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High-efficiency generation of both forward and backward optical phase conjugations in one-dimensional nonlinear photonic crystals

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2 Author(s)
Ping Xie ; Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China ; Zhang, Zhao-Qing

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.2191575 

By using only one pump beam, we show theoretically that both forward and backward phase conjugations can be generated simultaneously and efficiently in one-dimensional χ(3)-nonlinear photonic crystals of only a few micrometers in size. The photonic crystal considered here is a CdS/SiO2 superlattice. By using realistic optical parameters in our calculations, we find that the phase-conjugate generation efficiency can be enhanced by four to five orders of magnitude as compared with that in a homogeneous CdS medium of the same nonlinearity and length. The enhancement is caused by multiple reflections as well as strong field localization introduced by the shifted band-edge state, the gap localized state, or the shifted defect state.

Published in:

Journal of Applied Physics  (Volume:99 ,  Issue: 8 )