Chapter

Spectroscopy of single semiconductor nanocrystals

Ivan Pelant and Jan Valenta

in Luminescence Spectroscopy of Semiconductors

Published in print February 2012 | ISBN: 9780199588336
Published online May 2012 | e-ISBN: 9780191738548 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199588336.003.0017
Spectroscopy of single semiconductor nanocrystals

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Spectroscopy of single semiconductor nanocrystals deals in detail how to remove the inevitable inhomogeneous spectral broadening when, as it is common, an ensemble of nano-object is investigated. At first, dedicated experimental set-ups applied to acquire luminescence spectra from individual nanocrystals like wide-field micro-spectroscopy and scanning techniques (laser confocal microscope, scanning near-field optical microscope, scanning tunnelling optical microscope) are discussed. Then suitable sample preparation methods are outlined. Next, a number of representative examples of exceptional phenomena observed in individual luminescence spectra are analyzed: hidden fine structure, spectral diffusion, Stark effect, and luminescence polarization from nanocrystals and nanowires. Luminescence intermittency–blinking is discussed at length including statistical processing of the data. Finally, methods to measure photon statistics from individual nanocrystals are explained and nanocrystals are seen as sources of non-classical photon flux.

Keywords: inhomogeneous broadening; wide-field micro-spectroscopy; scanning techniques; spectral diffusion; Stark effect; luminescence polarization; intermittency–blinking; photon statistics; non-classical photon flux

Chapter.  15771 words.  Illustrated.

Subjects: Atomic, Molecular, and Optical Physics

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