Work

4H-SiC microring resonators for nonlinear integrated photonics

Year: 2019

Type: article

Abstract: We demonstrate enhanced four-wave mixing (FWM) in high-quality factor, high-confinement 4H-SiC microring resonators via continuous-wave FWM. With the large power buildup effect of the microring resonator, −21.7 dBFWM conversion efficiency is achieved with 79 mW pump power. Thanks to the strong light confinement in SiC-on-insulator (SiCOI) waveguides with submicrometer cross-sectional dimensions, a high nonlinear parameter wγ of 7.4±0.9 W−1 m−1 is obtained, from which the nonlinear refractive index (n2) of 4H-SiC is estimated to be (6.0±0.6)×10−19 m2/W at the telecom wavelengths. Besides, we are able to engineer the dispersion of a SiCOI waveguide to achieve 3 dB FWM conversion bandwidth of more than 130 nm. This work represents a step toward enabling all-optical signal processing functionalities using highly nonlinear SiCOI waveguides.

Source: Optics Letters

DOI: 10.1364/ol.44.005784

Authors: Yi Zheng, Minhao Pu, Ailun Yi, Xin Ou, Haiyan Ou

Institutions: Technical University of Denmark, Chinese Academy of Sciences, Shanghai Institute of Microsystem and Information Technology, State Key Laboratory of Functional Materials for Informatics

Language: English

Topic: Photonic and Optical Devices

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: Danmarks Grundforskningsfond, National Natural Science Foundation of China

Awards: G2638427067, G4477101172, Center for Silicium Fotonik til Optisk Kommunikation (SPOC), G6976002055