Optical isolators based on nonreciprocal four-wave mixing
Year: 2022
Authors: De Las Heras AM., Carusotto I.
Autors Affiliation: Inst Fis Fundamental IFF, CSIC, Calle Serrano 113b, Madrid 28006, Spain; Univ Trento, CNR BEC Ctr, INO, I-38123 Trento, Italy; Univ Trento, Dipartimento Fis, I-38123 Trento, Italy.
Abstract: In this work we propose and theoretically characterize optical isolators consisting of an all-dielectric and nonmagnetic resonator featuring an intensity-dependent refractive index and a strong coherent field propagating in a single direction. Such devices can be straightforwardly realized in state-of-the-art integrated photonics plat-forms. The mechanism underlying optical isolation is based on the breaking of optical reciprocity induced by the asymmetric action of four-wave mixing processes coupling a strong propagating pump field with copropagating signal and idler modes but not with reverse-propagating ones. Taking advantage of a close analogy with fluids of light, our proposed isolation mechanism is physically understood in terms of the Bogoliubov dispersion of collective excitations on top of the strong pump beam. A few most relevant setups realizing our proposal are specifically investigated, such as a coherently illuminated passive ring resonator and unidirectionally lasing ring or Taiji resonators.
Journal/Review: PHYSICAL REVIEW A
Volume: 106 (6) Pages from: 63523-1 to: 63523-16
More Information: We acknowledge financial support from the European Union FET-Open grant MIR-BOSE (No. 737017), from the H2020-FETFLAG-2018-2020 project PhoQuS (No. 820392), from the Provincia Autonoma di Trento, and from the Q@TN initiative. A.M. acknowledges financial support from the Comunidad de Madrid via Proyecto Sinergico CAM 2020 Y2020/TCS-6545 (NanoQuCo-CM). Stimulating discussions with Giuseppe La Rocca, Alberto Amo, Stefan Rotter, and Stefano Azzini are warmly acknowledged.KeyWords: Wave-guides; Circulators; Reciprocity; PhaseDOI: 10.1103/PhysRevA.106.063523ImpactFactor: 2.900Citations: 1data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-09-15References taken from IsiWeb of Knowledge: (subscribers only)
