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Phys Rev E Stat Nonlin Soft Matter Phys. 2001 Apr;63(4 Pt 2):046609. Epub 2001 Mar 27.

Enhancement of sum frequency generation near the photonic band gap edge under the quasiphase matching conditions.

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  • 1Department of Physics and International Laser Center, M. V. Lomonosov Moscow State University, Moscow 119899, Russia.

Abstract

We analyze theoretically and study experimentally the mechanisms of enhancement of the sum frequency and second harmonic generation in a finite one-dimensional photonic band gap structure with second order nonlinearity under Bragg diffraction conditions. It is shown that, near the photonic band gap edge, the efficiency of conversion in sum frequency and second harmonic generation processes can be significantly enhanced if two conditions are fulfilled simultaneously: grating assisted phase matching, or quasiphase matching, and an increase of the electromagnetic field density at the fundamental frequencies near the photonic band edges. The role of each mechanism is discussed.

PMID:
11308970
[PubMed]
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