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Study of nonlinear optical properties of pure and Mg‐doped ZnO films
Author(s) -
Agrawal Arpana,
Ahmad Dar Tanveer,
Solanki Ravi,
Phase Deodatta M.,
Sen Pratima
Publication year - 2015
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.201451686
Subject(s) - doping , materials science , band gap , absorption (acoustics) , refraction , excitation , nonlinear system , optoelectronics , nonlinear optics , laser , optics , refractive index , physics , quantum mechanics , composite material
Abstract We report the nonlinear optical properties in pulsed laser deposited pure and Mg‐doped ZnO films at an excitation energy ( ≈ 1.95 eV) much smaller than the band gap energies ( ≥ 3.24 eV) of the films. The nonlinear absorption is attributed to the presence of defect states whereas the nonlinear refraction arises due to thermal lensing effect. Larger contribution of nonlinear absorption compared to nonlinear refraction suggests the utility of Mg‐doped ZnO films in optical limiting device applications.