Enhancement of two-photon emission in photonic crystals.
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.
Markowicz
Przemyslaw
P
Friend
Christopher
C
Shen
Yuzhen
Y
Swiatkiewicz
Jacek
J
Prasad
Paras N
PN
Toader
Ovidiu
O
John
Sajeev
S
Boyd
Robert W
RW