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可见区和近红外区透明的光学材料的折射率较低 ,导致宽的全角反射带等特殊结构设计和制作难度大。为获得单一角度出射的窄频带缺陷模。本文在双微腔耦合的异质结基础上 ,加上低频反射补偿周期结构构成三异质结 ,此三异质结能够实现宽的全角高反带 ,同时使双微腔耦合形成的窄频率锐角度的透射峰不受影响 ,从而实现在 0°到 90°范围内只有某特定的窄频带在特定角度范围内才能透射。
The refractive index of the transparent optical material in the visible region and the near infrared region is relatively low, resulting in difficulty in designing and manufacturing special structures such as a wide-angle reflection band. Narrow-band defect modes for single-angle exit. In this paper, based on the heterojunction of double-microcavity coupling, combined with the periodic structure of low-frequency reflection compensation to form three heterojunction, the three heterojunction can achieve a wide full-width high anti-band, while the dual-microcavity coupling to form a narrow frequency The acute angle of the transmission peak is unaffected, resulting in a range of 0 ° to 90 ° that allows only a specific narrow band to be transmitted over a specific angular range.