期刊
IEEE JOURNAL OF QUANTUM ELECTRONICS
卷 41, 期 5, 页码 717-728出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JQE.2005.844471
关键词
continuous-wave (CW); LT-GaAs; photoconductive antenna; photomixer; terahertz
资金
- Engineering and Physical Sciences Research Council [GR/R87086/01, GR/R87086/02] Funding Source: researchfish
We have studied terahertz emission from interdigitated finger photomixers coupled to planar antenna structures. Using both pulsed and continuous-wave excitation, polarization measurements reveal that the antenna design dominates the properties of the radiated output at frequencies below 0.6 THz, while the efficiency at higher frequencies is additionally dependent on the design of the photomixer fingers. We have produced terahertz maps of the device, characterizing the photomixer by measuring the generated power as a function of the excitation position. Together, these measurements have allowed us to understand better the distinct roles of the photomixer and antenna in emission at different frequencies and, hence, independently optimize these components.
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