High reflectivity grating waveguide coatings for 1064 nm

Bunkowski, Alexander; Burmeister, Oliver; Friedrich, Daniel; Danzmann, Karsten; Schnabel, Roman

doi:10.1088/0264-9381/23/24/007

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High reflectivity grating waveguide coatings for 1064 nm

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Bunkowski, Alexander
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;
AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

Burmeister, Oliver
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;
AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Friedrich, Daniel
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Danzmann, Karsten
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Schnabel, Roman
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Citation

Bunkowski, A., Burmeister, O., Friedrich, D., Danzmann, K., & Schnabel, R. (2006). High reflectivity grating waveguide coatings for 1064 nm. Classical and Quantum Gravity, 23(24), 7297-7303. doi:10.1088/0264-9381/23/24/007.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-4A57-A

Abstract

We propose thin single-layer grating waveguide structures to be used as high reflectivity, but low thermal noise, alternative to conventional coatings for gravitational wave detector test mass mirrors. Grating waveguide (GWG) coatings can show a reflectivity of up to 100% with an overall thickness of less than a wavelength. We theoretically investigate GWG coatings for 1064 nm based on tantala (Ta2O5) on a silica substrate focusing on broad spectral response and low thickness.