A controllable switching optocoupler based on valley photonic crystal and metal micro-nano optical cavity
A technology of photonic crystals and optical couplers, which is applied in optics, optical components, instruments, etc., can solve the problems of low degree of freedom in regulation of energy valley photonic crystal devices and low degree of freedom in regulation of micro-nano-scale optical couplers, and achieve improved regulation The effect of degrees of freedom
Active Publication Date: 2022-07-22
PEKING UNIV
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[0006] Aiming at the current problem of low degree of freedom in regulation of energy valley photonic crystal devices, the purpose of the present invention is to provide an optical coupler with switching characteristics, which solves the problem of low degree of freedom in regulation of micro-nano-scale optical couplers
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[0026] Below in conjunction with the accompanying drawings, the technical solutions of the present invention will be further described through embodiments.
[0027] figure 1 Shown is the controllable switch optical coupler based on energy valley photonic crystal and metal micro-nano optical cavity of the present invention. The large rectangular area is a two-dimensional energy valley photonic crystal array formed by drilling holes in a silicon-based substrate according to certain rules, wherein , the first demarcation line 4 and the second demarcation line 5 divide the energy valley photonic crystal array into three regions: the first region 1, the second region 2 and the third region 3; the two demarcation lines are equivalent to two boundary state waveguides , participates in the two-way optical coupling of the coupler, one end of the two boundary lines is connected to the two input waveguides 10 , and the other end is connected to the two output waveguides 11 . A rectangul...
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Abstract
The invention discloses a controllable switch optical coupler based on energy valley photonic crystal and metal micro-nano optical cavity. By combining the boundary state mode of two-dimensional energy valley photonic crystal and the resonance mode of metal surface plasmon, The micro-nano-scale hybrid optical mode is constructed to solve the contradiction between controllability and topological robustness. Among them, the boundary state mode can control the splitting ratio of the coupler, and the metal micro-nano optical cavity can control whether the output has or not. Therefore, the optical coupler with controllable switch and dynamically adjustable beam splitting ratio is realized, and the control freedom of the energy valley photonic crystal array waveguide is improved. The dynamically tunable topology photonic coupler can be used to integrate optoelectronic chips as an important platform for optoelectronic information processing.
Description
technical field [0001] The invention belongs to the fields of topological photonics and integrated photonics, and relates to a controllable switching optical coupler based on an energy valley photonic crystal and a metal micro-nano optical cavity. The composite structure of the array and the metal nanoparticle optical cavity simultaneously realizes a new optical device with arbitrary beam splitting ratio optical coupling and controllable switching function. Background technique [0002] With the trend of miniaturization and integration of on-chip optical devices, effective regulation of light transmission at the micro-nano scale has attracted wide attention. It shows great advantages in the field of integrated optoelectronics. [0003] Valley photonic crystal is an important platform in the field of micro-nano photonics. Its unique energy band structure is conducive to optical field modulation. Light whose frequency is located in the band gap of photonic crystal cannot be t...
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IPC IPC(8): G02B6/122
CPCG02B6/1225G02B2006/12147
Inventor 韩旭吴赵龙欧阳颀
Owner PEKING UNIV