TY  - JOUR
AU  - Wang, W.-M.
AU  - Gibbon, P.
AU  - Sheng, Z.-M.
AU  - Li, Y.-T.
TI  - Tunable Circularly Polarized Terahertz Radiation from Magnetized Gas Plasma
JO  - Physical review letters
VL  - 114
IS  - 25
SN  - 1079-7114
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2015-04834
SP  - 253901
PY  - 2015
AB  - It is shown, by simulation and theory, that circularly orelliptically polarized terahertz radiation can be generated when astatic magnetic (B) field is imposed on a gas target along thepropagation direction of a two-color laser driver. The radiationfrequency 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 ofthe B field, the radiation changes from a single-cycle broadbandwaveform to a continuous narrow-band emission. In high-B-fieldcases, the radiation strength is proportional to$\omega_p^2/\omega_c$. The B field provides a tunability in theradiation frequency, spectrum width, and field strength.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000356667200005
DO  - DOI:10.1103/PhysRevLett.114.253901
UR  - https://juser.fz-juelich.de/record/202644
ER  -