Two-Photon Absorption Induced Transmission Changes In Znse Interference Filters
We observe two-photon absorption (2PA) of picosecond, 0.6-μm, 0.3-nJ pulses in a 0.4-μm film of ZnSe. We use high-frequency-modulation phase-sensitive detection to be near the shot-noise limit combined with a low-frequency pulse-delay modulation to discriminate against large thermal nohlinearities. This dual-modulation technique, combined with the field enhancement produced by placing the film in a resonant cavity, permits observation of 2PA and other fast nonlinearities by using pulses having peak powers of the order of 1 W.
IEEE Transactions on Circuits and Systems
Vanstryland, E. W.; Miller, S. A.; Woodall, M. A.; and Wherrett, B. S., "Two-Photon Absorption Induced Transmission Changes In Znse Interference Filters" (1988). Faculty Bibliography 1980s. 715.