42 results about "Dipole mode" patented technology

RF-optical metamaterials with (±∈, ±μ) figures-of-merit of interest are constructed from coupled magnetic and dielectric multi-resonant multi-disks (finite-size cylinders) or multi-sphere lattices arranged in a periodic or a random fashion to offer tailored magnetic and electric dipole moments. The present metamaterials include embedded particles arrays that provide coupled magnetic and electronic modes equivalent to L (inductor) and C (capacitor) circuit models. Novel arrangements of these dipole modes (L and C) tailor the transfer function to the physics of interest.

The invention discloses a topological bulk laser based on an energy band inversion light field limiting effect and a method, being characterized in that a topological state photonic crystal which generates a dipole mode and a quadrupole mode near the center of a Brillouin zone and generates energy band reversing and a topological moderate state photonic crystal which does not generate energy bandreversing are adopted; the spliced boundary can generate reflection and limitation effects of a light field, and the boundary encircles to form a closed curve, so that a laser resonant cavity is formed in the boundary. According to the topological bulk laser based on an energy band inversion light field limiting effect and the method, single-mode vertical laser emission with high directivity, lowthreshold, narrow linewidth and high side-mode rejection ratio can be realized; the process difficulty and the preparation cost are reduced; the problems of heat dissipation and electric injection areimproved; the stability of components is improved, and the service life is prolonged; after copying to an electric injection active material system, the topological bulk laser based on an energy bandinversion light field limiting effect can obtain the vertical emitting laser with controllable size, high directivity, low threshold, narrow linewidth and high side mode rejection ratio; and the topological bulk laser based on an energy band inversion light field limiting effect can be applied to the fields of optical communication, solid-state lighting, laser radar, substance detection, medicaldiagnosis and the like.

An antenna and multi-antenna system are provided. Each antenna of the system is a mirror image and comprises first and second conductive elements each having a first end and a second end portion, the second end portions being capacitively coupled to each other. Each antenna can be operated as a lower-frequency folded dipole having a series capacitive gap which facilitates electrical lengthening of the antenna, or as a higher-frequency monopole antenna having a parasitic element which facilitates improved bandwidth. The antennas' feedpoints may be placed at opposite corners of a ground plane, and separated by a distance which is less than one quarter of an operating wavelength of the dipole but greater than one quarter of an operating wavelength of the monopole. Locating the feedpoints at the ground plane corners facilitates orthogonal polarization of the two antennas at least in dipole mode. The antennas thus provided exhibit good isolation.

A method and system for beam deflection. The method and system for beam deflection comprises a compact superconducting RF cavity further comprising a waveguide comprising an open ended resonator volume configured to operate as a trapped dipole mode; a plurality of cells configured to provide a high operating gradient; at least two pairs of protrusions configured for lowering surface electric and magnetic fields; and a main power coupler positioned to optimize necessary coupling for an operating mode and damping lower dipole modes simultaneously.

The invention discloses a surface-enhanced infrared substrate based on a metamaterial and a molecular detection method thereof. The infrared substrate is sequentially provided with a supporting substrate, a uniform surface plasmon thin film and a periodic array; by regulating the period of the periodic array, the infrared The uniform surface plasmon thin film of the substrate is coupled with the electric dipole mode, so that the resonance wavelength of the latter changes, and the near-field electric field strength is enhanced; when the molecules to be measured are adsorbed or prepared on the infrared substrate, through the external infrared The spectroscopic equipment can be used to obtain the surface-enhanced infrared absorption spectrum of the molecule to be tested. The uniform surface plasmon thin film is made of a metal material or a dielectric material with a negative real part of the dielectric constant, and its thickness is greater than 200 nm. The detection methods are: (1) experimental test spectrum acquisition; (2) theoretical simulation spectrum acquisition; (3) evaluation function construction; (4) inversion solution; (5) result analysis.