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Terahertz-radiation-enhanced broadband terahertz generation from large aperture photoconductive antenna |
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| Authors: | Yaohui Gao Chia-En Yang Yunching Chang Jimmy Yao Stuart Yin Claire Luo Paul Ruffin Christina Brantley Eugene Edwards |
| Affiliation: | 1. Department of Electrical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA 2. General Opto Solutions, LLC, State College, PA, 16802, USA 3. US Army Aviation and Missile Research Development and Engineering Center, Redstone Arsenal, AL, 35898, USA |
| Abstract: | 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. |
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