Wang Zhanshan, Sang Tian, Wang Li, Jiao Hongfei, Wu Yonggang, Zhu Jingtao, Chen Lingyan, Wang Shao-Wei, Chen Xiaoshuang, Lu Wei
Department of Physics, Institute of Precision Optical Engineering, Tongji University, Shanghai 200092, China.
Appl Opt. 2008 May 1;47(13):C1-8. doi: 10.1364/ao.47.0000c1.
We propose and demonstrate three approaches to achieve narrowband multichannel filters. These are multiple heterostructures with defects, guided-mode resonance (GMR) Brewster filters with multiple channels, and integrated narrow bandpass filter arrays. Transmission studies for multiple heterostructures with defects are presented. We show that the enlargement of the forbidden band and multiple-channel filtering can be reached simultaneously with these configurations. GMR Brewster filters with multiple channels can be obtained with a single-layer grating. The same properties can be obtained by use of double-layer structures that consist of a homogeneous layer and a grating with equal refractive index. We developed a combinatorial etching technique that has 32 elements on a single substrate with which to fabricate integrated narrow bandpass filters. Single- and double-chamber integrated optical filter arrays were fabricated by use of this etching technique. These narrowband multichannel filters and narrow bandpass filter arrays show good filtering features and can be utilized in many optical applications.
我们提出并演示了三种实现窄带多通道滤波器的方法。这些方法包括具有缺陷的多个异质结构、具有多个通道的导模共振（GMR）布鲁斯特滤波器以及集成窄带通滤波器阵列。文中给出了具有缺陷的多个异质结构的传输研究。我们表明，通过这些配置可以同时实现禁带展宽和多通道滤波。具有多个通道的GMR布鲁斯特滤波器可以用单层光栅获得。通过使用由具有相同折射率的均匀层和光栅组成的双层结构也可以获得相同的特性。我们开发了一种组合蚀刻技术，在单个基板上有32个元件，用于制造集成窄带通滤波器。利用这种蚀刻技术制造了单腔和双腔集成光学滤波器阵列。这些窄带多通道滤波器和窄带通滤波器阵列具有良好的滤波特性，可用于许多光学应用中。
