Spontaneous Spectral Diffusion in CdSe Quantum Dots

Mark J. Fernee; Taras Plakhotnik; Yann Louyer; Bradley N. Littleton; Christian Potzner; Philippe Tamarat; Paul Mulvaney; Brahim Lounis

doi:10.1021/jz300456h

Spontaneous Spectral Diffusion in CdSe Quantum Dots

Mark J. Fernee^*, Taras Plakhotnik, Yann Louyer, Bradley N. Littleton, Christian Potzner, Philippe Tamarat, Paul Mulvaney, Brahim Lounis

^*Corresponding author for this work

Physics

Research output: Contribution to journal › Article › peer-review

60 Citations (Scopus)

Abstract

Spectral diffusion of the emission line of single colloidal nanocrystals is generally regarded as a random process. Here, we show that each new spectral position has a finite memory of previous spectral positions, as evidenced by persistent anticorrelations in time series of spectral jumps. The anticorrelation indicates that there is an enhanced probability of the charge distribution around the nanocrystal returning to a previous configuration. We show both statistically and directly that this memory manifests as an observable spontaneous "relaxation" in the absence of a pump laser, so that spectral diffusion progresses in a manner of "two steps forward and one step back".

Original language	English
Article number	N/A
Pages (from-to)	1716-1720
Number of pages	5
Journal	Journal of physical chemistry letters
Volume	3
Issue number	12
DOIs	https://doi.org/10.1021/jz300456h
Publication status	Published - 21 Jun 2012

Keywords

SEMICONDUCTOR NANOCRYSTALS
SURFACE TRAPS
SINGLE
INTERMITTENCY
SPECTROSCOPY
BLINKING
EMISSION

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10.1021/jz300456h

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title = "Spontaneous Spectral Diffusion in CdSe Quantum Dots",

abstract = "Spectral diffusion of the emission line of single colloidal nanocrystals is generally regarded as a random process. Here, we show that each new spectral position has a finite memory of previous spectral positions, as evidenced by persistent anticorrelations in time series of spectral jumps. The anticorrelation indicates that there is an enhanced probability of the charge distribution around the nanocrystal returning to a previous configuration. We show both statistically and directly that this memory manifests as an observable spontaneous {"}relaxation{"} in the absence of a pump laser, so that spectral diffusion progresses in a manner of {"}two steps forward and one step back{"}.",

keywords = "SEMICONDUCTOR NANOCRYSTALS, SURFACE TRAPS, SINGLE, INTERMITTENCY, SPECTROSCOPY, BLINKING, EMISSION",

author = "Fernee, {Mark J.} and Taras Plakhotnik and Yann Louyer and Littleton, {Bradley N.} and Christian Potzner and Philippe Tamarat and Paul Mulvaney and Brahim Lounis",

year = "2012",

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day = "21",

doi = "10.1021/jz300456h",

language = "English",

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journal = "Journal of physical chemistry letters",

issn = "1948-7185",

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T1 - Spontaneous Spectral Diffusion in CdSe Quantum Dots

AU - Fernee, Mark J.

AU - Plakhotnik, Taras

AU - Louyer, Yann

AU - Littleton, Bradley N.

AU - Potzner, Christian

AU - Tamarat, Philippe

AU - Mulvaney, Paul

AU - Lounis, Brahim

PY - 2012/6/21

Y1 - 2012/6/21

N2 - Spectral diffusion of the emission line of single colloidal nanocrystals is generally regarded as a random process. Here, we show that each new spectral position has a finite memory of previous spectral positions, as evidenced by persistent anticorrelations in time series of spectral jumps. The anticorrelation indicates that there is an enhanced probability of the charge distribution around the nanocrystal returning to a previous configuration. We show both statistically and directly that this memory manifests as an observable spontaneous "relaxation" in the absence of a pump laser, so that spectral diffusion progresses in a manner of "two steps forward and one step back".

AB - Spectral diffusion of the emission line of single colloidal nanocrystals is generally regarded as a random process. Here, we show that each new spectral position has a finite memory of previous spectral positions, as evidenced by persistent anticorrelations in time series of spectral jumps. The anticorrelation indicates that there is an enhanced probability of the charge distribution around the nanocrystal returning to a previous configuration. We show both statistically and directly that this memory manifests as an observable spontaneous "relaxation" in the absence of a pump laser, so that spectral diffusion progresses in a manner of "two steps forward and one step back".

KW - SEMICONDUCTOR NANOCRYSTALS

KW - SURFACE TRAPS

KW - SINGLE

KW - INTERMITTENCY

KW - SPECTROSCOPY

KW - BLINKING

KW - EMISSION

U2 - 10.1021/jz300456h

DO - 10.1021/jz300456h

M3 - Article

SN - 1948-7185

VL - 3

SP - 1716

EP - 1720

JO - Journal of physical chemistry letters

JF - Journal of physical chemistry letters

IS - 12

M1 - N/A

ER -

Spontaneous Spectral Diffusion in CdSe Quantum Dots

Abstract

Keywords

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