Polarization‐directed nanophotonic routers based on two‐dimensional inorganic molecular crystals

• Published in: InfoMat 2024-08, Vol.6 (8), p.n/a
• Main Authors: Yao, Jiacheng, Feng, Xin, Zhang, Tingting, Chen, Fangqi, Zhang, Zhenglong, Zheng, Hairong, Zhai, Tianyou, Ding, Tao
• Format: Article
• Language: English
• Subjects: Antimony trioxide; Beam splitters; Crystals; Dielectric properties; Dielectric waveguides; Efficiency; Lasers; Light; Multiplexing; nanoflakes; Nanowires; Photon beams; Photonic crystals; Plasmonics; polarization; Polarization mode dispersion; Propagation; Propagation modes; Routers; Sb2O3; Simulation; Spectrum analysis; Wave propagation; waveguides
• ISSN: 2567-3165; 2567-3165
• DOI: 10.1002/inf2.12548

Photonic and plasmonic hybrid nanostructures are the key solution for integrated nanophotonic circuits with ultracompact size but relative low loss. However, the poor tunability and modulability of conventional waveguides makes them cumbersome for optical multiplexing. Here we make use of two‐dimensional molecular crystal, α‐Sb2O3 as a dielectric waveguide via total internal reflection, which shows polarization‐sensitive modulation of the propagating beams due to its large polarization mode dispersion. Both experiments and simulations are performed to verify such concept. These Sb2O3 nanoflakes can be coupled with plasmonic nanowires to form nanophotonic beam splitters and routers which can be easily modulated by changing the polarization of the incidence. It thus provides a robust, exploitable and tunable platform for on‐chip nanophotonics. Nanoflakes of inorganic molecular crystals (Sb2O3) show polarization‐sensitive waveguiding property based on total internal reflection and large polarization mode dispersion, which can be combined with plasmonic waveguide to form hybrid beam splitters and routers with relative low loss.