Broadband silicon polarization beam splitter based on Floquet engineering
Optics
2026-02-05 v3 Applied Physics
Abstract
A broadband silicon polarization beam splitter (PBS) is proposed and experimentally demonstrated based on Floquet-engineered directional couplers. The total length of the coupling structure is 20 um . By periodically modulating the waveguide width of the directional couplers, the power exchange between the two waveguides for the transverse-electric (TE) mode is suppressed, whereas the power coupling for the transverse-magnetic (TM) mode is enhanced. The fabricated PBS exhibits polarization extinction ratios (PERs) > 20 dB for both polarizations over a broad wavelength range of 1483 nm-1620 nm. Additionally, the measured insertion losses (ILs) are 0.15 dB and 1.2 dB at 1550 nm for TE and TM polarizations, respectively.
Keywords
Cite
@article{arxiv.2601.11955,
title = {Broadband silicon polarization beam splitter based on Floquet engineering},
author = {Ning Ma and Yu Chen and Yunjie Li and Shubin Huang and Wen-di Li and Minghua Chen and Ciyuan Qiu},
journal= {arXiv preprint arXiv:2601.11955},
year = {2026}
}
Comments
8 pages,6 figures