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High-bandwidth terahertz radiation from ponderomotively accelerated carriers using Bessel–Gauss femtosecond pulses
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10.1063/1.1861135
/content/aip/journal/apl/86/6/10.1063/1.1861135
http://aip.metastore.ingenta.com/content/aip/journal/apl/86/6/10.1063/1.1861135
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic of the THz emitter (top). Comparison of C-FDTD (bottom-left) and the analytical (bottom-right) descriptions of a focused radially polarized beam inside a GaAs semiconductor.

Image of FIG. 2.
FIG. 2.

Spatiotemporal evolution of the radial (left) and longitudinal (right) current densities within the semiconductor at times −5, 0, and 5 fs relative to the peak of the radially polarized Bessel–Gauss pulse.

Image of FIG. 3.
FIG. 3.

THz pulse components originating from the (a) radial and (b) longitudinal current density components detected 1 cm away from the semiconductor surface for fluence values of (i) , (ii) , and (iii) . The emitted radiation pattern is depicted in the inset. Maximum THz emission is obtained at and relative to the normal for pulse components originating from and . The bottom inset in (b) depicts the THz spectrum.

Image of FIG. 4.
FIG. 4.

THz emission power vs energy fluence for Bessel–Gauss and Gaussian fs pulses.

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/content/aip/journal/apl/86/6/10.1063/1.1861135
2005-02-04
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: High-bandwidth terahertz radiation from ponderomotively accelerated carriers using Bessel–Gauss femtosecond pulses
http://aip.metastore.ingenta.com/content/aip/journal/apl/86/6/10.1063/1.1861135
10.1063/1.1861135
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