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Generation and detection of terahertz radiation by electro-optical process in GaAs using fiber laser pulses
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View: Figures


Image of FIG. 1.
FIG. 1.

Coherent length at as a function of optical wavelength calculated using the parameters of various zinc-blende semiconductors (Ref. 13).

Image of FIG. 2.
FIG. 2.

(a) Optical group index and (b) refractive index in the THz region in GaAs, (c) coherent length at vs THz frequency.

Image of FIG. 3.
FIG. 3.

Sketch of the experimental setup. WP is a Wolston prism. In the measurement of the probe, we set the crystal for frequency doubling and a wave plate at the mark of SH.

Image of FIG. 4.
FIG. 4.

Temporal wave form and power spectrum of THz radiation from GaAs using laser excitation. Detection is achieved with EO sampling using a GaAs crystal and sampling pulses.

Image of FIG. 5.
FIG. 5.

Temporal wave form of the THz radiation from a GaAs emitter using laser excitation. For EO sampling, we use (a) ZnTe crystal with thickness and sampling pulses, (b) GaAs crystal with thickness and sampling pulses.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Generation and detection of terahertz radiation by electro-optical process in GaAs using 1.56μm fiber laser pulses