Phase-matched third-harmonic generation from nematic liquid crystals

Kosugi, Jun-ichi; Kajikawa, Kotaro
June 2004
Applied Physics Letters;6/14/2004, Vol. 84 Issue 24, p5013
Academic Journal
The type-II phase-matching condition of the direct third-harmonic generation originated from third-order nonlinearity (3ω=ω+ω+ω) is performed in nematic liquid crystals with a fundamental light at 1064 nm. Since the phase-matching condition can be achieved in normal incidence of the fundamental light, the walk-off angle is zero. Thus, the interaction length is equal to the thickness of the liquid crystal film. Although the conversion efficiency in the present system is still low, 9.1×10-8, it will become 10-2 as discussed in this letter. © 2004 American Institute of Physics.


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