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Nonlinear optics with ZnO nanowires
Author(s) -
Voss Tobias,
Kudyk Iryna,
Wischmeier Lars,
Gutowski Jürgen
Publication year - 2009
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.200880307
Subject(s) - nanowire , femtosecond , photoluminescence , materials science , excitation , optoelectronics , second harmonic generation , laser , excited state , nonlinear optics , optics , atomic physics , physics , quantum mechanics
Second‐harmonic generation and two‐photon induced photoluminescence from arrays of ZnO nanowires and single nanowires under excitation with femtosecond pulses is experimentally studied. The ratio of relevant components of the nonlinear χ (2) tensor is obtained. The excitation of the nanowire array with femtosecond laser pulses induces significant heating of the free‐standing nanowires. The heat distribution is analyzed in phenomenological finite‐element studies. Two‐photon excitation of a broad internal photoluminescence in single ZnO nanowires is used to perform a single‐nanowire transmission experiment. From the transmitted intensity, the band‐gap shift in the excited nanowire is obtained. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)