Abstract
Hexagonal boron nitride (hBN) is a wide bandgap van der Waals material that is emerging as a powerful platform for quantum optics and nanophotonics. In this work, we demonstrate whispering gallery mode silica microresonators hybridized with thin layers of hBN that exhibit high intrinsic optical quality factor >7 × 105 and a linear absorption coefficient of 9.5 cm-1. Measurements of the effect of hBN thickness on optical Q and comparison with a theoretical model allows the linear optical absorption coefficient of the hBN films to be estimated. These high-Q devices will be useful for applications in quantum and nonlinear optics, and their hybridized geometry provides a sensitive platform for evaluating losses in hBN and other 2D materials.
Original language | English |
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Pages (from-to) | 3027-3033 |
Number of pages | 7 |
Journal | ACS Photonics |
Volume | 8 |
Issue number | 10 |
DOIs | |
Publication status | Published - 2021 Oct 20 |
Bibliographical note
Publisher Copyright:© 2021 American Chemical Society.
Keywords
- 2D material
- chemical vapor deposition
- hybrid devices
- nanophotonics
- optical absorption
- resonators
- whispering gallery mode
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Biotechnology
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering