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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H. Kanazawa and S. Adachi, J. Appl. Phys. 83, 5997 (1998).

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T. Takagahara, Phys. Rev. B 47, 4569 (1993).

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D. Cotter, M. G. Burt, and R. J. Manning, Phys. Rev. Lett. 68, 1200 (1992).

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M. Sheik-Bahae, A. A. Said, T. H. Wei, D. J. Hagan, and E. W. Van Stryland, IEEE J. Quantum Electron. 26, 760 (1990).

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N. Chestnoy, T. D. Harris, R. Hull, and L. E. Brus, J. Phys. Chem. 90, 3393 (1986).

IEEE J. Quantum Electron.

M. Sheik-Bahae, A. A. Said, T. H. Wei, D. J. Hagan, and E. W. Van Stryland, IEEE J. Quantum Electron. 26, 760 (1990).

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H. Kanazawa and S. Adachi, J. Appl. Phys. 83, 5997 (1998).

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N. Chestnoy, T. D. Harris, R. Hull, and L. E. Brus, J. Phys. Chem. 90, 3393 (1986).

Phys. Rev. B

T. Takagahara, Phys. Rev. B 47, 4569 (1993).

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D. Cotter, M. G. Burt, and R. J. Manning, Phys. Rev. Lett. 68, 1200 (1992).

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