Open AccessSecond harmonic generation study of internallygenerated strain in bismuth-substituted iron garnet films
Author(s) -
Pradeep Kumar,
A. I. Maydykovskiy,
M. Levy,
N. V. Dubrovin,
O. A. Aktsipetrov
Publication year - 2010
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.18.001076
Subject(s) - bismuth , second harmonic generation , materials science , strain (injury) , lattice (music) , optics , lattice constant , condensed matter physics , yttrium , yttrium iron garnet , nonlinear system , nonlinear optics , high harmonic generation , physics , metallurgy , diffraction , laser , quantum mechanics , acoustics , medicine , oxide
The present article highlights the lattice-imperfection and compositional origins of the nonlinear optical response in bismuth-substituted iron garnet films. In particular the roles of lattice mismatch strain and micro-strain on second harmonic generation in (Bi,Y)(3)(Fe,Ga)(5)O(12) films are elucidated based on experimental findings. It is found that lattice mismatch strain drives the second harmonic signal in (Bi,Y)(3)(Fe,Ga)(5)O(12) films, in agreement with theoretical predictions; however micro-strain was found not to correlate significantly with the second harmonic signal at the micro-strain levels present in these samples. The present study also elaborates on the influence of the film's constitutive elements and finds the nonlinear response to increase with yttrium concentration.