%0 Journal Article
%A Wang, W.-M.
%A Gibbon, P.
%A Sheng, Z.-M.
%A Li, Y.-T.
%T Tunable Circularly Polarized Terahertz Radiation from Magnetized Gas Plasma
%J Physical review letters
%V 114
%N 25
%@ 1079-7114
%C College Park, Md.
%I APS
%M FZJ-2015-04834
%P 253901
%D 2015
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000356667200005
%R 10.1103/PhysRevLett.114.253901
%U https://juser.fz-juelich.de/record/202644