Single attosecond pulse generation in an orthogonally polarized two-color laser field combined with a static electric field

Quantum path control on the harmonic emission in the presence of a terahertz field

“…Based on this, a new scheme with the coherent THz control to HHG generation has been put forward and widely investigated [24][25][26][27]. In this paper, we applied this scheme (in combination with an intense fundamental chirp pulse of 5 fs/1200 nm) to investigate the quantum path control on the harmonic spectra emitted from a model Ne atom.…”

“…The work [26] also concisely presented the harmonic spectrum in single Ne atom by chirp-free driving pulse of 5.2 fs/ 800 nm and 8 fs/800 nm on the basis of the numerical integration of the Lewenstein integral. By numerical solution of time-dependent Schrödinger equation, static-electric-field assisted harmonic generation in a model He atom with an orthogonally polarized two-color laser field [25] and with a few-cycle pulse [28] as well as in a single H atom with chirped laser pulse [29] have been studied and reported. To understand the effect of the THz field on harmonic generation at a microscopic level, perhaps a combination of having frequencies of 30THz-60THz and intensities around 10 13 w/ cm 2 [23].…”

Control continuum bandwidth and attosecond pulse generation by infrared laser parametric source

“…Kim et al created isolated attosecond pulse by adding a weak pulse in the IR region [22]. Liu et al propose a scheme for generating isolated 39-as pulse theoretically by adding a XUV pulse upon the synthesized twocolor field at a proper time [28,29]. Previous works showed macroscopic effect also plays an important role in isolated attosecond pulse generation [36,37].…”

“…Polarization gating technique by utilizing the pulse's polarization angle to modulate the HHG process has been realized which relax the laboratory requirement for generating attosecond pulse [13][14][15][16][17][18][19]. Temporal gating is another technique for generating continuum with broader spectral width by superposing two few-cycle pulses [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34]. Recently, Feng et al [19] generate an isolated attosecond pulse by using 20 to 28 fs driving lasers pulse employing polarization gating technology.…”

Macroscopic study and control of high-order harmonic and attosecond pulse generation in noble gases

“…Many studies have been carried out on the effect of long wavelength (compared to the laser field generating HOH) or DC fields on high-order harmonic generation, and at single atom level this process has been analysed thoroughly using classical [156] and semi-classical models [157], using zero range potential calculations [158], strong-field approximation [159,160] and by solving the time dependent Schrödinger equation for a model atom [156,161,162,163,164].…”