|
| 一种导模共振窄带宽的平顶滤波器设计 |
| A narrowband flat-top filter based on guided-mode resonance effect |
| 投稿时间：2020-12-15 |
| DOI：10.3969/j.issn.1005-5630.2021.02.009 |
| 中文关键词: 亚波长光栅 导模共振 平顶滤波器 法布里?珀罗腔 |
| 英文关键词:sub-wavelength grating guided mode resonance flat-top filter Fabry-Perot cavity |
| 基金项目: |
|
| 摘要点击次数: 2713 |
| 全文下载次数: 2186 |
| 中文摘要: |
| 鉴于导模共振滤波器具有高峰值反射率、低旁带反射、窄带以及带宽可控等优良特性，采用亚波长光栅的导模共振效应设计了一种平顶滤波器。通过将亚波长光栅与类法布里?珀罗腔结合使用，实现了窄带宽平顶滤波的效果。基于严格耦合波分析方法和等效介质理论，使用FDTD软件对光栅衍射效率进行了仿真分析。仿真结果表明，平顶滤波器在1130 nm处可获得2 nm宽的平顶，同时半高全宽达到6 nm，透射效率达到98%。通过微机电系统可以线性调节类法布里?珀罗腔的厚度，该器件可调谐的波长范围为1 130～1 300 nm，可应用于光通信、光开关等领域。 |
| 英文摘要: |
| A guide mode resonance device represents a unique class of filters that can reflect a narrow resonance band with almost 100% efficiency and low sideband. In this paper, a flat-top filter is designed using the guided-mode resonance effect of the sub-wavelength grating.By combining it with a Fabry-Perot-like cavity, the effect of narrow-bandwidth flat-top filtering is realized.The transmission spectrum of the proposed filter shows a flat-top width of 2 nm and a full width at half maximum of 6 nm can be obtained. The spectrum shows good rectangularity and suppressed sidebands with the transmittance up to 98%. In the simulation, the microelectromechanical system can be used to linearly adjust the thickness of the Fabry-Perot-like cavity, realizing the tuning characteristic of the resonance peak wavelength between 1130 and 1300 nm.The device has potential applications in the fields of optical communication and optical switches. |
| HTML 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
