Broadband silicon polarization beam splitter based on Floquet engineering

Authors:
Publisher website
Google Scholar
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 μm. By periodically modulating the waveguide widths of the directional couplers, the power exchange between the two waveguides for the transverse-electric (TE) mode is suppressed, while 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 1483–1620 nm. Additionally, the measured insertion losses (ILs) are 0.15 dB and 1.2 dB at 1550 nm for TE and TM polarizations, respectively.
Funding Information
  • National Key Research and Development Program of China (2024YFE0204000)
  • National Natural Science Foundation of China (62275149)
  • National Natural Science Foundation of China (U23A20356)
  • Open Fund of State Key Laboratory of Optoelectronic Materials and Devices (SKLOEMD-OP-2025-G01)

This publication has 23 references indexed in Scilit: