Title :
Terahertz pulse generation and detection with LT-GaAs photoconductive antenna
Author :
Zhang, J. ; Hong, Y. ; Braunstein, S.L. ; Shore, K.A.
Author_Institution :
Sch. of Informatics, Bangor Univ., UK
fDate :
4/26/2004 12:00:00 AM
Abstract :
The characteristics of optically induced teraherz (THz) radiation from a biased low-temperature-grown GaAs (LT-GaAs) photoconductive antenna were investigated using a femtosecond Ti:sapphire laser. The THz pulse radiation from two different LT-GaAs photoconductive antennas were compared and two kinds of THz waveform were observed. Saturation behaviour of the emission of THz radiation is observed by using a CW laser diode to optically pre-bias the emitter antenna.
Keywords :
III-V semiconductors; gallium arsenide; high-speed optical techniques; low-temperature techniques; microwave photonics; photoconducting devices; semiconductor lasers; submillimetre wave antennas; submillimetre wave detectors; submillimetre wave generation; CW laser diode; GaAs; emission saturation behavior; femtosecond Ti:sapphire laser; low-temperature grown GaAs; optically induced terahertz radiation; photoconductive antenna; terahertz pulse detection; terahertz pulse generation;
Journal_Title :
Optoelectronics, IEE Proceedings -
DOI :
10.1049/ip-opt:20040113
