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Research PapersNo Access

OPTICAL NONLINEARITY OF CdSe AND CdSe-C₆₀ QUANTUM DOT

Department of Physics, Wuhan University, Wuhan 430072, China

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Department of Physics, Wuhan University, Wuhan 430072, China

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Department of Physics, Wuhan University, Wuhan 430072, China

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Department of Physics, Wuhan University, Wuhan 430072, China

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Department of Physics, Wuhan University, Wuhan 430072, China

Corresponding author.

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https://doi.org/10.1142/S0217984908017734Cited by:3 (Source: Crossref)

Abstract

The third-order optical nonlinear properties of CdSe quantum dots (QDs) and CdSe-C₆₀ QDs are investigated by Z-scan technique with picosecond pulses at the wavelength of 800 nm. The value of the nonlinear absorption coefficient β of CdSe-C₆₀ QDs is measured to be 2.9 cm/GW, which is about two times larger than that of CdSe QDs. The nonlinear refraction index γ of CdSe-C₆₀ QDs is -2.8 × 10^-3cm²/GW, which is about seven times larger than that of CdSe QDs. Presence of C₆₀ contributes to the larger optical nonlinearity of CdSe-C₆₀ QDs comparing with CdSe QDs.

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Vol. 22, No. 32

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Received 11 March 2008

Revised 13 March 2008

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