Two-photon excitation of fluorescent proteins is an attractive approach for imaging living systems. Today researchers are eager to know which proteins are the brightest and what the best excitation ...
α 2 (ω 1; ω 2) is the ND-2PA coefficient for optical frequencies ω 1,2 and their associated irradiances I 1,2, E p is the Kane energy parameter, E gap is the bandgap energy, n 1,2 are the refractive ...