Two-dimensional photonic crystal composite structure enhancing broad spectrum light absorption
A technology of two-dimensional photonic crystals and composite structures, applied in light guides, optics, optical components, etc., can solve the problems of failing to achieve high-efficiency light absorption at the same time, and achieve the effect of enhancing broadband light absorption
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[0047] specific implementation plan
[0048] In order to make the purpose, technical solution and effect of the present invention clearer, the specific implementation manner of the present invention will be further described below in conjunction with the drawings and specific examples.
[0049] We propose a composite structure consisting of absorbing and reflecting layers. By introducing an inverted pyramid groove photonic crystal structure and random pyramid grooves, the optical path is increased, thereby enhancing light diffraction and scattering, and at the same time realizing p-polarized and s-polarized incident light from ultraviolet to infrared bands, and even wider bands. Absorption and electric field enhancement, light absorption even exceeds the Yablonovitch limit in the infrared band, and the absorption efficiency is insensitive to angle changes. This structure has a great application prospect in the design of solar cells, photoelectric detection and so on.
[0050...
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