Distortion-free enhancement of terahertz signals measured by electro-optic sampling. I. Theory

Brunner, Fabian D.J.; Johnson, Jeremy A.; Grübel, Sebastian; Ferrer, Andrés; Johnson, Steven L.; Feurer, Thomas (2014). Distortion-free enhancement of terahertz signals measured by electro-optic sampling. I. Theory. Journal of the Optical Society of America. B - optical physics, 31(4), pp. 904-910. Optical Society of America 10.1364/JOSAB.31.000904

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We present three methods for the distortion-free enhancement of THz signals measured by electro-optic sampling in zinc blende-type detector crystals, e.g., ZnTe or GaP. A technique commonly used in optically heterodyne-detected optical Kerr effect spectroscopy is introduced, which is based on two measurements at opposite optical biases near the zero transmission point in a crossed polarizer detection geometry. In contrast to other techniques for an undistorted THz signal enhancement, it also works in a balanced detection scheme and does not require an elaborate procedure for the reconstruction of the true signal as the two measured waveforms are simply subtracted to remove distortions. We study three different approaches for setting an optical bias using the Jones matrix formalism and discuss them also in the framework of optical heterodyne detection. We show that there is an optimal bias point in realistic situations where a small fraction of the probe light is scattered by optical components. The experimental demonstration will be given in the second part of this two-paper series [J. Opt. Soc. Am. B, doc. ID 204877 (2014, posted online)].

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Applied Physics

UniBE Contributor:

Brunner, Fabian Dominik Jürg and Feurer, Thomas

Subjects:

600 Technology > 620 Engineering

ISSN:

0740-3224

Publisher:

Optical Society of America

Language:

English

Submitter:

Martin Frenz-Lips

Date Deposited:

05 Feb 2015 10:07

Last Modified:

05 Oct 2015 09:05

Publisher DOI:

10.1364/JOSAB.31.000904

BORIS DOI:

10.7892/boris.62374

URI:

https://boris.unibe.ch/id/eprint/62374

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