Issue |
Europhys. Lett.
Volume 69, Number 1, January 2005
|
|
---|---|---|
Page(s) | 61 - 67 | |
Section | Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics | |
DOI | https://doi.org/10.1209/epl/i2004-10301-8 | |
Published online | 08 December 2004 |
Resonant effects in optical second-harmonic generation from
alkali covered 
1
Natural Sciences Center, A. M. Prokhorov General Physics Institute Russian Academy of Sciences - 119991 Moscow, Russia
2
Laser Laboratorium Göttingen e.V. - Hans-Adolf-Krebs-Weg 1 D-37077 Göttingen, Germany
3
Optical Engineering Department, Xian Institute of Technology - Xian, PRC
4
Fysisk Institut, Syddansk Universitet - DK-5230 Odense M, Denmark
Corresponding author: rubahn@fysik.sdu.dk
Received:
26
May
2004
Accepted:
26
October
2004
Polarized second-harmonic generation (SHG) coverage dependencies
for alkali () adsorption on
both at room and at low temperatures are obtained for fundamental
wavelengths of 497
, 570
and 1067
, showing
characteristic and reproducible non-monotonic changes of SHG
efficiency. At submonolayer coverage the SHG intensities are
qualitatively different for visible vs. near-resonant IR
radiation. In the coverage regime
, low-symmetry
-
bonds, resulting from a
-induced surface
reconstruction, are formed, which are resonant with 1067
radiation. By comparing parallelly and perpendicularly polarized
coverage dependencies, we deduce that the resonant contribution in
the parallel configuration is due to the
-component.
PACS: 42.65.-k – Nonlinear optics / 78.20.-e – Optical properties of bulk materials and thin films / 78.66.-w – Optical properties of specific thin films
© EDP Sciences, 2005
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