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Kim, Dai-Sik
Nano Optics Group
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Excitonic origin of femtosecond nonlinearity near the bandgap of a commercial CdSSe semiconductor-doped glass

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Title
Excitonic origin of femtosecond nonlinearity near the bandgap of a commercial CdSSe semiconductor-doped glass
Author
Lim, YSKim, DSGo, CSMoon, HJKim, GHYee, YHLee, JHChang, JS
Issue Date
1997-10
Publisher
KOREAN PHYSICAL SOC
Citation
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.31, no.4, pp.717 - 721
Abstract
To determine the origin of the nonlinearity near the bandgap of II-VI commercial semiconductor-doped glasses (SDG) with no apparent excitonic features, we studied the temperature dependence of the dephasing time near the bandgap using degenerate four-wave mixing (FWM). The deduced coupling constant with LO phonons was comparable, or nearly equal, to the exciton-LO phonon coupling constants in other II-VI semiconductors and quantum wells. We contend that the nonlinearity observed in FWM is due to excitons, whose features in absorption are overshadowed by the inhomogeneity in the crystal sizes.
URI
https://scholarworks.unist.ac.kr/handle/201301/54678
URL
https://www.jkps.or.kr/journal/view.html?uid=2230&vmd=Full
ISSN
0374-4884
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PHY_Journal Papers
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