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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 3,
  • Issue S1,
  • pp. S248-S250
  • (2005)

Optical nonlinearities and optical limiting properties of PbS semiconductor nano-belts

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Abstract

The third-order nonlinearities of PbS nano-belts have been investigated using the Z-scan technique with nanosecond laser pulses at 532 nm. The effect of the PbS semiconductor nano-belt size on the third-order optical nonlinearities and optical limiting properties was studied. We found that the nonlinear absorption and nonlinear refraction have not strict dependence on the nano-belt size under our investigated condition, but their optical limiting behavior is different. The optical limiting mechanism of materials is discussed.

© 2005 Chinese Optics Letters

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