Affiliation:
1. Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province
Abstract
We propose and demonstrate a high quality (Q) factor racetrack resonator based on uniform multimode waveguides in high-index contrast chalcogenide glass film. Our design features two carefully designed multimode waveguide bends based on modified Euler curves, which enable a compact 180° bend and reduce the chip footprint. A multimode straight waveguide directional coupler is utilized to couple the fundamental mode without exciting higher-order modes in the racetrack. The fabricated micro-racetrack resonator shows a record-high intrinsic Q of 1.31×106 for selenide-based devices, with a relatively low waveguide propagation loss of only 0.38 dB/cm. Our proposed design has potential applications in power-efficient nonlinear photonics.
Funder
Natural Science Foundation of Zhejiang Province
National Key Research and Development Program of China
Natural Science Foundation of Ningbo
National Natural Science Foundation of China
K. C. Wong Magna Fund in Ningbo University
3315 Innovation Team in Ningbo City
Subject
Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering