期刊
OPTICS EXPRESS
卷 24, 期 1, 页码 319-328出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.24.000319
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资金
- U.S. National Institutes of Health [R01-EY025454, P41-EB015903, UL1-RR025758, R21EY023043, K25EB015885]
- National Science Foundation [CBET-1264356]
- National Research Foundation of Korea [2013R1A1A2062808]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1264356] Funding Source: National Science Foundation
- National Research Foundation of Korea [2013R1A1A2062808] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Brillouin spectroscopy has been used to characterize shear acoustic phonons in materials. However, conventional instruments had slow acquisition times over 10 min per 1 mW of input optical power, and they required two objective lenses to form a 90 degrees scattering geometry necessary for polarization coupling by shear phonons. Here, we demonstrate a confocal Brillouin microscope capable of detecting both shear and longitudinal phonons with improved speeds and with a single objective lens. Brillouin scattering spectra were measured from polycarbonate, fused quartz, and borosilicate in 1-10 s at an optical power level of 10 mW. The elastic constants, phonon mean free path and the ratio of the Pockels coefficients were determined at microscopic resolution. (C) 2016 Optical Society of America
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