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


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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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).

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