Nondissipative non-Hermitian dynamics and exceptional points in coupled optical parametric oscillators
Abstract
Engineered non-Hermitian systems featuring exceptional points (EPs) can lead to a host of extraordinary phenomena in diverse fields ranging from photonics, acoustics, opto-mechanics, and electronics to atomic physics. In optics, non-Hermitian dynamics are typically realized using dissipation and phase-insensitive gain accompanied by unavoidable fluctuations. Here, we introduce non-Hermitian dynamics of coupled optical parametric oscillators (OPOs) arising from phase-sensitive amplification and de-amplification, and show their distinct advantages over conventional non-Hermitian systems relying on laser gain and loss. OPO-based non-Hermitian systems can benefit from the instantaneous nature of the parametric gain, noiseless phase-sensitive amplification, and rich quantum and classical nonlinear dynamics. We show that two coupled OPOs can exhibit spectral anti-parity-time (anti-PT) symmetry and a EP between its degenerate and nondegenerate operation regimes. To demonstrate the distinct potentials of the coupled OPO system compared to conventional non-Hermitian systems, we present higher-order EPs with two OPOs, tunable Floquet EPs in a reconfigurable dynamic non-Hermitian system, and the generation of a squeezed vacuum around EPs, all of which are not easy to realize in other non-Hermitian platforms. We believe our results show that coupled OPOs are an outstanding non-Hermitian setting with unprecedented opportunities to realize nonlinear dynamical systems for enhanced sensing and quantum information processing.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 18, 2021
- Source ID
- 10.1364/optica.415569
Entities
People
- Alireza Marandi
- Arkadev Roy
- Avik Dutt
- Mohammad-Ali Miri
- Qiushi Guo
- Saman Jahani
- Shanhui Fan
Organizations
- Army Research Office
- California Institute of Technology
- City University of New York
- National Science Foundation
- Stanford University
- United States Department of Defense