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energy absorber

An energy absorber and absorption structure technology, which is applied in the field of integrated optics, can solve the problems of low spectral width, high requirements on structural parameters, instability, etc., and achieves low processing requirements, simple structural design, and large processing errors. Effect

Active Publication Date: 2019-11-22
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0002] Traditional energy absorbers mostly use resonant cavity schemes to eliminate reflection and transmission. However, the resonant cavity must work under the condition of critical coupling, and the structural parameters of the cavity are very high. The absorption spectrum of the resonant cavity is Loren The spectral width is relatively low, and the resonant center wavelength of the resonant cavity is very sensitive to temperature. After working for a period of time, the energy stored in the cavity will cause the temperature to rise, which will cause instability. It takes time to start a stable oscillation, so it is not conducive to the application of ultrafast pulse correlation. In particular, in the integrated optical circuit, the energy is usually a mode of specific polarization. For the same resonant cavity structure, its resonance peaks are usually different, so it is difficult to realize Simultaneous absorption of two polarizations

Method used

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experiment example 1

[0036] An energy absorber was designed by applying the above scheme, so that the length of the metal absorbing structure 32 is l=20 μm, the metal material is gold (Au), and the rectangular cross-sectional size of the metal absorbing structure is 1.5 μm×0.8 μm.

[0037] Any propagating field in a dielectric optical waveguide can be regarded as a linear superposition of all eigenmodes, which is similar to Fourier series in form, where the proportion of each eigenmode in the total electric field is recorded as C(n i ), known as the weighting factor, n i is the effective refractive index of the eigenmode. The weight factor of each eigenmode can be obtained by Fourier transforming the total electric field E(z) on the central axis of the waveguide, where n i The preceding symbol represents the direction of energy propagation.

[0038] Figure 4 It is the Fourier transform spectrogram of the metal adiabatic structure in an experimental example of the present invention and the rela...

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Abstract

The invention provides an energy absorber comprising a dielectric optical waveguide which is used for transmitting photons; and a metal wrapping layer which comprises a metal absorption structure in which the metal layer completely wraps the dielectric optical waveguide.

Description

technical field [0001] The invention relates to the technical field of integrated optics, in particular to an energy absorber. Background technique [0002] Traditional energy absorbers mostly use resonant cavity schemes to eliminate reflection and transmission. However, the resonant cavity must work under the condition of critical coupling, and the structural parameters of the cavity are very high. The absorption spectrum of the resonant cavity is Loren The spectral width is relatively low, and the resonant center wavelength of the resonant cavity is very sensitive to temperature. After working for a period of time, the energy stored in the cavity will cause the temperature to rise, which will cause instability. It takes time to start a stable oscillation, so it is not conducive to the application of ultrafast pulse correlation. In particular, in the integrated optical circuit, the energy is usually a mode of specific polarization. For the same resonant cavity structure, it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/12
CPCG02B6/12G02B2006/12126
Inventor 熊霄邹长铃任希锋郭光灿
Owner UNIV OF SCI & TECH OF CHINA
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