Abstract
We report the enhancement of the nonlinear optical response of the weakly confined excitons with use of spectrally rectangular pulse. The nonlinear optical response was investigated as a function of excitation energy by a degenerate four-wave-mixing (DFWM) technique. In the case that the laser pulse with the controlled spectral shape excites the plural exciton states simultaneously, the DFWM signal intensity is enhanced by a factor of two in comparison with the intensity under the excitation of a single exciton state. This enhancement is caused by the superposition of the nonlinear optical responses from the plural exciton states.
| Original language | English |
|---|---|
| Article number | 124 |
| Pages (from-to) | 618-622 |
| Number of pages | 5 |
| Journal | Journal of Physics: Conference Series |
| Volume | 61 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2007 Apr 1 |
| Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy(all)
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Kojima, O., Isu, T., Ishi-Hayase, J., Sasaki, M., & Tsuchiya, M. (2007). Enhancement of nonlinear optical response of weakly confined excitons in GaAs thin films by spectrally rectangle-shape-pulse-excitation. Journal of Physics: Conference Series, 61(1), 618-622. [124]. https://doi.org/10.1088/1742-6596/61/1/124