TY - JOUR
T1 - Large Optical Nonlinearity Due to Exciton State in PbI2
AU - Ishihara, Teruya
AU - Goto, Takenari
N1 - Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 1988
Y1 - 1988
N2 - Optical nonlinearity is studied in a PbI2 evaporated film under the pump and probe configuration using two tunable nanosecond pulsed lasers. A change of the transmitted probe intensity is observed when the pump frequency is equal to the probe one and is in the exciton region. This Rayleigh-type nonlinearity is neither due to hole burning effect nor thermal grating effect, but due to excitonic population oscillation. The maximum nonlinear absorption amounts to —2 × 105 cm/MW which corresponds to a third-order nonlinear susceptibility of —10–4 esu. Such a large nonlinearity can be explained if the nonlinear interaction takes place over many unit cells, which comes from coherent expanse of an exciton in the crystal.
AB - Optical nonlinearity is studied in a PbI2 evaporated film under the pump and probe configuration using two tunable nanosecond pulsed lasers. A change of the transmitted probe intensity is observed when the pump frequency is equal to the probe one and is in the exciton region. This Rayleigh-type nonlinearity is neither due to hole burning effect nor thermal grating effect, but due to excitonic population oscillation. The maximum nonlinear absorption amounts to —2 × 105 cm/MW which corresponds to a third-order nonlinear susceptibility of —10–4 esu. Such a large nonlinearity can be explained if the nonlinear interaction takes place over many unit cells, which comes from coherent expanse of an exciton in the crystal.
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U2 - 10.1143/JPSJ.57.2191
DO - 10.1143/JPSJ.57.2191
M3 - Article
AN - SCOPUS:0342601720
VL - 57
SP - 2191
EP - 2200
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 6
ER -