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The effect of thickness and/or doping on the nonlinear and saturable absorption behaviors in amorphous GaSe thin films
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10.1063/1.3486047
/content/aip/journal/jap/108/6/10.1063/1.3486047
http://aip.metastore.ingenta.com/content/aip/journal/jap/108/6/10.1063/1.3486047

Figures

Image of FIG. 1.
FIG. 1.

(a) Plot of vs energy. Inset shows the graph of energy band gap values (Eg) vs thickness for GaSe. (b) Linear optical absorption spectra vs energy of GaSe, GaSe:Ge, and GaSe:Sn thin films with 74 nm film thicknesses. Inset shows the graph of vs energy.

Image of FIG. 2.
FIG. 2.

Large scale 3D AFM images of GaSe thin films for (a) 45 nm and (b) 74 nm film thicknesses.

Image of FIG. 3.
FIG. 3.

OA scan traces of GaSe thin films with various thicknesses at the same fluences for (a) nanosecond and (b) picosecond pulse durations.

Image of FIG. 4.
FIG. 4.

OA -scan traces of 0.01 at. % Ge doped GaSe thin films with various thicknesses at the same fluences for (a) nanosecond and (b) picosecond pulse durations.

Image of FIG. 5.
FIG. 5.

OA -scan traces of 0.5 at. % Sn doped GaSe thin films with various thicknesses at the same fluences for (a) nanosecond and (b) picosecond pulse durations.

Image of FIG. 6.
FIG. 6.

Femtosecond pump-probe spectroscopy graphs showing time evolution of NA at 800 nm pump wavelength of (a) GaSe, (b) 0.01 at. % Ge doped GaSe, and (c) 0.5 at. % Sn doped GaSe.

Image of FIG. 7.
FIG. 7.

Intensity dependent OA -scan traces of undoped and doped GaSe thin films with 74 nm thickness for picosecond pulse duration: (a) GaSe, (b) 0.01 at. % Ge doped GaSe, and (c) 0.5 at. % Sn doped GaSe.

Tables

Generic image for table
Table I.

The saturation intensity threshold and effective NA coefficients of GaSe, 0.01 at. % Ge doped GaSe, and 0.5 at. % Sn doped GaSe thin films at nanosecond and picosecond pulse durations.

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/content/aip/journal/jap/108/6/10.1063/1.3486047
2010-09-20
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: The effect of thickness and/or doping on the nonlinear and saturable absorption behaviors in amorphous GaSe thin films
http://aip.metastore.ingenta.com/content/aip/journal/jap/108/6/10.1063/1.3486047
10.1063/1.3486047
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