Abstract
An ultracompact hybrid plasmonic waveguide Bragg grating (HPWBG) with improved spectral properties of long-wavelength passband is proposed. A hollow HPW is introduced to suppress the entire loss, and a parabolic profiled sidewall is designed to optimize the spectral properties for specific wave bands. The transfer matrix method and finite element method are combined to ensure the efficiency of numerical research. The results show that the parabolic profile effectively reduces the reflection and strengthens the resonance of the mode in the long-wavelength passband, suppressing the oscillations and realizing significant smoothness and improvement in transmission. The optimized transmittance is greater than 99%, and insertion loss is as low as 0.017 dB. A wide bandgap of 103 nm is also attained. The structure also has a compactness with a length of 3.4 µm and exhibits good tolerance. This work provides a scheme for designing and optimizing wavelength selecting devices and has potential application value in integrated photonic devices.
© 2023 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Ji Xu, Han Yao, Tiantian Chi, Huichao Cheng, Wenjie Yue, Biying Liu, Xinrong Zhang, Sheng Li, Baifu Zhang, Yunqing Lu, and Ning Liu
Appl. Opt. 63(15) 4125-4130 (2024)
Xinze Yang, Ji Xu, Tiantian Chi, Tiannuo Zhou, Mulin Chen, Jun Wang, Ning Liu, Yunqing Lu, and Zhongcheng Liang
Appl. Opt. 61(22) 6571-6576 (2022)
Hao Sun and Lawrence R. Chen
Opt. Express 31(2) 1214-1223 (2023)