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APS » Journals » Phys. Rev. B » Volume 62 » Issue 8
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Phys. Rev. B 62, 5168–5173 (2000)

Surface-enhanced Raman scattering at cryogenic substrate temperatures

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R. Chang1, P. T. Leung1,2,*, S. H. Lin1, and W. S. Tse2
1Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan 106, Republic of China
2Institute of Physics, Academia Sinica, Taipei, Taiwan 115, Republic of China

Received 16 November 1999; revised 18 April 2000; published in the issue dated 15 August 2000

The recent speculation on the possibility of achieving gigantic enhancement for surface-enhanced Raman scattering at cryogenic substrate temperatures is examined using a simple theoretical model. The surface-plasmon enhancement mechanism is modeled using the Fermi-electron gas approach instead of the Drude model as used previously in the literature. Due to the diminution of substrate polarizability from quantum effects, it is concluded that dramatic enhancement is unlikely to be achieved by just cooling the surface to such low temperatures.

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.62.5168
DOI:
10.1103/PhysRevB.62.5168
PACS:
73.20.Mf, 82.65.Pa, 82.80.Ch

*Corresponding author at permanent address: Department of Physics, Portland State University, P.O. Box 751, Portland, OR 97207-0751.

 
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