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Nonlinear optical characterization and measurement of optical limiting threshold of CdSe quantum dots prepared by a microemulsion technique

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Abstract

CdSe quantum dots prepared by micro emulsion technique shows quantum confinement effect and broad emission at 532 nm. These quantum dots have about 4.35 nm size, and they exhibit good nonlinear effects which are measured using z-scan technique. The samples have a reverse saturation in the nonlinear absorption as nonlinear optical absorption coefficient β is 2.545 × 10−10 W m−1 and nonlinear optical refraction coefficient n 2 is −1.77 × 10−10 esu. The third-order nonlinear optical susceptibility is found to be 4.646 × 10−11 esu and also the figure of merit is 2.01 × 10−12 esu m. The optical limiting threshold which is found to be 0.346 GW/cm2 makes it a good candidate for device fabrication.

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Acknowledgments

MS acknowledges CELOS (funded by UGC-Government of India) for research fellowship. The authors are grateful to CELOS for some of the experimental facilities.

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Authors and Affiliations

  1. International School of Photonics, Cochin University of Science and Technology, Kochi, 682022, India

    S. Mathew, Santhi Ani Joseph, P. Radhakrishnan, V. P. N. Nampoori & C. P. G. Vallabhan

  2. Centre of Excellence in Lasers and Optoelectronics Sciences, Cochin University of Science and Technology, Kochi, 682022, India

    S. Mathew, Bishwajeet Singh Bhardwaj, Deep Punj & P. Radhakrishnan

  3. Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India

    Amit D. Saran & Jayesh R. Bellare

  4. School of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, 400076, India

    Jayesh R. Bellare

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  1. S. Mathew
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Correspondence to S. Mathew.

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Mathew, S., Saran, A.D., Joseph, S.A. et al. Nonlinear optical characterization and measurement of optical limiting threshold of CdSe quantum dots prepared by a microemulsion technique. J Mater Sci: Mater Electron 23, 739–745 (2012). https://doi.org/10.1007/s10854-011-0481-z

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  • DOI: https://doi.org/10.1007/s10854-011-0481-z

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