Article

Enhancement of two-photon emission in photonic crystals.

Optics Letters (Impact Factor: 3.18). 04/2002; 27(5):351-3. DOI: 10.1364/OL.27.000351
Source: PubMed

ABSTRACT We report the influence of photonic stopgaps on two-photon excited emission from highly efficient nonlinear chromophores infiltrated into high-quality photonic crystals. We have observed a sharp decrease (filter effect) in emission within the frequency range and direction of the stopgap as well as sharp enhancement of the two-photon excited emission associated with the stopgap's edge. This effect may be important for the development of low-threshold upconversion lasers.

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