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Superspeed photon crystal response tuning method and apparatus thereof

A photonic crystal, ultra-fast technology, applied in crystal growth, chemical instruments and methods, optics, etc., can solve the problems of untunable tuning response speed, complex structure of photonic crystal tuning equipment, etc., to achieve simple equipment, simple and fast data testing, Achieve ultra-fast time response effects

Inactive Publication Date: 2004-07-07
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the main disadvantages of complex or untunable crystal preparation or slow tuning response speed in the prior art, and at the same time, the complex structure of photonic crystal tuning equipment, thereby providing a method and device for ultra-fast response tuning of photonic crystals

Method used

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  • Superspeed photon crystal response tuning method and apparatus thereof
  • Superspeed photon crystal response tuning method and apparatus thereof
  • Superspeed photon crystal response tuning method and apparatus thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The required three-dimensional nonlinear organic conjugated photonic crystal is prepared by self-organized growth of organic conjugated materials, and the steps are as follows:

[0038] (1): Use two glass substrates with grade II finish, 2 mm in thickness, and 20 mm in diameter, one of which leaves a round hole with a diameter of 3 mm at a distance of 5 mm from the center of the circle, and inserts a diameter of 3 mm in the round hole. 15mm hollow glass tube, the insertion depth is 1.5mm, and glued with resin;

[0039] (2): Glue the two substrates together, leaving a trumpet-shaped space in the middle for growing photonic crystals. The bonding thickness is 0.3mm, which can also be selected from microns to millimeters according to actual requirements. The bell-shaped mouth is sealed with titanium dioxide powder. Wrap the outer edge of the substrate with a 4mm wide rubber strip and tie it tightly with a thin copper wire;

[0040] (3): Fill the glass tube with a suspens...

Embodiment 2

[0043] according to figure 1 Build the photonic crystal ultra-fast response tuning device provided by the present invention, including pump optical path, detection optical path and signal processing system:

[0044] Described pumping optical path comprises pumping laser 1, half-mirror 3, delay line 4, 45 ° total mirror 5 and half-mirror 8; Wherein half-mirror 3 is between pumping laser 1 and Between the delay lines 4, it forms an angle of 45° with the pumping optical path. The delay line 4 is a 180° non-collinear reflection to the pump laser light. The 45° total reflection mirror 5 is on the reflection optical path of the delay line 4. 8 and the two reflective surfaces of the 45° total reflection mirror 5 are perpendicular to each other, and both are 45° incident to the pump laser light.

[0045] Described detection light path comprises detection laser 2 and half-mirror 8; Wherein detection laser 2 is positioned at the reflected optical path of half-mirror 3, and it is pumped...

Embodiment 3

[0054] The device built in Example 2 is used to measure the tuning response time and tunability of the photonic crystal.

[0055] Adjust the bandpass attenuator to set the intensity of the pump laser passing through the polystyrene photons to 40.6GW / cm 2 ; Adjust the OPA laser to set the wavelength of the probe laser to 580nm, which is located at the long-wave band edge of the photonic band gap of the polystyrene photonic crystal. Adjust the delay line 4 to measure the change curve of the transmittance of the probe laser with time delay, such as image 3 Shown: The signal curve is distributed symmetrically around the zero time delay, and the detection laser transmittance reaches the minimum value at the time delay of zero. The half-minimum full width (HMFW) of the signal curve is close to the pulse width of the pump laser, indicating that the tuning response time of the polystyrene photonic crystal is much faster than that of the measurement system. Therefore, in this embodi...

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Abstract

The method prepares desired organic conjugate material photo crystal of three-dimensional non-linear by self-organizing growth of organic conjugate material, pumping laser incomes the photo crystal along [111] crystal orientation of the organic conjugate material photo crystal to excite third order non-linear effect of organic conjugate material so as to change photo band gap position of crystal, the photo band gap position can be changed by regulating pumping laser strength so tuning of response time up to fs order for the photo crystal in organic conjugate material is achieved. The device which comprises pumping light path, detecting light path and signal processing system is provided in the present invention.

Description

field of invention [0001] The invention relates to a method and device for ultra-fast response tuning of a photonic crystal, in particular to a method and device for ultra-fast response tuning of a three-dimensional nonlinear organic conjugate material photonic crystal. Background technique [0002] Photonic crystals are crystals that are composed of two different dielectric materials and whose dielectric constant changes periodically in space. The photonic crystal has a photonic band gap, and the light whose wavelength (or frequency) falls within the photonic band gap will be completely reflected back and cannot pass through the photonic crystal. Utilizing the photonic bandgap of photonic crystals can effectively control the transmission process of light, so it has a very wide range of applications in the field of integrated photonic devices and optical communications. However, after the preparation of ordinary photonic crystals, the position and width of the photonic band...

Claims

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Application Information

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IPC IPC(8): C30B29/54G02F1/01H01S3/10
Inventor 胡小永张琦刘元好程丙英张道中
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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