We report the observation of significant enhancement of one-step third-harmonic generation in a one-dimensional photonic crystal pumped by a near-infrared laser beam tuned to the low-frequency edge of the first photonic band gap. The third-harmonic phase matching can be controlled by changing the angle of incidence of the fundamental radiation, allowing tunability of the third-harmonic wavelength. The observed phenomenon was modeled theoretically using the transfer-matrix method. The enhancement is attributed to the combined action of phase-matching between the pump and harmonic waves and pump-field localization within the photonic crystal.
Enhancement of third-harmonic generation in a polymer-dispersed liquid-crystal grating
Przemyslaw P. Markowicz, Vincent K. S. Hsiao, Hanifi Tiryaki, Alexander N. Cartwright, Paras N. Prasad, Ksenia Dolgaleva, Nick N. Lepeshkin, Robert W. Boyd; Enhancement of third-harmonic generation in a polymer-dispersed liquid-crystal grating. Appl. Phys. Lett. 1 August 2005; 87 (5): 051102. https://doi.org/10.1063/1.1999849
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