The far infrared optical constants of GaP |
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| Affiliation: | 1. Research Service, James A. Haley Veterans’ Hospital and Clinics, Tampa, FL;2. Department of Anthropology, University of South Florida, Tampa, FL;3. Mental Health & Behavioral Sciences Section, James A. Haley Veterans’ Hospital and Clinics, Tampa, FL;4. Defense Health Agency, Traumatic Brain Injury Center of Excellence, James A. Haley Veterans Hospital, Tampa, FL;5. Department of Internal Medicine, University of South Florida, Tampa, FL;6. Department of Psychiatry and Behavioral Neurosciences, University of South Florida, Tampa, FL;7. Department of Psychology, University of South Florida, Tampa, FL;8. Physical Medicine and Rehabilitation, Indiana University School of Medicine, Indianapolis, IN;9. Rehabilitation Hospital of Indiana, Indianapolis, IN;10. Department of Physical Medicine, University of Michigan, Ann Arbor, MI;11. Department of Rehabilitation and Surgery, University of Michigan, Ann Arbor, MI;12. Extended Care & Rehabilitation, Minneapolis VA Health Care System, Minneapolis, MN;13. Department of Psychiatry, University of Minnesota–Twin Cities, Minneapolis, MN;14. Department of Veterans Affairs Palo Alto Health Care System, Palo Alto, CA;15. Department of Rehabilitation Medicine, University of Washington School of Medicine, Seattle, WA, USA |
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| Abstract: | The FIR optical constants of GaP have been determined on either side of the Reststrahlen band by single pass transmission dispersive Fourier transform spectroscopy. These results extend the range of measured refractive index data for GaP, and reveal the dispersion in the refractive index in regions of weak absorption. Features in the spectrum are assigned as phonon combination bands with the aid of a critical point analysis based on phonon frequencies calculated using an 11-parameter rigid ion model. |
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