NDLI: Homogeneous linewidth in CdSe/ZnS core/shell nanocrystals

Content Provider	IEEE Xplore Digital Library
Author	Palinginis, P. Hailin Wang
Copyright Year	2001
Description	Author affiliation: Dept. of Phys., Oregon Univ., Eugene, OR, USA (Palinginis, P.; Hailin Wang)
Abstract	Summary form only given. Understanding dephasing in quantum dots, especially dephasing due to electron-phonon interactions, is essential for the use of quantum dots as artificial atoms in applications such as quantum information processing. In this paper, we report experimental studies on dephasing in CdSe/ZnS core/shell nanocrystals using high resolution spectral hole burning. These studies not only allow us to determine the homogeneous linewidth, but also reveal directly discrete acoustic phonon sidebands. The extremely small homogeneous linewidth (32 /spl mu/eV) obtained at low temperature along with the nonlinear temperature dependence of the homogeneous linewidth indicates that the quantization of acoustic phonon modes leads to strong suppression of dephasing associated with electron-phonon interactions in nanocrystals. The dependence of the spectral hole width on the modulation frequency also reveals exciton spectral migration occurring on a time scale of order of 100 /spl mu/s.
Sponsorship	APS/Div. Laser Sci.
Starting Page	3
Ending Page	4
File Size	259957
Page Count	2
File Format	PDF
ISBN	155752663X
DOI	10.1109/QELS.2001.961771
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-05-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Optical Soc. Of America
Subject Keyword	Zinc compounds Temperature dependence Frequency modulation Nanocrystals Quantum dots Phonons Information processing Charge carrier processes Quantization Nonlinear acoustics
Content Type	Text
Resource Type	Article

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