1. 17 000%/W second-harmonic conversion efficiency in single-crystalline aluminum nitride microresonators
- Author
-
Alexander W. Bruch, Joshua B. Surya, Jianchang Yan, Liang Zhang, Hong X. Tang, Zheng Gong, Junxi Wang, Xiang Guo, and Xianwen Liu
- Subjects
Fabrication ,Materials science ,Physics and Astronomy (miscellaneous) ,FOS: Physical sciences ,Physics::Optics ,Applied Physics (physics.app-ph) ,02 engineering and technology ,Nitride ,01 natural sciences ,010309 optics ,Condensed Matter::Materials Science ,Four-wave mixing ,Resonator ,0103 physical sciences ,Thin film ,business.industry ,Energy conversion efficiency ,Nonlinear optics ,Physics - Applied Physics ,021001 nanoscience & nanotechnology ,Optoelectronics ,0210 nano-technology ,business ,Lasing threshold ,Optics (physics.optics) ,Physics - Optics - 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.
- Published
- 2018