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.

*This work is supported by the NSF through grants PHY-1707870 and PHY-1404110.

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Presenters

  • Rui Zhang

    • University of Florida

Authors

  • Rui Zhang

    • University of Florida

  • Jun Jiang

    • University of Florida
    • Department of Physics, Center for Molecular Magnetic Quantum Materials and Quantum Theory Project, University of Florida

  • Alec Mishkin

    • University of Florida

  • Maher Yazback

    • University of Florida

  • Kiran Prasai

    • Stanford University

  • Riccardo Bassiri

    • Stanford University

  • Martin M Fejer

    • Stanford University
    • E. L. Ginzton Laboratory, Stanford University

  • 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