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Characterization of nonlinear optical superlattices by means of ω‐k spectroscopy
Author(s) -
Kitaeva G. Kh.,
Tishkova V. V.,
Penin A. N.
Publication year - 2005
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1292
Subject(s) - harmonics , parametric statistics , fibonacci number , fourier transform , characterization (materials science) , second harmonic generation , optics , superlattice , nonlinear system , signal (programming language) , physics , high harmonic generation , nonlinear optics , phase (matter) , mathematics , condensed matter physics , laser , quantum mechanics , statistics , discrete mathematics , voltage , computer science , programming language
A method for measuring the spatial profiles of the second‐order non‐linear susceptibility χ (2) ( z ) in the bulk of periodically poled crystals and other structures was developed. The method is based on the general relation between the Fourier harmonics of χ (2) ( z ) and the parametric signal lineshape in the ω− k space which is governed by the dependence of the output signal intensity on the phase mismatch. The special cases of non‐linear interferometers, periodically poled crystals with stepwise or smoothed space χ (2) ( z ) profiles and Fibonacci‐type non‐linear superlattices were considered. Experimental schemes based on spontaneous parametric down‐conversion and the second harmonic generation were compared and discussed. Copyright © 2005 John Wiley & Sons, Ltd.