Eliminating the broadening by finite aperture in Brillouin spectroscopy

Details Eliminating the broadening by finite aperture in Brillouin spectroscopy Eliminating the broadening by finite aperture in Brillouin spectroscopy

2011-09-16

arxiv.org/abs/1109.3531v1

Rev. Sci. Instrum. 82, 113110 (2011)

Physics

Condensed Matter

Materials Science

14 pages, 8 figures

Scientific paper

10.1063/1.3663072

We present a new optical arrangement which allows to avoid the broadening by finite aperture in Brillouin spectroscopy. In this system, all the rays scattered at the same angle by the whole scattering volume are collected on a single pixel of the area detector. This allows to use large collection angles, increasing the luminosity without lowering the accuracy of the frequency-shift and linewidth measurements. Several results of experimental checks are provided, showing the efficiency of the device.

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