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    • Keywords


      Upconversion photoluminescence; CdTe nanoparticles; femtosecond laser.

    • Abstract


      In this article, we report size-dependent measurement of the shift in peak of upconversion photoluminescence spectra compared to that of normal photoluminescence using a 800 nm femtosecond laser and its second harmonic. It has been shown that the upconversion photoluminescence is always red-shifted compared to that of normal PL in all the samples. By measuring the power-dependent upconversion photoluminescence (UCPL), it has been shown that the origin of UCPL from MPA-capped CdTe nanoparticles is mainly of two-photon absorption

    • Author Affiliations


      S Ananthakumar1 J Jayabalan2 Asha Singh2 Salahuddin Khan2 Subhash Prajapati2 S Moorthy Babu1 Rama Chari2

      1. Crystal Growth Centre, Anna University, Chennai 600 025, India
      2. Laser Physics Applications Section, Raja Ramanna Centre for Advanced Technology, Indore 452 013, India
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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