Terahertz Radiation from Large Aperture Bulk Semi-insulating GaAs Photoconductive Dipole Antenna
| Autor: | Shi Wei, XU Jing-Zhou, Zhang X-C, Hou Lei, Jia Wan-Li |
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| Rok vydání: | 2004 |
| Předmět: |
Patch antenna
Materials science Condensed Matter::Other business.industry Loop antenna Antenna aperture Astrophysics::Instrumentation and Methods for Astrophysics General Physics and Astronomy Antenna factor Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Radiation pattern law.invention Condensed Matter::Materials Science Optics law Optoelectronics Dipole antenna Antenna (radio) business Monopole antenna Computer Science::Information Theory |
| Zdroj: | Chinese Physics Letters. 21:1842-1844 |
| ISSN: | 1741-3540 0256-307X |
| Popis: | We report the experimental results of a large-aperture biased semi-insulating GaAs photoconductive dipole antenna, with a gap of 3 mm between two Au/Ge/Ni electrodes, triggered by 800 nm Ti–sapphire laser pulses with 82 MHz repetition rate. A direct comparison is made between insulated GaAs dipole antenna with a Si3N4 layer and bare GaAs dipole antenna. Both the current in the antenna and the radiation amplitude present as linear to the exciting power when the applied voltage is fixed. The Si3N4 insulated GaAs dipole antenna can hold higher biased voltage than a normal GaAs dipole antenna; its terahertz radiation generation efficiency is significantly higher than that of a normal GaAs dipole antenna. |
| Databáze: | OpenAIRE |
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