Substrate-transferred GaAs/AlGaAs crystalline coatings for gravitational-wave detectors

Cole, G. D.; Ballmer, S. W.; Billingsley, G.; Catano-Lopez, S. B.; Fejer, M.; Fritschel, P.; Gretarsson, A. M.; Harry, G. M.; Kedar, Dhruv; Legero, Thomas; Makarem, C.; Penn, S. D.; Reitze, D. H.; Steinlechner, J.; Sterr, Uwe; Tanioka, S.; Truong, G.-W.; Ye, Jun; Yu, Jialiang

doi:https://doi.org/10.1063/5.0140663

Zugriffsnummer	50728
Dokumenttyp	Zeitschriftenartikel
Peer Review	mit Peer Review
Sprache	Englisch
Titel	Substrate-transferred GaAs/AlGaAs crystalline coatings for gravitational-wave detectors
Autor(in); Institution	Cole, G. D.; Thorlabs Crystalline Solutions, Santa Barbara, CA, USA Ballmer, S. W.; Syracuse University, Department of Physics, Syracuse, NY, USA Billingsley, G.; LIGO Laboratory, California Institute of Technology, Pasadena, CA, USA Catano-Lopez, S. B.; Thorlabs Crystalline Solutions, Santa Barbara, CA, USA Fejer, M.; Stanford University, Palo Alto, CA, USA Fritschel, P.; LIGO Laboratory, Massachusetts Institute of Technology, Cambridge, MA, USA Gretarsson, A. M.; Embry-Riddle Aeronautical University, Department of Physics, Prescott, AZ, USA Harry, G. M.; American University, Department of Physics, Washington, DC, USA Kedar, Dhruv; JILA, National Institute of Standards and Technology and University of Colorado, Boulder, CO, USA Legero, Thomas; 4.3, Quantenoptik und Längeneinheit, PTB-Braunschweig Makarem, C.; LIGO Laboratory, California Institute of Technology, Pasadena, CA, USA Penn, S. D.; Hobart and William Smith Colleges, Department of Physics, Geneva, NY, USA Reitze, D. H.; LIGO Laboratory, California Institute of Technology, Pasadena, CA, USA Steinlechner, J.; Maastricht University, Maastricht, THE NETHERLANDS; Nikhef, Amsterdam, THE NETHERLANDS Sterr, Uwe; 4.3, Quantenoptik und Längeneinheit, PTB-Braunschweig Tanioka, S.; Syracuse University, Department of Physics, Syracuse, NY, USA Truong, G.-W.; Thorlabs Crystalline Solutions, Santa Barbara, CA, USA Ye, Jun; JILA, National Institute of Standards and Technology and University of Colorado, Boulder, CO, USA Yu, Jialiang; QUEST, FG 2, Quantenuhren und komplexe Systeme, PTB-Braunschweig
Quelle/Jahr	Applied Physics Letters: 122 (2023), 110502-1 - 110502-8
Artikelnummer	110502
ISSN	0003-6951 (print) ; 1077-3118 (online)
DOI	https://doi.org/10.1063/5.0140663
Verlag	Melville, NY: American Institute of Physics (AIP)
Zusammenfassung	In this Perspective, we summarize the status of technological development for large-area and low-noise substrate-transferred GaAs/AlGaAs (AlGaAs) crystalline coatings for interferometric gravitational-wave (GW) detectors. These topics were originally presented as part of an AlGaAs Workshop held at American University, Washington, DC, from 15 August to 17 August 2022, bringing together members of the GW community from the laser interferometer gravitational-wave observatory (LIGO), Virgo, and KAGRA collaborations, along with scientists from the precision optical metrology community, and industry partners with extensive expertise in the manufacturing of said coatings. AlGaAs-based crystalline coatings present the possibility of GW observatories having significantly greater range than current systems employing ion-beam sputtered mirrors. Given the low thermal noise of AlGaAs at room temperature, GW detectors could realize these significant sensitivity gains while potentially avoiding cryogenic operation. However, the development of large-area AlGaAs coatings presents unique challenges. Herein, we describe recent research and development efforts relevant to crystalline coatings, covering characterization efforts on novel noise processes as well as optical metrology on large-area (~ 10 cm diameter) mirrors. We further explore options to expand the maximum coating diameter to 20 cm and beyond, forging a path to produce low-noise mirrors amenable to future GW detector upgrades, while noting the unique requirements and prospective experimental testbeds for these semiconductor-based coatings.

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Cole, G. D., Ballmer, S. W., Billingsley, G., Catano-Lopez, S. B., Fejer, M., Fritschel, P., Gretarsson, A. M., Harry, G. M., Kedar, D., Legero, T., Makarem, C., Penn, S. D., Reitze, D. H., Steinlechner, J., Sterr, U., Tanioka, S., Truong, G.-W., Ye, J., & Yu, J. (2023). Substrate-transferred GaAs/AlGaAs crystalline coatings for gravitational-wave detectors. Applied Physics Letters, 122, 110502-1–110502-8. https://doi.org/10.1063/5.0140663

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