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.
© 2002 Optical Society of America
[Optical Society of America ]
Przemyslaw Markowicz, Christopher Friend, Yuzhen Shen, Jacek Swiatkiewicz, Paras N. Prasad, Ovidiu Toader, Sajeev John, and Robert W. Boyd, "Enhancement of two-photon emission in photonic crystals," Opt. Lett. 27, 351-353 (2002)