Coherent cancellation of photothermal noise in GaAs/Al0.92Ga0.08As Bragg mirrors
- Author(s)
- Tara Chalermsongsak, Evan D. Hall, Garrett D. Cole, David Follman, Frank Seifert, Koji Arai, Eric K. Gustafson, Joshua R. Smith, Markus Aspelmeyer, Rana X. Adhikari
- 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.
- Organisation(s)
- Quantum Optics, Quantum Nanophysics and Quantum Information
- External organisation(s)
- California Institute of Technology (Caltech), Thorlabs Inc., National Institute of Standards and Technology, Gaithersburg, University of Maryland, College Park, California State University, Fullerton, Crystalline Mirror Solutions GmbH
- Journal
- Metrologia: international journal of pure and applied metrology
- Volume
- 53
- Pages
- 860-868
- No. of pages
- 9
- ISSN
- 0026-1394
- DOI
- https://doi.org/10.1088/0026-1394/53/2/860
- Publication date
- 03-2016
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103021 Optics
- Keywords
- ASJC Scopus subject areas
- General Engineering
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/d3d7c27b-f591-494e-ba39-f347fe6210c3