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Excitation of terahertz radiation by laser pulses in nonuniform plasma channels
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10.1063/1.2715864
/content/aip/journal/pop/14/3/10.1063/1.2715864
http://aip.metastore.ingenta.com/content/aip/journal/pop/14/3/10.1063/1.2715864

Figures

Image of FIG. 1.
FIG. 1.

Schematic diagram of the experimental setup for the generation of axially modulated plasma channels of Ref. 13.

Image of FIG. 2.
FIG. 2.

Dispersion curves, vs , for a periodically modulated channel with normalized modulation size and , according to Eq. (21). Here, is the period of the channel.

Image of FIG. 3.
FIG. 3.

Electron density vs frequency for channels with period and various channel widths. The index , where , gives the range of values for which the light line and dispersion curves cross.

Image of FIG. 4.
FIG. 4.

Coupling coefficient and electron density vs frequency for channels with period , various channel widths and . Coupling minima occur for , where is an odd integer.

Image of FIG. 5.
FIG. 5.

The ratio of power transferred to THz radiation to power transferred to plasma waves for laser pulses in channels with period , , and various channel widths. The ratio peaks for modes that satisfy , where is an even integer.

Tables

Generic image for table
Table I.

Depletion rate for modes with various widths for a laser pulse and .

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/content/aip/journal/pop/14/3/10.1063/1.2715864
2007-03-30
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Excitation of terahertz radiation by laser pulses in nonuniform plasma channels
http://aip.metastore.ingenta.com/content/aip/journal/pop/14/3/10.1063/1.2715864
10.1063/1.2715864
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