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Efficient terahertz generation by optical rectification in Si-LiNbO3-air-metal sandwich structure with variable air gap
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10.1063/1.4719674
/content/aip/journal/apl/100/20/10.1063/1.4719674
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/20/10.1063/1.4719674
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Experimental setup. The scheme of the sandwich structure is shown in the inset.

Image of FIG. 2.
FIG. 2.

(a) Spectra and (b) oscillograms of the terahertz field generated by 50 fs laser pulse with 5 μJ energy in the sandwich structure with b = 0 (solid curve) and b = ∞ (dotted curve). (c) Theoretically calculated spectra for the corresponding b and laser pulse duration.

Image of FIG. 3.
FIG. 3.

(a) Normalized terahertz energy as a function of air gap b for 50 fs laser pulse (diamonds – experimental data, solid curve – theoretical calculation). (b) Conversion efficiency as a function of optical energy at b = 0 for pulse duration of 50 fs (crosses), 150 fs with positive and negative chirp (filled and empty circles, respectively), 220 fs (diamonds), and 400 fs (triangles) with negative chirp. In the inset, terahertz field spectra for 16 μJ laser pulse with positive (dashed) and negative (solid) chirp and duration of 150 fs.

Image of FIG. 4.
FIG. 4.

Conversion efficiency as a function of laser pulse duration with positive (filled circles) and negative (empty circles) chirp for (a) 2 μJ and (b) 18 μJ pump energy. Dashed curves – theoretical calculation.

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/content/aip/journal/apl/100/20/10.1063/1.4719674
2012-05-17
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Efficient terahertz generation by optical rectification in Si-LiNbO3-air-metal sandwich structure with variable air gap
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/20/10.1063/1.4719674
10.1063/1.4719674
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