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Terahertz emission from a laser pulse with tilted front: Phase-matching versus Cherenkov effect
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10.1063/1.2989999
/content/aip/journal/jap/104/7/10.1063/1.2989999
http://aip.metastore.ingenta.com/content/aip/journal/jap/104/7/10.1063/1.2989999
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematics of an optical pulse with tilted intensity front and the radiation pattern produced by the pulse in an electro-optic crystal.

Image of FIG. 2.
FIG. 2.

The frequency and the angles of the group and phase fronts of the phase-matched terahertz wave as functions of for with negligible damping excited with Ti:sapphire laser.

Image of FIG. 3.
FIG. 3.

Total terahertz field (solid line), near field (filled squares), and phase-matched wave (open circles) plotted on the basis of Eqs. (8), (10), and (12), respectively, for different (shown on the frames). Parameters used correspond to the excitation of with Ti:sapphire laser (, ) at 10 K [(a)–(c)] and 300 K (d).

Image of FIG. 4.
FIG. 4.

Snapshots of the electric field produced in with Ti:sapphire laser (, , and ). The temperature and are shown on the frames. The dotted line shows the transverse profile of the optical intensity.

Image of FIG. 5.
FIG. 5.

The distributions and for the crystal excited with Ti:sapphire laser (, , and ). The temperature and are shown on the panels. The interval of , where the optical pulse exists, is marked (at the half-maximum level) by dashed lines.

Image of FIG. 6.
FIG. 6.

The spectral density of the terahertz energy in dependence on [(a) and (c)] and [(b) and (d)] at 10 K and for [(a) and (b)] the fixed energy and [(c) and (d)] fixed intensity of the optical pulse. At the right sides of the panels, the terahertz energy is shown as a function of [(a) and (c)] and [(b) and (d)]. In (a) and (c) , in (b) and (d) .

Image of FIG. 7.
FIG. 7.

The terahertz energy as a function of at 10 K for and . The dashed curve shows the energy passed through the interval .

Image of FIG. 8.
FIG. 8.

The spectral density of the terahertz energy as a function of and at 300 K for different parameters of the optical pulse: , (a), , (b), , (c), and , (d). At the right sides of the panels, the terahertz energy is shown as a function of . The optical pulse energy is fixed to .

Image of FIG. 9.
FIG. 9.

The optical-to-terahertz conversion efficiency as a function of and at 300 K for the fixed optical pulse energy (a) and fixed optical intensity (b). The tilt angle is .

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/content/aip/journal/jap/104/7/10.1063/1.2989999
2008-10-03
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Terahertz emission from a laser pulse with tilted front: Phase-matching versus Cherenkov effect
http://aip.metastore.ingenta.com/content/aip/journal/jap/104/7/10.1063/1.2989999
10.1063/1.2989999
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