Open AccessHybridization of circular and rectangular transverse profiles of nanophotonic modes for nonlinear optics
Author(s) -
Xiyuan Lu,
Wei Jiang,
Kartik Srinivasan
Publication year - 2021
Publication title -
optics letters/optics index
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.426043
Subject(s) - nanophotonics , transverse plane , resonator , optics , physics , transverse mode , nonlinear optics , waveguide , nonlinear system , photonics , coupling (piping) , optoelectronics , materials science , engineering , quantum mechanics , laser , structural engineering , metallurgy
Nanophotonic modes within rectangular cross sections are typically considered to have transverse rectangular field profiles. In this work, we show that, despite the rectangular cross section of most integrated waveguides and microring resonators, there exists considerable hybridization of transverse rectangular modes and transverse circular modes. These hybridized modes can be advantageous in nonlinear wave mixing processes. We use third-harmonic generation as an example to confirm that such a hybridized mode is advantageous in combining reasonable mode overlap and waveguide coupling to a fundamental mode in a silicon nitride microring. Our work illuminates the potential of using transverse circular modes in nanophotonic applications.