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Simultaneous enhancement of the second- and third-harmonic generations in one-dimensional semiconductor photonic crystals

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8 Author(s)
Hui Yang ; Dept. of Phys., Hong Kong Univ. of Sci. & Technol., Kowloon, China ; Ping Xie ; S. K. Chan ; Weixin Lu
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We report on observation of simultaneous strong enhancements of second-harmonic generation (SHG) and third-harmonic generation (THG) in visible spectra region in a one-dimensional ZnSe-ZnMgS semiconductor photonic crystal. These enhancements come from phase matching and a high density of modes near the photonic band edge. Our result shows that the THG is due to direct χ(3) process instead of the cascaded two-step χ(2) process. Measured forward SH conversion efficiency close to 1% for only a few microns thick film demonstrates potential device applications. Theoretical calculations are in good agreement with the experimental measurements.

Published in:

IEEE Journal of Quantum Electronics  (Volume:42 ,  Issue: 4 )