波长可调谐导模共振滤波器的设计及优化  

Design and Optimization of Wavelength Tunable Guide Mode Resonance Filter

作　　者：江孝伟 武华 王飞[1] 

机构地区：[1]衢州职业技术学院信息工程学院,浙江衢州324000 [2]北京工业大学电子信息与控制工程学院光电子技术实验室,北京100124 [3]赣南师范大学物理与电子信息学院,江西赣州341000

出　　处：《激光与光电子学进展》2017年第10期87-92,共6页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61650404);浙江省教育厅一般科研项目(Y201738091);衢州市科技计划项目(2015Y021);赣南师范大学招标课题(16zb04)

摘　　要：利用严格耦合波法设计并优化了中心波长为1.55μm,基于液晶的波长可调谐导模共振滤波器(WTGMF)。通过计算得知减反层和衬底的厚度均对滤波器的共振线宽有影响,减反层的厚度越薄共振线宽越宽,但是对于衬底厚度总存在着一个最优的厚度使线宽达到最窄,当衬底厚度为300nm时,线宽缩小到最窄的0.96nm。另外决定WTGMF的波长调谐范围的主要因素是液晶层的厚度,调谐范围随着液晶层厚度的增加而增加并最终达到稳定,当液晶层厚度达到1600nm时波长调谐范围达到最大的39nm。Based on liquid crystal, a wavelength tunable guide mode resonance filter （WTGMF） with a center wavelength of 1.55μm is designed and optimized by using the rigorous coupled wave method. From calculation, the thicknesses of anti-reflection layer and substrate both have influence on the resonance line width of the filter. The thinner the thickness of anti-reflection layer is, the wider the resonance line width is. However, there is always an optimum substrate thickness to minimize the line width. When the substrate thickness is 300 nm, the resonance width i8 the narrowe^t with only 0.96 nm. In addition, the main factor that determine the wavelength tuning range of WTGMF is the thickness of the liquid crystal layer. The tuning range increases with the increase of the thickness of the liquid crystal layer and finally reaches stability. When the thickness of the liquid crystal layer reaches 1600 nm, the wavelength tuning range reaches the maximum of 39 nm.

关 键 词：光栅 导模共振 严格耦合波法 线宽 液晶 

分 类 号：TN25[电子电信—物理电子学]