Three-photon excitation of quantum dots with a telecom-band ultrafast fiber laser

Abstract

We demonstrate three-photon excitation in quantum dots with a mode-locked fiber laser operating in the telecommunications band. We compare spectra and intensity dependence of fluorescence from one- and three-photon excitation of commercially available 640-nm quantum dots, using a 372-nm diode laser for one-photon excitation and 116-fs pulses from a mode-locked fiber laser with a center wavelength of 1,575 nm for three-photon excitation.

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Acknowledgments

D.K. was supported by an Australian Research Council Future Fellowship (FT110100513). We would like to acknowledge Prof. Jay L. Nadeau of McGill University for sparking our interest in the area.

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Correspondence to M. J. Petrasiunas.

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Petrasiunas, M.J., Wood, J.B.O., Kielpinski, D. et al. Three-photon excitation of quantum dots with a telecom-band ultrafast fiber laser. Appl. Phys. B 117, 1035–1039 (2014). https://doi.org/10.1007/s00340-014-5924-9

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Keywords

  • Fiber Laser
  • Excitation Intensity
  • Energy Level Structure
  • Bleaching Rate
  • Linear Excitation