Dynamic control of photon lifetime for quantum random number generation
Abstract
In a passive cavity geometry, there exists a trade-off between resonant enhancement and response time, which is inherently limited by the cavity photon lifetime. We demonstrate frequency-selective, dynamic control of the photon lifetime using a silicon-nitride coupled-ring resonator. The photon lifetime is tuned by controlling an avoided mode crossing using thermo-optic tuning of the cavity resonance with integrated heaters. Using this effect, we achieve fast turn-on/off of a χ ( 3 ) degenerate optical parametric oscillator (DOPO) and on-chip true random number generation. Our approach allows us to overcome the Q -limited generation rate of a single-ring-based DOPO and offers a path toward the development of a scalable integrated high-quality entropy source for modern cryptographic systems.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 09, 2021
- Source ID
- 10.1364/optica.433102
Entities
People
- Alexander L. Gaeta
- Bok Young Kim
- Michal Lipson
- Xingchen Ji
- Yoshitomo Okawachi
- Yun Zhao
Organizations
- Air Force Office of Scientific Research
- Army Research Office
- Columbia University
- National Science Foundation
- Semiconductor Research Corporation