Coherent Cancellation of Photothermal Noise in GaAs/Al_(0.92)Ga_(0.08)As Bragg Mirrors
Abstract
Thermal noise is a limiting factor in many high-precision optical experiments. A search is underway for novel optical materials with reduced thermal noise. One such pair of materials, gallium arsenide and aluminum-alloyed gallium arsenide (collectively referred to as AlGaAs), shows promise for its low Brownian noise when compared to conventional materials such as silica and tantala. However, AlGaAs has the potential to produce a high level of thermo-optic noise. We have fabricated a set of AlGaAs crystalline coatings, transferred to fused silica substrates, whose layer structure has been optimized to reduce thermo-optic noise by inducing coherent cancellation of the thermoelastic and thermorefractive effects. By measuring the photothermal transfer function of these mirrors, we find evidence that this optimization has been successful.
Additional Information
© 2016 IOP Publishing. Received 29 November 2015. Accepted 11 January 2016. Published 9 March 2016. We gratefully acknowledge the informative discussions we have had regarding thermal noise with the Optics and Advanced Interferometer working groups of the LIGO Scientific Collaboration. In particular, we appreciate the input from Yuri Levin, Matthew Evans, Johannes Eichholz, Andri Gretarsson, and Kazuhiro Yamamoto. TC, EDH, FS, KA, EKG, and RXA acknowledge support from the National Science Foundation under PHY-0757058. GDC acknowledges support from EURAMET/EMRP (QESOCAS). GDC and MA acknowledge support by the Austrian Science Fund (FWF) through project AI0090921. A portion of this work was performed in the UCSB Nanofabrication Facility. RXA gratefully acknowledges funding provided by the Institute for Quantum Information and Matter, an NSF Physics Frontiers Center with support of the Gordon and Betty Moore Foundation. JRS is supported by NSF award PHY-1255650. This article has the internal project designation LIGO-P1500054.Attached Files
Submitted - 1506.07088v1.pdf
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Additional details
- Alternative title
- Coherent Cancellation of Photothermal Noise in GaAs/Al0.92Ga0.08As Bragg Mirrors
- Eprint ID
- 60738
- Resolver ID
- CaltechAUTHORS:20151005-083221064
- PHY-0757058
- NSF
- QESOCAS
- European Association of National Metrology Institute (EURAMET)
- AI0090921
- FWF Der Wissenschaftsfonds
- Institute for Quantum Information and Matter (IQIM)
- NSF Physics Frontiers Center
- Gordon and Betty Moore Foundation
- PHY-1255650
- NSF
- Created
-
2015-10-05Created from EPrint's datestamp field
- Updated
-
2022-07-12Created from EPrint's last_modified field
- Caltech groups
- Institute for Quantum Information and Matter
- Other Numbering System Name
- LIGO Document
- Other Numbering System Identifier
- LIGO-P1500054