Biexciton and Triexciton States in Quantum Dots in the Weak Confinement Regime
| Autor: | Toshihide Takagahara, Yasuaki Masumoto, Michio Ikezawa, Selvakumar V. Nair |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1997 |
| Předmět: |
Physics
Condensed matter physics Exciton General Physics and Astronomy Photon energy Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Molecular physics Absorption band Quantum dot ComputingMethodologies_DOCUMENTANDTEXTPROCESSING Exciton ground state Absorption (electromagnetic radiation) Biexciton Excitation |
| Zdroj: | Physical review letters. 79(18):3522-3525 |
| ISSN: | 0031-9007 |
| Popis: | application/pdf Biexciton and triexciton states in CuCl quantum dots were studied by means of time-resolved size-selective pump-and-probe technique. A clear induced absorption band is observed on the high-energy side of the excitation photon energy. The new induced absorption is assigned to the transition from the exciton ground state to one of the weakly correlated exciton pair states which were theoretically predicted to exist and to play an important role in nonlinear optical processes. Its pump energy dependence and temporal evolution strongly support this assignment. Under high-density or two-color excitation condition, a triexciton state in quantum dots is observed for the first time. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|