Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1786728 | Current Applied Physics | 2012 | 4 Pages |
Generation of strong THz waves is a very important and difficult research issue. We performed particle-in-cell (PIC) simulation studies to investigate the possibility of powerful THz generation and spectrum controllability by using a laser-driven plasma wave. Our results show that it is possible to produce spectrum-controllable high-power (>1 MV/cm) THz waves by manipulating the plasma density profiles. This method may provide a good way for coherent high-power THz radiation sources, of which the spectrum ranges from a narrow bandwidth to a wide bandwidth.
► We propose a method of spectrum-controllable THz generation. ► The method using a density gradient and a laser was demonstrated by PIC simulations. ► Changing the density gradient and the peak density can produce different THz spectra. ► It can produce ultrashort THz wave pulses with a field strength of cB>>1cB>>1 MV/cm.