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Journal Article

Directionality of terahertz emission from photoinduced gas plasmas

MPS-Authors
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Kohler,  C.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Cabrera-Granado,  E.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Skupin,  S.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Citation

Kohler, C., Cabrera-Granado, E., Babushkin, I., Berge, L., Herrmann, J., & Skupin, S. (2011). Directionality of terahertz emission from photoinduced gas plasmas. Optics Letters, 36(16), 3166-3168.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-8C4D-B
Abstract
Forward and backward terahertz emission by ionizing two-color laser pulses in gas is investigated by means of a simple semianalytical model based on Jefimenko's equations and rigorous Maxwell simulations in one and two dimensions. We find the emission in the backward direction has a much smaller spectral bandwidth than in the forward direction and explain this by interference effects. Forward terahertz radiation is generated predominantly at the ionization front and is thus almost not affected by the opacity of the plasma, in excellent agreement with results obtained from a unidirectional pulse propagation model. (C) 2011 Optical Society of America