Abstract
We describe a near-field optical microscopy technique based on the interaction of a probe molecule with the sample surface (e.g., with a flat metal surface) in the field of external optical radiation and consider the spontaneous Raman scattering characterized, in the presence of a metal surface, by the effective polarizability of the probe molecule, depending on the frequency and the distance to the sample surface. At certain distances from the probe molecule to the surface, the effective polarizability of this molecule (determined with allowance for the polarizing influence of the surface of a semi-infinite medium) at the Stokes frequency sharply increases in comparison to the quantum polarizability of an isolated molecule, which is indicative of the formation of optical near-field resonances. It is shown that the proposed method of near-field optical microscopy is characterized by high sensitivity and high spatial resolution (on the order of 1 Å).
Similar content being viewed by others
References
Surface Enhanced Raman Scattering, Ed. by R. K. Chang and T. E. Furtak (Plenum, New York, 1982).
S. K. Sekatskii and V. S. Letokhov, Pis’ma Zh. Éksp. Teor. Fiz. 63, 311 (1996) [JETP Lett. 63, 319 (1996)].
J. Michaels, C. Hettich, J. Mynek, and V. Sandoghdar, Nature 405, 325 (2000).
O. N. Gadomskii and K. Yu. Moiseev, Zh. Prikl. Spektrosk. 68, 526 (2001).
O. N. Gadomskii and K. Yu. Moiseev, Opt. Spektrosk. 93, 163 (2002) [Opt. Spectrosc. 93, 153 (2002)].
O. N. Gadomskii, Usp. Fiz. Nauk 170, 1145 (2000) [Phys. Usp. 43, 1071 (2000)].
A. S. Davydov, Quantum Mechanics (Nauka, Moscow, 1963; Pergamon, Oxford, 1976).
O. N. Gadomskii and A. S. Kadochkin, Zh. Éksp. Teor. Fiz. 124, 516 (2003) [JETP 97, 466 (2003)].
Author information
Authors and Affiliations
Additional information
__________
Translated from Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 80, No. 3, 2004, pp. 179–183.
Original Russian Text Copyright © 2004 by Gorelik, Gadomsky, Kunitsyn.