Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
59 (1991), S. 1878-1880
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
A pump-probe, light by light deflection technique employing 120 fs pulses at λ=620 nm has been used to measure the temporal and irradiance (I) dependence of the refractive index (n) in 100-μm-thick single crystals of CdS0.75Se0.25 and CdS at 295 K. For I〈3 GW/cm2 only instantaneous negative changes in n are observed and are attributed to Stark and two-photon resonance effects while for higher I negative changes with onset times of approximately 2 ps are attributed to the cooling of two-photon generated carriers. For I(approximately-greater-than)30 GW/cm2 a partial recovery of n occurs within 10 ps and is attributed to possible threshold dependent recombination processes. The variation of probe-beam deflection with pump irradiance has been determined for different probe delays and related to two photon absorption of the pump beam.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.106175
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