Phys. Rev. Lett. 64, 2394–2397 (1990)1/f phonon-number fluctuations in quartz observed by laser light scatteringReceived 15 February 1990; published in the issue dated 14 May 1990 The energy of each phonon mode is fluctuating around its equilibrium value, and its power spectral density was derived with a quartz specimen which was illuminated by a laser light. Fluctuations of the Brillouin scattered light intensity were measured by means of the photon-counting technique. The power spectral density has been derived to be 8×10-5/f per phonon mode provided that phonon-number fluctuations are independent from mode to mode. © 1990 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.64.2394
DOI:
10.1103/PhysRevLett.64.2394
PACS:
63.70.+h, 05.40.+j, 63.20.-e, 78.35.+c
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