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楔形导模共振滤波片的光谱分析

Spectral Characteristics of Guided-Mode Resonance Filter with Wedged Waveguide Layer

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摘要

针对通信波段设计并制作了楔形波导层的导模共振滤波片(GMRF),分析并研究了其光谱特性。采用三角掩模板的方法进行离子束刻蚀,刻蚀一定次数后获得楔形波导层。光栅线条方向分为平行于和垂直于楔形波导层变化的方向。实验结果表明,对于两种结构,共振峰的位置与滤波片上的位置呈近似线性关系。光栅刻槽平行于楔形层变化的方向时共振峰的半峰全宽较光栅刻槽垂直于楔形层变化的方向时大。最终在20 mm的样品上,获得了线性渐变的Ta2O5楔形薄膜,其反射谱在1560~1600 nm范围内近似于线性变化。

Abstract

We designed and fabricated guided-mode resonance filters (GMRFs) with a wedged waveguide layer, and analyzed their spectral characteristics. GMRF was etched for several times with the ion-beam etching technique and a triangle-shaped mask to obtain a wedged waveguide layer. The lines of photoresist gratings and thickness variation direction of the wedge-shaped waveguide layer are either parallel or perpendicular to each other. The experimental results show that the relationship between the resonance peak wavelength and position on the filter is approximately linear for the two samples. The half width at maximum in the case that the grating lines are parallel to the thickness variation direction of the wedge-shaped waveguide layer is larger than that in the case that the grating lines are perpendicular to the thickness variation direction. Through a linear gradation in the thickness of the Ta2O5 film across a distance of 20 mm, the spectral location of the reflection peaks was found to vary nearly linearly across the spectral range of 1560-1600 nm.

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中图分类号:O436

DOI:10.3788/cjl201643.1011001

所属栏目:光谱学

基金项目:国家重点基础研究发展计划(2015CB352001)、国家重大科学仪器设备开发专项(2011YQ14014704)、国家自然科学基金(61378060,61205156)、上海市科学仪器重点项目(14142200902)

收稿日期:2016-06-02

修改稿日期:2016-07-17

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周红艳:上海理工大学光电信息与计算机工程学院上海市现代光学系统重点实验室, 教育部光学仪器与系统工程中心, 上海 200093
盛斌:上海理工大学光电信息与计算机工程学院上海市现代光学系统重点实验室, 教育部光学仪器与系统工程中心, 上海 200093
倪争技:上海理工大学光电信息与计算机工程学院上海市现代光学系统重点实验室, 教育部光学仪器与系统工程中心, 上海 200093
黄元申:上海理工大学光电信息与计算机工程学院上海市现代光学系统重点实验室, 教育部光学仪器与系统工程中心, 上海 200093
张大伟:上海理工大学光电信息与计算机工程学院上海市现代光学系统重点实验室, 教育部光学仪器与系统工程中心, 上海 200093

联系人作者:周红艳(630420506@qq.com)

备注:周红艳(1991—),女,硕士研究生, 主要从事全息光栅和离子束刻蚀表面微细加工方面的研究。

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引用该论文

Zhou Hongyan,Sheng Bin,Ni Zhengji,Huang Yuanshen,Zhang Dawei. Spectral Characteristics of Guided-Mode Resonance Filter with Wedged Waveguide Layer[J]. Chinese Journal of Lasers, 2016, 43(10): 1011001

周红艳,盛斌,倪争技,黄元申,张大伟. 楔形导模共振滤波片的光谱分析[J]. 中国激光, 2016, 43(10): 1011001

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