Affiliation:
1. Ulink College of Suzhou Industrial Park
Abstract
Perfectly matched layer (PML) is a virtual absorption boundary condition adopted in numerical simulations, capable of absorbing light from all incident angles, which however is still lacking in practice in the optical regime. In this work, by integrating dielectric photonic crystals and material loss, we demonstrate an optical PML design with near-omnidirectional impedance matching and customized bandwidth. The absorption efficiency exceeds 90% for incident angle up to 80°. Good consistence is found between our simulations and proof-of-principle microwave experiments. Our proposal paves the road to realize optical PMLs, and could find applications in future photonic chips.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Jiangsu Province
Key Technologies Research and Development Program
Priority Academic Program Development of Jiangsu Higher Education Institutions
Subject
Atomic and Molecular Physics, and Optics