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Brillouin Study of the Quantization of Acoustic Modes in Nanospheres

M. H. Kuok, H. S. Lim, S. C. Ng, N. N. Liu, and Z. K. Wang
Phys. Rev. Lett. 90, 255502 – Published 24 June 2003; Erratum Phys. Rev. Lett. 91, 149901 (2003)
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Abstract

The vibrational modes in three-dimensional ordered arrays of unembedded SiO2 nanospheres have been studied by Brillouin light scattering. Multiple distinct Brillouin peaks are observed whose frequencies are found to be inversely proportional to the diameter (200340nm) of the nanospheres, in agreement with Lamb’s theory. This is the first Brillouin observation of acoustic mode quantization in a nanoparticle arising from spatial confinement. The distinct spectral peaks measured afford an unambiguous assignment of seven surface and inner acoustic modes. Interestingly, the relative intensities and polarization dependence of the Brillouin spectrum do not agree with the predictions made for Raman scattering.

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  • Received 3 January 2003

DOI:https://doi.org/10.1103/PhysRevLett.90.255502

©2003 American Physical Society

Erratum

Erratum: Brillouin Study of the Quantization of Acoustic Modes in Nanospheres [Phys. Rev. Lett. 90, 255502 (2003)]

M. H. Kuok, H. S. Lim, S. C. Ng, N. N. Liu, and Z. K. Wang
Phys. Rev. Lett. 91, 149901 (2003)

Authors & Affiliations

M. H. Kuok*, H. S. Lim, S. C. Ng, N. N. Liu, and Z. K. Wang

  • Department of Physics, National University of Singapore, Singapore 117542, Republic of Singapore

  • *Corresponding author. Email address: phykmh@nus.edu.sg

See Also

Music of the Spheres

David Lindley
Phys. Rev. Focus 11, 29 (2003)

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Issue

Vol. 90, Iss. 25 — 27 June 2003

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