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Magnetic-field-induced fourfold azimuthal angle dependence in the terahertz radiation power of (100) InAs
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10.1063/1.2721385
/content/aip/journal/apl/90/15/10.1063/1.2721385
http://aip.metastore.ingenta.com/content/aip/journal/apl/90/15/10.1063/1.2721385
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Figures

Image of FIG. 1.
FIG. 1.

Subtracted TDS wave forms for the field and field cases where the orientation of the applied magnetic field is shown in the inset. The -shifted wave forms clearly show the reversal of the dominant Lorentz-force-driven current surge when the field direction was flipped.

Image of FIG. 2.
FIG. 2.

Excitation fluence dependence of the emitted terahertz radiation. The photocarrier-related radiation mechanism saturates at about . All the subsequent azimuthal-angle-dependence measurements were performed at an excitation fluence of , wherein the surge current terahertz radiation is expected to be dominant.

Image of FIG. 3.
FIG. 3.

(a) Azimuthal angle dependence of the -polarized terahertz radiation power (the voltage values are the actual lock-in amplifier readouts). The twofold symmetry of the bulk optical rectification effect for (100) InAs was modified to a fourfold symmetry with the transverse magnetic field. (b) Weak fourfold dependence is observed in the -polarized terahertz radiation even with no applied field. These results are suggested to be due to the photocarrier scattering to the or valleys.

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/content/aip/journal/apl/90/15/10.1063/1.2721385
2007-04-12
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magnetic-field-induced fourfold azimuthal angle dependence in the terahertz radiation power of (100) InAs
http://aip.metastore.ingenta.com/content/aip/journal/apl/90/15/10.1063/1.2721385
10.1063/1.2721385
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