Calculated Raman Spectra for LIGO’s Coating Amorphous Oxides
ORAL
Abstract
We calculate Raman spectra from a density functional approach for several amorphous oxides that are candidate optical coating materials for gravitational wave detection interferometers. The model amorphous systems are prepared by fitting the experimental radial distribution function using reverse Monte Carlo combined with melt-quench. Each model is about 360 atoms in size. Different approaches to eliminate spurious crystalline phonon modes due to finite supercell size are compared. The calculated Raman spectra are in reasonable agreement with the experimentally determined ones.
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Presenters
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Rui Zhang
University of Florida
Authors
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Rui Zhang
University of Florida
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Jun Jiang
University of Florida, Department of Physics, Center for Molecular Magnetic Quantum Materials and Quantum Theory Project, University of Florida
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Alec Mishkin
University of Florida
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Maher Yazback
University of Florida
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Kiran Prasai
Stanford University
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Riccardo Bassiri
Stanford University
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Martin M Fejer
Stanford University, E. L. Ginzton Laboratory, Stanford University
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Hai-Ping Cheng
University of Florida, Department of Physics, Center for Molecular Magnetic Quantum Materials and Quantum Theory Project, University of Florida, Department of Physics, University of Florida, Physics, University of Florida