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Chin. Opt. Lett.
 Home  List of Issues    Issue 09 , Vol. 11 , 2013    10.3788/COL201311.093001


Nonlinear and saturable absorption properties of PbS nanocrystalline thin films
Mustafa Yuksek1, Huseyin Ertap2, Mevlut Karabulut2, Gasan M. Mamedov2
1 Department of Electrical-Electronics Engineering, Engineering and Architecture Faculty, [Kafkas University], 36100 Kars Turkey
2 Department of Physic, Science and Art Faculty, [Kafkas University], 36100 Kars Turkey

Chin. Opt. Lett., 2013, 11(09): pp.093001

DOI:10.3788/COL201311.093001
Topic:Spectroscopy
Keywords(OCIS Code): 300.1030  310.6860  

Abstract
The structural, morphological, optical, and nonlinear optical properties of a lead sulfide (PbS) thin film grown by chemical bath deposition (CBD) are investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), ultraviolet-visible (UV-Vis), and open aperture Z-scan experiments. The band gap energy of the PbS nanocrystalline film is 1.82 eV, higher than that of bulk PbS at 300 K. The nonlinear absorption properties of the film are investigated using the open aperture Z-scan technique at 1064 nm and pulse durations of 4 ns and 65 ps. Intensity-dependent switching of the film from nonlinear absorption to saturable absorption is observed. The nonlinear absorption coefficient increases monotonically with increasing pulse duration from 65 ps to 4 ns.

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Received:2013/3/18
Accepted:2013/7/9
Posted online:2013/9/3

Get Citation: Mustafa Yuksek, Huseyin Ertap, Mevlut Karabulut, Gasan M. Mamedov, "Nonlinear and saturable absorption properties of PbS nanocrystalline thin films," Chin. Opt. Lett. 11(09), 093001(2013)

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