KUMAR, Sunil; KAMARAJU, N.; KARTHIKEYAN, B.; TONDUSSON, Marc; FREYSZ, Eric; SOOD, A. K.

doi:10.1063/1.3456372

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KUMAR, Sunil
Department of Physics
Center for Ultrafast Laser Applications

KAMARAJU, N.
Department of Physics
Center for Ultrafast Laser Applications

KARTHIKEYAN, B.
Department of Physics

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Journal of Chemical Physics. 2010, vol. 133, n° 1, p. 014502 (1-4)

American Institute of Physics

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Terahertz time domain spectroscopy has been used to study low frequency confined acoustic phonons of silver nanoparticles embedded in poly(vinyl alcohol) matrix in the spectral range of 0.1 to 2.5 THz. The real and imaginary parts of the dielectric function show two bands at 0.60 THz and 2.12 THz attributed to the spheroidal and toroidal modes of silver nanoparticles, thus demonstrating the usefulness of terahertz time domain spectroscopy as a complementary technique to Raman spectroscopy in characterizing the nanoparticles.< Leer menos

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Direct observation of low frequency confined acoustic phonons in silver nanoparticles: Terahertz time domain spectroscopy

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