Terahertz Kerr effect

Hoffmann, Matthias C.; Brandt, Nathaniel C.; Hwang, Harold Y.; Yeh, Ka-Lo; Nelson, Keith A.

doi:10.1063/1.3271520

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Terahertz Kerr effect

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http://dx.doi.org/10.1063/1.3271520
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Hoffmann, M. C., Brandt, N. C., Hwang, H. Y., Yeh, K.-L., & Nelson, K. A. (2009). Terahertz Kerr effect. Applied Physics Letters, 95(23): 231105. doi:10.1063/1.3271520.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0028-1C78-3

Abstract

We have observed optical birefringence in liquids induced by single-cycle terahertz pulses with field strengths exceeding 100 kV/cm. The induced change in polarization is proportional to the square of the terahertz electric field. The time-dependent terahertz Kerr signal is composed of a fast electronic response that follows the individual cycles of the electric field and a slow exponential response associated with molecular orientation.