论文标题
基于三模式高对比度光栅的带宽可调光滤波器
Bandwidth tunable optical filter based on a tri-mode high-contrast grating
论文作者
论文摘要
我们提出了一个单片光学带通滤波器，其在三模式高对比度光栅（HCG）中可通过入射角进行透射带宽。我们将这种非凡现象归因于TM $ _ {0} $和TM $ _ {2} $模式与TM1模式的Fabry-Pérot共振之间的破坏性干扰，这只能在倾斜的发生率上激发。透射带宽可以在正常入射率下从零调节，并以入射角四四个增加，而中心波长红色则略微移动。可以将相应的Q因子从10 $^{6} $连续调谐到10 $^{2} $，因为入射角从几乎0 $^{\ text {o}} $增加到10 $^{\ text {\ text {o}} $。
We propose a monolithic optical bandpass filter with a transmission bandwidth tunable by the incident angle in a tri-mode high-contrast grating (HCG). We attribute this extraordinary phenomenon to the destructive interference between the TM$_{0}$ and TM$_{2}$ modes and the Fabry-Pérot resonance of the TM1 mode, which can only be excited at the oblique incidence. The transmission bandwidth can be tuned from zero at normal incidence and increases quadratically with incident angle, while the center wavelength reds shifts slightly. The corresponding Q factor can be continuously tuned from 10$^{6}$ to 10$^{2}$ as the incident angle increases from nearly 0$^{\text{o}}$ to 10$^{\text{o}}$.
