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Second order nonlinear susceptibility coefficients of porous semiconducting compounds
Author(s) -
Monecke J.,
Bezrukova J.,
Cordts W.,
Richardson G.
Publication year - 2004
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200309027
Subject(s) - nonlinear system , fractal , bounded function , electric field , porous medium , semiconductor , order (exchange) , porosity , materials science , condensed matter physics , field (mathematics) , second harmonic generation , harmonic , physics , mathematics , mathematical analysis , pure mathematics , optics , quantum mechanics , optoelectronics , composite material , laser , finance , economics
It is proven that effective second order nonlinear susceptibility coefficients of porous semiconductors, responsible for second harmonic generation, are not bounded and can be enhanced compared to those of the bulk material. The proof is based on an effective medium theory for a special fractal structure, large electric fields between nearly touching pores resulting in an enhancement of higher order field fluctuations. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)