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Tunable Circularly Polarized Terahertz Radiation from Magnetized Gas Plasma
- Source :
- Phys. Rev. Lett. 114, 253901 (2015)
- Publication Year :
- 2015
-
Abstract
- It is shown, by simulation and theory, that circularly or elliptically polarized terahertz radiation can be generated when a static magnetic (B) field is imposed on a gas target along the propagation direction of a two-color laser driver. The radiation frequency is determined by $\sqrt{\omega_p^2+{\omega_c^2}/{4}} + {\omega_c}/{2}$, where $\omega_p$ is the plasma frequency and $\omega_c$ is the electron cyclotron frequency. With the increase of the B field, the radiation changes from a single-cycle broadband waveform to a continuous narrow-band emission. In high-B-field cases, the radiation strength is proportional to $\omega_p^2/\omega_c$. The B field provides a tunability in the radiation frequency, spectrum width, and field strength.<br />Comment: 6 pages, 5 figures
- Subjects :
- Physics - Plasma Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Lett. 114, 253901 (2015)
- Publication Type :
- Report
- Accession number :
- edsarx.1504.02291
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.114.253901