منابع مشابه
Intense terahertz radiation from μm-gap GaAs photoconductive antenna
The terahertz pulse energy from photoconductive antenna is mainly derived from that stored in the static bias field. To obtain high intense THz radiation, the distribution of electrical field in semi-insulating GaAs photoconductive antennas was studied at square DC bias voltage. Due to the trap-enhanced space-charge, the electrical field is enhanced at anode and extent to cathode. So the highes...
متن کاملTerahertz emission from GaAs and InAs in a magnetic field
We have studied terahertz ~THz! emission from InAs and GaAs in a magnetic field, and find that the emitted radiation is produced by coupled cyclotron-plasma charge oscillations. Ultrashort pulses of THz radiation were produced at semiconductor surfaces by photoexcitation with a femtosecond Ti-sapphire laser. We recorded the integrated THz power and the THz emission spectrum as a function of mag...
متن کاملNon-Perturbative Terahertz Sideband Generation from Bulk GaAs
Using intense picosecond pulses of coherent terahertz (THz) radiation, we have investigated time-resolved non-resonant THz sideband generation from bulk GaAs. The THz power dependence clearly reveals a non-perturbative strong-field regime. In addition to the expected ω−2 sideband, we detected the ω−1 (or odd) sideband which has previously been observed only in a quantum well system where the in...
متن کاملTunable terahertz radiation from Stark wave packets.
We investigate the possibility that Stark wave packets can be used as a source of shaped terahertz radiation. Calculations for the sodium atom reveal that the frequency and intensity of the THz emission can be controlled over a broad range by varying the parameters of the excitation pulse.
متن کاملEmission of terahertz radiation from SiC
We report the emission of strong coherent broadband terahertz radiation from 6H-silicon-carbide SiC excited with optical pulses. The measured terahertz spectral signal-to-noise ratio is better than one thousand. We determine that the terahertz radiation is generated via second order optical nonlinearity optical rectification . We present a measurement of the ratio of nonlinear susceptibility te...
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ژورنال
عنوان ژورنال: Applied Physics Letters
سال: 1994
ISSN: 0003-6951,1077-3118
DOI: 10.1063/1.113080