close to the metal nano wire for controlling quantum dot properties, wherein the metal electrode forms quantum dot luminophor in the two-dimensional electron gas after being powered; and adjusting voltage of the metal electrode to control the control quantum dot properties.

The invention discloses a surface plasmon waveguide tunable optical filter. The surface plasmon waveguide tunable optical filter mainly comprises a metal film and a plurality of slit structure units formed in the metal film; the horizontal rectangular slit in the plurality of slit structure units is formed at the one third of the lower end of the metal film; the longitudinal rectangular slit in the plurality of slit structure units is formed at the upper end of the middle of the horizontal rectangular slit and is perpendicular to the horizontal rectangular slit; the disk slit in the pluralityof slit structure units is formed at the upper end of the longitudinal rectangular slit, and the center point of the disk slit and the center point of the longitudinal rectangular slit are on the samevertical axis; two identical isosceles triangles are embedded in the disk slit; the vertical angles of the isosceles triangles are connected with each other, and the bottom edges of the isosceles triangles are parallel to each other, so that a bowknot-shaped metal rod can be formed; the joint of the vertical angles of the isosceles triangles is the center of the disk slit; and all the slit structure units penetrate the upper surface and lower surface of the metal film and form an integrated slit structure. The structure of the filter of the invention has a tunable property and high transmittance in a near-infrared band; the full width at half maximum of the transmission spectrum and frequency-selection position of the filter can be achieved by changing the relevant parameters of the structure; and therefore, the surface plasmon waveguide tunable optical filter has the advantages of wide application range, high utilization and easiness in integration.

The invention discloses a calibration method and device for an error of an included angle between a ccd target face and a mounting and positioning face based on leaked radiation imaging. The device comprises an illuminating light source, a to-be-detected fluorescent material, a metal layer-containing chip substrate, refractive index matching oil, a microobjective, a reflector, a polarization element group, an optical filter, a bunching lens, a horizontal slide rail, an imaging lens and a ccd image sensor. A fluorescent sample irradiated by illuminating light generates a fluorescent surface plasmon wave and leaks radiation through the metal layer-containing chip substrate, and fluorescent imaging is achieved after a signal is collected through the microobjective. In the period, the excitinglight sent by the illuminating light source is filtered by the polarization element group and the optical filter. By moving the position of the imaging lens, the target face of the ccd image sensor is detected by means of leaked radiation Hough transform algorithm, so that the error of the included angle, which is hardly found, between the ccd target face and the mounting and positioning face bymeans of a conventional means is calibrated precisely. The device is simple in structure and high in applicability.