Plasma Modulation of Harmonic Emission Spectra from Laser-Dense Plasma Interactions
نویسنده
چکیده
We report results from PIC simulations of the interaction of intense laser light with overdense plasma designed to examine the effects of plasma waves generated by pulses of fast electrons on high harmonic emission from the plasma. We show that the emission spectrum is modulated at the plasma frequency and identify combinations of parameters and circumstances favourable for modulation. In particular the observed modulation is shown to depend not only on the chosen plasma electron density and intensity of the incident light but on the density profile and pulse shape.
منابع مشابه
Modulation of harmonic emission spectra in relativistic laser interactions with overdense plasma
متن کامل
1 5 N ov 2 00 4 Modulation of Harmonic Emission Spectra from Intense Laser - Plasma Interactions
We report results from a series of PIC simulations carried out to investigate the interaction of intense laser light with overdense plasma and in particular, aspects of the harmonic emission spectrum generated in these interactions. Recent observations of emission in this range by Watts et al. [1] show emission above the 20th harmonic extending to the 37th with conversion efficiencies of order ...
متن کاملEffects of laser-plasma interactions on terahertz radiation from solid targets irradiated by ultrashort intense laser pulses.
Interactions of 100-fs laser pulses with solid targets at intensities of 10(18) W/cm(2) and resultant terahertz (THz) radiation are studied under different laser contrast ratio conditions. THz emission is measured in the specular reflection direction, which appears to decrease as the laser contrast ratio varies from 10(-8) to 10(-6). Correspondingly, the frequency spectra of the reflected light...
متن کاملLaser-produced plasma-wall interaction
Jets of laser–generated plasma represent a flexible and well-defined model environment for investigation of plasma interactions with solid surfaces (walls). The pilot experiments carried out on the iodine laser system (5–200 J, 0.44 mm, 0.25–0.3 ns, ,1 10 W/cm) at the PALS Research Centre in Prague are reported. Modification of macroscopic characteristics of the Al plasma jets produced at laser...
متن کاملAttosecond Control of Relativistic Electron Bunches using Two-Colour Fields
Energy coupling during relativistically intense laser-matter interactions is encoded in the attosecond motion of strongly driven electrons at the pre-formed plasma-vacuum boundary. Studying and controlling this motion can reveal details about the microscopic processes that govern a vast array of light-matter interaction physics and applications. These include research areas right at the forefro...
متن کامل