Narrow-bandwidth tunable bandstop filters with circularly cylindrical self-suspended silicon gratings
Narrow-bandwidth tunable bandstop filters with circularly cylindrical self-suspended silicon gratings
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DOI：
10.1016/j.ijleo.2009.01.026
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发表时间：
2010-09
期刊：
影响因子：
3.1
通讯作者：
Jia-sheng Ye;Y. Kanamori;F. Hu;K. Hane
中科院分区：
文献类型：
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作者：
Jia-sheng Ye;Y. Kanamori;F. Hu;K. Hane
提出了一种圆柱自悬硅光栅（SSG），并采用严格耦合波法（RCWM）研究了其反射光谱。对于TM入射偏振，当光栅周期调谐时，RCWM的数值结果表明，圆柱SSG在光通信波长区域具有可调谐的窄反射带宽特性。实验还表明，与TE入射偏振和方形光栅截面相比，TM入射偏振和圆形光栅截面更容易带来窄反射带宽。通过微机电系统执行器，所提出的圆柱形SSG有望用作微光通信系统中的窄带宽可调谐带阻滤波器。
A circularly cylindrical self-suspended silicon grating (SSG) is proposed, and its reflectance spectrum is investigated by the rigorous coupled-wave method (RCWM). For TM incident polarization, when the grating period is tuned, numerical results by the RCWM reveal that the circularly cylindrical SSG possesses a tunable narrow reflectance bandwidth property in the optical telecommunication wavelength region. It is also demonstrated that both TM incident polarization and the circular grating cross section are easier to bring narrow reflectance bandwidth, compared with TE incident polarization and square grating cross section. Via a micro-electromechanical systems actuator, the proposed circularly cylindrical SSG is expected to serve as a narrow-bandwidth tunable bandstop filter in micro-optical telecommunication systems.