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Conference Paper

Coherent Superposition of Terahertz Beams from a Phased Linear Photomixer Array

MPS-Authors
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Bauerschmidt,  Sebastian
Max Planck Fellow Group, Max Planck Institute for the Science of Light, Max Planck Society;

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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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Wang,  Lijun
Max Planck Fellow Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Bauerschmidt, S., Preu, S., Malzer, S., Doehler, G. H., Wang, L., Lu, H., et al. (2009). Coherent Superposition of Terahertz Beams from a Phased Linear Photomixer Array. In TERAHERTZ AND MID INFRARED RADIATION: BASIC RESEARCH AND PRACTICAL APPLICATIONS, WORKSHOP PROCEEDINGS (pp. 75-76). 345 E 47TH ST, NEW YORK, NY 10017 USA: IEEE.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-6C3F-C
Abstract
We report on a 4 element linear array of free standing, tunable THz n-i-pn-i-p superlattice photomixers. The individual THz beams are coherently combined at a target plane distance of 4.2 m. The measurements of the interference pattern confirm the theoretically expected quadratic intensity increase of the center beam with the number of sources. At the same time, the beam waist is reduced in one dimension by a factor of 6 compared to a single beam. This technique allows for high resolution, THz stand off imaging.