Second-harmonic generation from individual surface defects under local excitation

Anatoly V. Zayats; Thomas Kalkbrenner; Vahid Sandoghdar; Jürgen Mlynek

doi:10.1103/PhysRevB.61.4545

Second-harmonic generation from individual surface defects under local excitation

Anatoly V. Zayats, Thomas Kalkbrenner, Vahid Sandoghdar, and Jürgen Mlynek

Phys. Rev. B 61, 4545 – Published 15 February 2000

Abstract

Enhancement of optical second-harmonic generation (SHG) at individual defects on metal surface has been studied. SHG has been excited locally at chosen defects using a near-field optical microscope with an uncoated fiber tip. SH intensity enhancement up to ten times has been observed at the apex of micron size defects on a gold surface while the average enhancement is of about 1.2 times. Observed SHG enhancement has been described by lightning rod effect. Specific features of SHG enhancement due to local excitation are briefly discussed.

Received 17 August 1999

DOI:https://doi.org/10.1103/PhysRevB.61.4545

Authors & Affiliations

Anatoly V. Zayats^*, Thomas Kalkbrenner, Vahid Sandoghdar, and Jürgen Mlynek

Physics Department, University of Konstanz, Fach M696, D-78457, Konstanz, Germany

^*Author to whom correspondence should be addressed. Present address: Department of Pure and Applied Physics, The Queen’s University of Belfast, Belfast BT7 1NN, United Kingdom. Electronic address: a.zayats@qub.ac.uk

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Vol. 61, Iss. 7 — 15 February 2000

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Physical Review B

covering condensed matter and materials physics