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Journal Article

Boosting terahertz-radiation power with two-color circularly polarized midinfrared laser pulses

MPS-Authors
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Tulsky,  Vasily A.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Baghery,  Mehrdad
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

/persons/resource/persons184907

Saalmann,  Ulf
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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

External Resource

https://journals.aps.org/pra/abstract/10.1103/PhysRevA.98.053415
(Publisher version)

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1810.08834.pdf
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Citation

Tulsky, V. A., Baghery, M., Saalmann, U., & Popruzhenko, S. V. (2018). Boosting terahertz-radiation power with two-color circularly polarized midinfrared laser pulses. Physical Review A, 98(5): 053415. doi:10.1103/PhysRevA.98.053415.


Cite as: https://hdl.handle.net/21.11116/0000-0002-9D9F-B
Abstract
A way to considerably enhance terahertz radiation, emitted in the interaction of intense midinfrared laser pulses with atomic gases, in both the total energy and the electric-field amplitude is suggested. The scheme is based on the application of a two-color field consisting of a strong circularly polarized midinfrared pulse with wavelengths of 1.6-4 mu m and its linearly or circularly polarized second harmonic of lower intensity. By combining the strong-field approximation for the ionization of a single atom with particle-in-cell simulations of the collective dynamics of the generated plasma, it is shown that the application of such two-color circularly polarized laser pulses may lead to an order-of-magnitude increase in the energy emitted in the terahertz frequency domain as well as in a considerable enhancement in the maximal electric field of the terahertz pulse. Our results support recently reported experimental and numerical finding.