Zou Yi, Subbaraman Harish, Chakravarty Swapnajit, Xu Xiaochuan, Hosseini Amir, Lai Wei-Cheng, Wray Parker, Chen Ray T
Opt Lett. 2014 May 15;39(10):3070-3. doi: 10.1364/OL.39.003070.
We demonstrate subwavelength bidirectional grating (SWG) coupled slot waveguide fabricated in silicon-on-sapphire for transverse electric polarized wave operation at 3.4 μm wavelength. Coupling efficiency of 29% for SWG coupler is experimentally achieved. Propagation loss of 11 dB/cm has been experimentally obtained for slot waveguides. Two-step taper mode converters with an insertion loss of 0.13 dB are used to gradually convert the strip waveguide mode into slot waveguide mode.
我们展示了在蓝宝石衬底上的硅中制造的亚波长双向光栅（SWG）耦合槽波导，用于在3.4μm波长下进行横向电极化波操作。实验测得SWG耦合器的耦合效率为29%。实验测得槽波导的传播损耗为11dB/cm。插入损耗为0.13dB的两步渐变模式转换器用于将条形波导模式逐渐转换为槽波导模式。
