Chiral exceptional point and coherent suppression of backscattering in silicon microring with low loss Mie scatterer

Title	Chiral exceptional point and coherent suppression of backscattering in silicon microring with low loss Mie scatterer
Authors	Hwaseob Lee, Ali Kecebas, Feifan Wang, Lorry Chang, Sahin K. Özdemir, Tingyi Gu
Magazine	eLight
Date	09/04/2023
DOI	10.1186/s43593-023-00043-5
Introduction	Non-Hermitian systems' exceptional points (EPs) are crucial for lasing, light transport control, and sensor enhancement. Traditional EP achievement in ring resonators involves nanotips, but understanding of nanotips' symmetry impact and scattering loss is limited. Here, defined Mie scatterers achieve EPs, enabling chiral light transport and backscattering suppression, thereby improving quality factors. This platform is essential for stable resonance applications such as frequency combs and nonlinear optics.
Quote	Hwaseob Lee, Ali Kecebas and Feifan Wang et al. Chiral exceptional point and coherent suppression of backscattering in silicon microring with low loss Mie scatterer. eLight. 2023. Vol. 3(1). DOI: 10.1186/s43593-023-00043-5
Element	Silicon (Si)
Industry	Optics