physics.atom-ph

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

Abstract: A way to considerably enhance terahertz radiation, emitted in the interaction of intense mid-infrared 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 mid-infrared pulse with wavelengths of $1.6\div 4\,\mu{\rm m}$ 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 findings.
 Comments: 9 pages, 6 figures Subjects: Atomic Physics (physics.atom-ph); Plasma Physics (physics.plasm-ph) DOI: 10.1103/PhysRevA.98.053415 Cite as: arXiv:1810.08834 [physics.atom-ph] (or arXiv:1810.08834v1 [physics.atom-ph] for this version)

## Submission history

From: Vasily Tulsky [view email]
[v1] Sat, 20 Oct 2018 17:54:59 GMT (1133kb,D)

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