17 000%/W second-harmonic conversion efficiency in single-crystalline aluminum nitride microresonators
Abstract
High quality factor optical microcavities have been employed in a variety of material systems to enhance nonlinear optical interactions. While single-crystalline aluminum nitride microresonators have recently emerged as a low loss platform for integrated nonlinear optics such as four wave mixing and Raman lasing, few studies have investigated this material for second-harmonic generation. In this letter, we demonstrate an optimized fabrication of dually resonant phase-matched ring resonators from epitaxial aluminum nitride thin films. An unprecendented second-harmonic generation efficiency of 17 000%/W is obtained in the low power regime, and pump depletion is observed at a relatively low input power of 3.5 mW. This poses epitaxial aluminum nitride as the highest efficiency second-harmonic generator among current integrated platforms.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 24, 2018
- Source ID
- 10.1063/1.5042506
Entities
People
- Alexander W. Bruch
- Hong X Tang
- Jianchang Yan
- Joshua B Surya
- Junxi Wang
- Liang Zhang
- Xiang Guo
- Xianwen Liu
- Zheng Gong
Organizations
- Air Force Office of Scientific Research
- Army Research Office
- Chinese Academy of Sciences
- Defense Advanced Research Projects Agency
- National Science Foundation
- Yale University