Journal article
Above-band gap two-photon absorption and its influence on ultrafast carrier dynamics in ZnTe and CdTe
In
Applied Physics Letters
—
2002, Volume 80, Issue 25, pp. 4771-4773
Abstract
We present measurements of transient carrier dynamics subsequent to intense above-band gap femtosecond excitation of the II–VI compounds ZnTe and CdTe, probed in the far infrared by transient terahertz time-domain spectroscopy. The intensity and temperature dependence of the carrier dynamics illuminates the role of two-photon absorption (TPA) of pump photons.
At cold temperatures and high excitation intensities TPA results in a photoexcited carrier distribution which requires several picoseconds to thermalize. As a consequence, the dielectric function of the carrier distribution deviates strongly from the Drude model for as long as 20 ps after excitation.
| Language: | Undetermined |
|---|---|
| Publisher: | American Institute of Physics |
| Year: | 2002 |
| Pages: | 4771-4773 |
| ISSN: | 10773118 and 00036951 |
| Types: | Journal article |
| DOI: | 10.1063/1.1489480 |
