Mark J Fernée et al 2004 Nanotechnology 15 1351 doi:10.1088/0957-4484/15/9/040
Mark J Fernée, Andrew Watt, Jamie Warner, Norman Heckenberg and Halina Rubinsztein-Dunlop
Show affiliationsPhotoluminescent emission is observed from surface-passivated PbS nanocrystals following the two-photon excitation of high-energy excitonic states. The emission appears directly at the excitation energy with no detectable Stokes-shift for a wide range of excitation energies. The observation of direct emission from states excited by two-photon absorption indicates that the parity of the excited states of surface-passivated PbS nanocrystals is partially mixed.
78.67.Bf Nanocrystals and nanoparticles
78.55.Hx Other solid inorganic materials
Condensed matter: electrical, magnetic and optical
Issue 9 (September 2004)
Received 9 June 2004
Published 13 August 2004
Mark J Fernée et al 2004 Nanotechnology 15 1351
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