Terahertz-radiation-enhanced broadband terahertz generation from large aperture photoconductive antenna

Terahertz-radiation-enhanced broadband terahertz generation from large aperture photoconductive antenna

A technique of enhancing and broadening terahertz (THz) wave radiation from large aperture photoconductive (PC) antenna is presented in this paper. In this technique, the PC antenna is excited by both the optical and previously generated THz pulses by a laser-induced air plasma created in front of P...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Vol. 109; no. 1; pp. 133 - 136
Main Authors: Gao, Yaohui, Yang, Chia-En, Chang, Yunching, Yao, Jimmy, Yin, Stuart, Luo, Claire, Ruffin, Paul, Brantley, Christina, Edwards, Eugene
Format: Journal Article
Language:English
Published: Berlin/Heidelberg Springer-Verlag 01-10-2012
Subjects:
Engineering
Lasers
Optical Devices
Optics
Photonics
Physical Chemistry
Physics
Physics and Astronomy
Quantum Optics
Unused Portion
Femtosecond Laser
Optical Pump
Nonlinear Optical Rectification
ZnTe
Online Access:Get full text
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Summary:A technique of enhancing and broadening terahertz (THz) wave radiation from large aperture photoconductive (PC) antenna is presented in this paper. In this technique, the PC antenna is excited by both the optical and previously generated THz pulses by a laser-induced air plasma created in front of PC antenna and an enhanced and broadened THz wave signal is obtained. The theoretical and experimental investigation shows that the superposition is the main mechanism for this enhancement. The technique shown in this paper can be very useful for THz imaging and spectroscopy.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-012-5116-4