| Autor: |
Takahashi, Hiroshi, Sakai, Masahiro, Quema, Alex, Ono, Shingo, Sarukura, Nobuhiko, Nishijima, Gen, Watanabe, Kazuo |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 5/1/2004, Vol. 95 Issue 9, p4545-4550, 6p, 1 Diagram, 4 Graphs |
| Abstrakt: |
We present the magnetic-field dependence of terahertz (THz)-radiation power from femtosecond-laser-irradiated InAs with various surface orientations. Under 800 nm optical excitation, the magnetic field that provides the maximum THz-radiation power is found to be affected by the surface orientation, and InAs (111) exhibits it at lower magnetic fields than that of the other surfaces. In contrast, under 1560 nm excitation, the dependence on the surface orientation almost disappeared, and saturation is observed at a much smaller magnetic field than that in the 800 nm excitation case. Additionally, from the results of magnetic-field dependence up to 14 T, the shift of the peak in the THz-radiation spectrum toward lower frequency is confirmed, depending on the magnetic field applied, which is possibly induced by the emergence of a magnetoplasma effect. © 2004 American Institute of Physics. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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