CAJ | 학술논문

为了提高长波量子阱红外探测器的灵敏度及探测率，采用表面等离激元效应来提高量子阱红外探测器中二维光栅的耦合效率。利用三维时域有限差分算法，分析表面等离激元作用下，长波量子阱红外探测器中二维金属薄膜光栅参数对入射光的调制作用。计算结果表明，对于8μm的入射光，当光栅周期 P＝2．8μm，孔直径D＝1．4μm，光栅层厚度L＝0．04μm时，X-Y 平面内Z方向电场值最大，光栅的耦合效率最高。
위료제고장파양자정홍외탐측기적령민도급탐측솔，채용표면등리격원효응래제고양자정홍외탐측기중이유광책적우합효솔。이용삼유시역유한차분산법，분석표면등리격원작용하，장파양자정홍외탐측기중이유금속박막광책삼수대입사광적조제작용。계산결과표명，대우8μm적입사광，당광책주기 P＝2．8μm，공직경D＝1．4μm，광책층후도L＝0．04μm시，X-Y 평면내Z방향전장치최대，광책적우합효솔최고。
In order to improve the sensitivity and detectivity of the long-wavelength quantum well infrared photodetector (QWIP) ,the surface plasmon was adopted to enhance the optical coupling efficience of two-dimensional grating .The modulation effects of the 2-D metal film grating parameters in long-wavelength QWIP on the incident light were analyzed by using the 3-D finite-difference time-domain (FDTD) algorithm based on surface plasmon .Calculation re-sults show n that the electric field along the Z direction reaches its maximum in the X-Y plane when the grating parameters were taken as P=2 .8μm ,D=1 .4μm and L=0 .04μm for 8μm incident light .