Back to Search
Start Over
Optomechanical Anti-Lasing with Infinite Group Delay at a Phase Singularity.
- Source :
-
Physical Review Letters . 12/31/2021, Vol. 127 Issue 27, p1-1. 1p. - Publication Year :
- 2021
-
Abstract
- Singularities which symbolize abrupt changes and exhibit extraordinary behavior are of a broad interest. We experimentally study optomechanically induced singularities in a compound system consisting of a three-dimensional aluminum superconducting cavity and a metalized high-coherence silicon nitride membrane resonator. Mechanically induced coherent perfect absorption and anti-lasing occur simultaneously under a critical optomechanical coupling strength. Meanwhile, the phase around the cavity resonance undergoes an abrupt p-phase transition, which further flips the phase slope in the frequency dependence. The observed infinite discontinuity in the phase slope defines a singularity, at which the group velocity is dramatically changed. Around the singularity, an abrupt transition from an infinite group advance to delay is demonstrated by measuring a Gaussian-shaped waveform propagating. Our experiment may broaden the scope of realizing extremely long group delays by taking advantage of singularities. [ABSTRACT FROM AUTHOR]
- Subjects :
- *INFINITE groups
*SILICON nitride
*GROUP velocity
*RESONANCE
*RESONATORS
Subjects
Details
- Language :
- English
- ISSN :
- 00319007
- Volume :
- 127
- Issue :
- 27
- Database :
- Academic Search Index
- Journal :
- Physical Review Letters
- Publication Type :
- Academic Journal
- Accession number :
- 175712903
- Full Text :
- https://doi.org/10.1103/PhysRevLett.127.273603