标题: | Saturation of the free carrier absorption in ZnTe crystals |
作者: | Ku, S. A. Tu, C. M. Chu, W. -C. Luo, C. W. Wu, K. H. Yabushita, A. Chi, C. C. Kobayashi, T. 电子物理学系 Department of Electrophysics |
公开日期: | 17-六月-2013 |
摘要: | This study systematically investigates the influence of free carriers on the generation of THz in ZnTe crystals, over a wide range of pumping fluences. As the pumping fluence is increased (< 6.36 mJ/cm(2)), the concentration of free carriers gradually increases and the THz output power is saturated, as clearly demonstrated by the time delay in the THz temporal waveforms, the changes in the THz spectral weight and the red-shift in the PL spectra. For high pumping fluences (> 6.36 mJ/cm(2)), spectacularly, there is a significant quadratic increase in the THz output power when the pumping fluence is increased, as well as at low pumping fluences of < 0.58 mJ/cm(2), because of the saturation of free carriers. (C) 2013 Optical Society of America |
URI: | http://dx.doi.org/10.1364/OE.21.013930 http://hdl.handle.net/11536/22292 |
ISSN: | 1094-4087 |
DOI: | 10.1364/OE.21.013930 |
期刊: | OPTICS EXPRESS |
Volume: | 21 |
Issue: | 12 |
起始页: | 13930 |
结束页: | 13937 |
显示于类别: | Articles |
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