Abstract

In this paper, generation of terahertz (THz) radiation by the beating of two super-Gaussian laser beams in a nanocluster plasma is investigated, theoretically. The electric field of laser beams interacts with the nanocluster, leads to the ionization of the cluster atoms, and produces nanoplasma. Interaction of laser beams with the electronic clouds of nanoplasma generates ponderomotive force that leads to the creation of a macroscopic electron current at the beat frequency, which can generate THz radiation. The THz wave equations and THz efficiency in the nanoplasma medium were analytically derived and then numerically discussed. The effects of the density and radius of nanoclusters, the laser beam width, and intensity of super-Gaussian lasers on the THz radiation efficiency have been investigated in the nanoplasma-based THz emitter. The results indicated when the beat-wave frequency approaches the effective plasmon frequency of the nanoplasma, the maximum value of the field amplitude of THz radiation is acquired. In addition, it was found that the best situation that can be obtained is the THz radiation occurring at frequency $\omega = {\omega _p}/\sqrt 3$.

© 2020 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Characteristics of spatiotemporal dynamics of a quadruple Gaussian laser beam in a relativistic ponderomotive magnetized plasma

Nidhi Pathak, P. C. Agarwal, T. S. Gill, and Sukhdeep Kaur
J. Opt. Soc. Am. B 37(10) 2892-2900 (2020)

Propagation of two intense cosh-Gaussian laser beams in plasma in the relativistic-ponderomotive regime

Gunjan Purohit, Bineet Gaur, and Priyanka Rawat
J. Opt. Soc. Am. B 33(8) 1716-1722 (2016)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (9)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (18)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription