Open AccessHigh precision integrated photonic thermometry enabled by a transfer printed diamond resonator on GaN waveguide chip
Author(s) -
Jack A. Smith,
Paul Hill,
Charalambos Klitis,
L. M. Weituschat,
P. A. Postigo,
Marc Sorel,
Martin D. Dawson,
Michael J. Strain
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.433607
Subject(s) - materials science , resonator , diamond , optoelectronics , gallium nitride , sapphire , optics , photonic crystal , photonics , transfer printing , silicon nitride , waveguide , chip , thermometer , silicon , laser , nanotechnology , physics , telecommunications , computer science , layer (electronics) , composite material , quantum mechanics
We demonstrate a dual-material integrated photonic thermometer, fabricated by high accuracy micro-transfer printing. A freestanding diamond micro-disk resonator is printed in close proximity to a gallium nitride on a sapphire racetrack resonator, and respective loaded Q factors of 9.1 × 10 4 and 2.9 × 10 4 are measured. We show that by using two independent wide-bandgap materials, tracking the thermally induced shifts in multiple resonances, and using optimized curve fitting tools the measurement error can be reduced to 9.2 mK. Finally, for the GaN, in a continuous acquisition measurement we record an improvement in minimum Allan variance, occurring at an averaging time four times greater than a comparative silicon device, indicating better performance over longer time scales.