Open AccessFour wave mixing at air-dielectric interfaces with a femtosecond laser excitation
Author(s) -
Ravi Kumar,
Sunita Singh,
D. Narayana Rao
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.018034
Subject(s) - femtosecond , optics , four wave mixing , materials science , mixing (physics) , dielectric , signal (programming language) , laser , excitation , optoelectronics , nonlinear optics , physics , quantum mechanics , computer science , programming language
In this article we report our experimental results on non collinear four-wave mixing (FWM) at air-dielectric interfaces. We generated FWM signal from the two interfaces of a 1mm thick fused silica slide with air using two 800 nm, 100 fs pump pulses in non-collinear pump-probe type geometry. We observe that there is a maximum peak shift of approximately 1.5 nm in FWM signals corresponding to the two interfaces of the same silica slide. Further, we find that the intensity of FWM signal observed at air to silica interface is less than that from silica to air interface. We briefly elaborate on this observation with systematic study of FWM in fused silica.