Unidirectional reflection from an integrated “taiji” microresonator
Authors: Calabrese A., Ramiro-Manzano F., Price HM., Biasi S., Bernard M., Ghulinyan M., Carusotto I., Pavesi L.
Autors Affiliation: Univ Paris, CNRS, Paris Sci & Lettres, Lab Phys,Ecole Normale Super,ENS, F-75005 Paris, France; Inst Tecnol Quim CSIC UPV, Av Naranjos, Valencia 46022, Spain; Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England; Univ Trento, Dipartimento Fis, Nanosci Lab, Via Sommar 14, I-38123 Povo, TN, Italy; Fdn Bruno Kessler, Ctr Mat & Microsyst, Via Sommar 18, I-38123 Povo, TN, Italy; Univ Trento, INO CNR BEC Ctr, Via Sommar 14, I-38123 Povo, Italy; Univ Trento, Dept Phys, Via Sommar 14, I-38123 Povo, Italy
Abstract: We study light transmission and reflection from an integrated microresonator device, formed by a circular microresonator coupled to a bus waveguide, with an embedded S-shaped additional crossover waveguide element that selectively couples counter-propagating modes in a propagation-direction-dependent way. The overall shape of the device resembles a “taiji” symbol, hence its name. While Lorentz reciprocity is preserved in transmission, the peculiar geometry allows us to exploit the non-Hermitian nature of the system to obtain high-contrast unidirectional reflection with negligible reflection for light incident in one direction and a significant reflection in the opposite direction. (C) 2020 Chinese Laser Press
Journal/Review: PHOTONICS RESEARCH
Volume: 8 (8) Pages from: 1333 to: 1341
KeyWords: WAVE-GUIDEDOI: 10.1364/PRJ.393070Citations: 1data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-03-07References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here