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Amplified spontaneous emission in para-sexiphenyl bulk single crystals
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10.1063/1.2748086
/content/aip/journal/apl/90/24/10.1063/1.2748086
http://aip.metastore.ingenta.com/content/aip/journal/apl/90/24/10.1063/1.2748086
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

X-ray diffraction pattern of a single crystal. The values starting from 23° are magnified by a factor of 10. In the inset: schematic representation of the experimental setup. The excitation spot for ASE measurements had the long axis parallel to the axis and the polarization was in the direction. The emitted light was collected along the axis.

Image of FIG. 2.
FIG. 2.

(Color online) Normalized emission spectra of crystals illuminated with a Xe lamp (triangles), laser pulses (squares), and laser pulses (circles). The nanosecond pump pulses had a fluence of and the femtosecond pump pulses had a fluence of .

Image of FIG. 3.
FIG. 3.

(Color online) Output intensity as a function of pump fluence. Output wavelength of upon nanosecond pumping (squares) and femtosecond pumping (filled circles). Output wavelength of upon femtosecond pumping (empty circles). Output intensities are normalized to the intensity at threshold at . In the inset: FWHM of the peak at as a function of the pump fluence relative to threshold for nanosecond and femtosecond excitations (squares and circles, respectively). Additionally, the FWHM of the PL is marked for reference (triangle).

Image of FIG. 4.
FIG. 4.

(Color online) Relative quantum efficiency below threshold as a function of incident intensity. The solid line represents Eq. (1) using .

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/content/aip/journal/apl/90/24/10.1063/1.2748086
2007-06-11
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Amplified spontaneous emission in para-sexiphenyl bulk single crystals
http://aip.metastore.ingenta.com/content/aip/journal/apl/90/24/10.1063/1.2748086
10.1063/1.2748086
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