AUTHOR=Byers James , Debnath Kapil , Arimoto Hideo , Husain Muhammad K. , Sotto Moïse , Hillier Joseph , Kiang Kian , Thomson David J. , Reed Graham T. , Charlton Martin , Saito Shinichi 

TITLE=10 nm SiO2 TM Slot Mode in Laterally Mismatched Asymmetric Fin-Waveguides

JOURNAL=Frontiers in Physics

VOLUME=9

YEAR=2021

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2021.659585

DOI=10.3389/fphy.2021.659585

ISSN=2296-424X

ABSTRACT=<p>In this paper we demonstrate that by breaking the left/right symmetry in a bi-planar double-silicon on insulator (SOI) photonic crystal (PhC) fin-waveguide, we can couple the conventionally used transverse-electric (TE) polarized mode to the transverse-magnetic (TM) polarization slot-mode. Finite difference time domain (FDTD) simulations indicate that the TE mode couples to the robust TM mode inside the Brillouin zone. Broadband transmission data shows propagation identified with horizontal-slot TM mode within the TE bandgap for fully mismatched fabricated devices. This simultaneously demonstrates TE to TM mode conversion, and the narrowest Si photonics SiO<sub>2</sub> slot-mode propagation reported in the literature (10 nm wide slot), which both have many potential telecommunication applications.</p>