Abstract
We report on an ultrafast nonlinear optical response of weakly confined excitons in GaAs thin films observed by a two-beam degenerate four-wave-mixing (DFWM) technique. An ultrafast optical response comparable to the pulse width appears under ultrashort-pulse-laser excitation condition. We clarified from the DFWM spectra that the plural exciton states contribute to the ultrafast response. The results imply a possibility of ultrafast switching devices using weakly confined excitons.
| Original language | English |
|---|---|
| Pages (from-to) | 1731-1734 |
| Number of pages | 4 |
| Journal | Physica Status Solidi (C) Current Topics in Solid State Physics |
| Volume | 4 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2007 Dec 1 |
| Externally published | Yes |
| Event | 33rd International Symposium on Compound Semiconductors, ISCS-2006 - Vancouver, BC, Canada Duration: 2006 Aug 13 → 2006 Aug 17 |
ASJC Scopus subject areas
- Condensed Matter Physics