Femtosecond exciton broadening in ternary IIâVI semiconductor quantum wells
| Autor: | C. Gadaleta, Raffaele Tommasi, Fabrice Vallée, M. C. Netti, N. Del Fatti |
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| Rok vydání: | 1999 |
| Předmět: |
Physics
Condensed matter physics Condensed Matter::Other Exciton Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Molecular physics Electronic Optical and Magnetic Materials Condensed Matter::Materials Science symbols.namesake Pauli exclusion principle Picosecond Femtosecond Electro-absorption modulator symbols Electrical and Electronic Engineering Ternary operation Quantum well Biexciton |
| Zdroj: | Physica B: Condensed Matter. 272:381-383 |
| ISSN: | 0921-4526 |
| DOI: | 10.1016/s0921-4526(99)00307-5 |
| Popis: | Femtosecond exciton dynamics are selectively investigated in a ZnCdSe–ZnSe multiple quantum well at low photoexcited carrier density by means of a two-color absorption saturation technique. Broadening of the exciton lines by the photoexcited carriers is found to dominate the observed nonlinear response, with a carrier distribution dependent dynamics indicating that Pauli exclusion principle effect plays an important role in ternary quantum well systems. On a picosecond time-scale, localized excitons modify the nonlinear response, inducing a frequency shift of the absorption change peak as the system approaches quasiequilibrium. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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