1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Generation of coherent terahertz radiation in ultrafast laser-gas interactionsa)
a)Paper NI2 3, Bull. Am. Phys. Soc. 53, 161 (2008).
Rent:
Rent this article for
USD
10.1063/1.3134422
/content/aip/journal/pop/16/5/10.1063/1.3134422
http://aip.metastore.ingenta.com/content/aip/journal/pop/16/5/10.1063/1.3134422
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

[(a) and (b)] Fundamental (, red dashed line), second harmonic (, blue dotted line), and combined (black solid line) laser fields over one cycle of period. The peak laser intensities are at and at . [(c) and (d)] Tunneling ionization rate [gray line (blue online)] and freed electron drift velocity (line marked with ) as a function of time. [(e) and (f)] Resulting electrical current. The summation over time gives the total dc current. (a), (c), and (e) with a relative phase and (b), (d), and (f) with .

Image of FIG. 2.
FIG. 2.

[(a) and (b)] Combined laser field (multi-oscillation line) and free electron density (black line) as a function of time computed at peak laser intensities of at and at with the same pulse duration of 50 fs (FWHM, Gaussian temporal profiles). The target gas is atmospheric pressure nitrogen. [(c) and (d)] Electron current vs time. (a) and (c) with a relative phase and (b) and (d) with .

Image of FIG. 3.
FIG. 3.

Radiation spectra for [dark gray line (blue online)] and [gray line (red online)] as well as for field alone (black line). The quasi-dc peak (terahertz radiation) is maximal with . There is little terahertz radiation with and nearly no terahertz radiation with single-color alone.

Image of FIG. 4.
FIG. 4.

Terahertz yield vs for parallel (line with circles) and orthogonal polarization (line with triangles) between and fields. The peak laser intensities are at and at with the same pulse duration of 50 fs.

Image of FIG. 5.
FIG. 5.

Terahertz (line with circles) and third harmonic (, line with squares) yields as a function of the relative phase . The peak laser intensities are at and at .

Image of FIG. 6.
FIG. 6.

Nonharmonic two-color mixing with at and at both with 50 fs (FWHM) pulse durations. (a) Combined laser field and free electron density as a function of time. (b) Electron current vs time. (c) Radiation spectra for [gray line (red online)], [dark gray line (blue online)], and (black line).

Image of FIG. 7.
FIG. 7.

[(a) and (b)] Few-cycle laser electric field [gray line (red online)] with a pulse duration of 6 fs (FWHM in intensity) at a peak laser intensity of at . [(c) and (d)] Tunneling ionization rate [gray line (blue online)] and freed electron drift velocity (line marked with ) as a function of time. [(e) and (f)] Resulting dc electrical current at each time. The summation over time gives a net dc current. (a), (c), and (e) with CEP and (b), (d), and (f) with .

Image of FIG. 8.
FIG. 8.

(a) Radiation spectra by a few-cycle pulse (, , ) for (blue line with ), (black line), and (red line with dots). (b) Terahertz (line with circles) and second harmonic (, line with squares) yields over the entire CEP . Terahertz and radiation are maximal at and , respectively, with strong anticorrelation over .

Image of FIG. 9.
FIG. 9.

Terahertz yield vs CEP for 6 fs (line with circles), 8 fs (line with squares), and 10 fs (line with triangles) pulse durations (intensity FWHM) at an intensity of . In all cases, terahertz radiation peaks at .

Loading

Article metrics loading...

/content/aip/journal/pop/16/5/10.1063/1.3134422
2009-05-14
2014-04-24
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Generation of coherent terahertz radiation in ultrafast laser-gas interactionsa)
http://aip.metastore.ingenta.com/content/aip/journal/pop/16/5/10.1063/1.3134422
10.1063/1.3134422
SEARCH_EXPAND_ITEM