Journal ArticleDOI
Tenfold reduction of Brownian noise in high-reflectivity optical coatings
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TLDR
In this article, direct-bonded monocrystalline multilayers are used for optical interferometry, which exhibit both intrinsically low mechanical loss and high optical quality.Abstract:
Thermally induced fluctuations impose a fundamental limit on precision measurement. In optical interferometry, the current bounds of stability and sensitivity are dictated by the excess mechanical damping of the high-reflectivity coatings that comprise the cavity end mirrors. Over the last decade, the dissipation of these amorphous multilayer reflectors has at best been reduced by a factor of two. Here, we demonstrate a new paradigm in optical coating technology based on directbonded monocrystalline multilayers, which exhibit both intrinsically low mechanical loss and high optical quality.read more
Citations
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Reduction of absorption losses in MOVPE-grown AlGaAs Bragg mirrors.
TL;DR: It is found that compensation of the carbon acceptors by intentional doping enables MOVPE-derived multilayer mirrors with the potential for a high cavity finesse approaching the performance levels found with Bragg mirrors grown by molecular beam epitaxy (MBE).
Journal ArticleDOI
Ultra-stable 1064-nm neodymium-doped yttrium aluminum garnet lasers with 2.5 × 10−16 frequency instability
TL;DR: In this paper, the authors developed two ultra-stable systems based on 1064-nm neodymium-doped yttrium aluminum garnet lasers and 20-cm optical cavities.
Journal ArticleDOI
Cryogenic optomechanic cavity in low mechanical loss material
Jérémy Bon,Leonhard Neuhaus,Samuel Deléglise,Tristan Briant,Philippe Abbé,Pierre-François Cohadon,Serge Galliou +6 more
TL;DR: In this paper, it is shown that the mechanical displacement can be actuated optically by radiation pressure according to proper designs, while highlighting the major assets of each option and showing some preliminary results, including tests on quartz and CaF2 samples.
Journal ArticleDOI
Structural evolution of binary oxide nanolaminates with annealing and its impact on room-temperature internal friction
Le Yang,Mariana Fazio,G. Vajente,Alena Ananyeva,G. Billingsley,A. S. Markosyan,Riccardo Bassiri,Martin M. Fejer,Carmen S. Menoni +8 more
TL;DR: In this article, the morphological changes SiO2/Ta2O5 and TiO 2/Ta 2O5 nanolaminates undergo with annealing and their impact on room temperature internal friction was investigated.
Journal ArticleDOI
Reconstruction of Bloch wavefunctions of holes in a semiconductor.
TL;DR: In this paper, the authors reconstructed low-energy Bloch wavefunctions of two types of hole in gallium arsenide at wavelengths much longer than the spacing between atoms by experimentally measuring sideband polarizations and introducing an elegant theory that ties those polarizations to quantum interference between different recollision pathways.
References
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Journal ArticleDOI
Irreversibility and Generalized Noise
TL;DR: In this article, a relation between the generalized resistance and the generalized forces in linear dissipative systems is obtained, which forms the extension of the Nyquist relation for the voltage fluctuations in electrical impedances.
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LIGO: The Laser Interferometer Gravitational-Wave Observatory.
Alex Abramovici,W. E. Althouse,R. W. P. Drever,Yekta Gursel,Seiji Kawamura,F. J. Raab,David H. Shoemaker,L. Sievers,Robert Spero,Kip S. Thorne,R. E. Vogt,Rainer Weiss,S. E. Whitcomb,Michael E Zucker +13 more
TL;DR: The goal of the Laser Interferometer Gravitational-Wave Observatory (LIGO) Project is to detect and study astrophysical gravitational waves and use data from them for research in physics and astronomy.
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Frequency Ratio of Al+ and Hg+ Single-Ion Optical Clocks; Metrology at the 17th Decimal Place
Till Rosenband,David Hume,Piet O. Schmidt,Chin-Wen Chou,A. Brusch,Luca Lorini,Windell H. Oskay,Robert E. Drullinger,Tara M. Fortier,Jason Stalnaker,Scott A. Diddams,William C. Swann,Nathan R. Newbury,Wayne M. Itano,David J. Wineland,J. C. Bergquist +15 more
TL;DR: Repeated measurements during the past year yield a preliminary constraint on the temporal variation of the fine-structure constant α of α ofbatchmode, a regime of operation for atomic clocks based on optical transitions, promising even higher performance.
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LIGO: The Laser Interferometer Gravitational-Wave Observatory
TL;DR: Laser Interferometric Gravitational-Wave Observatory (LIGO) as discussed by the authors is a project to detect and study gravitational waves of astrophysical origin, which holds the promise of testing general relativity in the strong-field regime, providing a new probe of exotic objects such as black hole and neutron stars, and uncovering unanticipated new astrophysics.
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LIGO: The laser interferometer gravitational-wave observatory
TL;DR: LIGO as discussed by the authors is a trio of extremely sensitive Michelson interferometers built to detect gravitational waves from space, and the results of their recent observations are described in detail.