Three-photon excitation of quantum dots with a telecom-band ultrafast fiber laser
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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 threephoton 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.
Applied Physics B
© 2014 Springer Berlin / Heidelberg. This is an electronic version of an article published in Applied Physics B: Lasers and Optics, December 2014, Volume 117, Issue 4, pp 1035–1039. Applied Physics B: Lasers and Optics is available online at: http://link.springer.com/ with the open URL of your article.
Nonlinear Optics and Spectroscopy