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From Arrays of THz Antennas to Large-Area Emitters

MPS-Authors
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Preu,  Sascha
Max Planck Fellow Group, Max Planck Institute for the Science of Light, Max Planck Society;
International Max Planck Research School, Max Planck Institute for the Science of Light, Max Planck Society;

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Malzer,  Stefan
Guests, Max Planck Institute for the Science of Light, Max Planck Society;

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Bauerschmidt,  Sebastian
Russell Division, Max Planck Institute for the Science of Light, Max Planck Society;
International Max Planck Research School, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Doehler, G. H., Enrique Garcia-Munoz, L., Preu, S., Malzer, S., Bauerschmidt, S., Montero-de-Paz, J., et al. (2013). From Arrays of THz Antennas to Large-Area Emitters. IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY, 3(5), 532-544. doi:10.1109/TTHZ.2013.2266541.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002D-6719-6
Abstract
Arrays of coherently driven photomixers with antenna (antenna emitter arrays, AEAs) have been evaluated as a possibility to overcome the power limitations of individual conventional photomixers with antenna ("antenna emitters", AEs) for the generation of continuous-wave (CW) THz radiation. In this paper, "large area emitters" (LAEs) are proposed as an alternative approach, and compared with AEAs. In this antenna-free new scheme of photomixing, the THz radiation originates directly from the acceleration of photo-induced charge carriers generated within a large semiconductor area. The quasi-continuous distribution of emitting elements corresponds to a high-density array and results in favorable radiation profiles without side lobes. Moreover, the achievable THz power is expected to outnumber even large AEAs. Last not least, the technological challenge of fabricating LAEs appears to be significantly less demanding.