Laser Physics, volume 29, issue 12, pages 124009

Combined photon-echo, luminescence and Raman spectroscopies of layered ensembles of colloidal quantum dots

Kamil Karimullin ^{1, 2}

Artem I. Arzhanov ^{1, 2}

I.Yu. Eremchev ^{2, 3}

Boris A. Kulnitskiy ³

N.V. Surovtsev ⁴

A. V. Naumov ^{1, 2}

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E.V. Shpol’skii Chair of Theoretical Physics, Moscow State Pedagogical University, Moscow, Russia |

Laboratory of Electronic Spectra of Molecules, Institute for Spectroscopy of the Russian Academy of Sciences, Moscow, Russia |

Moscow Institute of Physics and Technology, Dolgoprudny, Russia |

⁴

Institute of Automation and Electrometry of the Siberian Branch of the Russian Academy of Sciences,Novosibirsk,Russia |

Publication type: Journal Article

Publication date: 2019-10-25

IOP Publishing

Journal: Laser Physics

scimago Q3

SJR: 0.291

CiteScore: 2.6

Impact factor: 1.2

ISSN: 1054660X, 15556611

DOI: 10.1088/1555-6611/ab4bdb

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Atomic and Molecular Physics, and Optics

Condensed Matter Physics

Instrumentation

Industrial and Manufacturing Engineering

Abstract

Low-temperature dynamics in layered ensembles of core-double-shell colloidal CdSe/CdS/ZnS quantum dots is studied using different experimental techniques, including photoluminescence and absorption spectroscopy, luminescence microscopy, photon echo, transmission electronic microscopy and Raman scattering. A combination of different techniques clarify the nature and hierarchy of relaxation processes in the quantum dot (QD)-composite under study for a broad range of temperatures and timescales. The parameters of local phonons in QDs was found coincident by luminescence and Raman spectroscopies. Different contributions to optical spectra broadening has been recognized and attributed to certain properties of QDs: quantum size effect, electron-phonon coupling, spectral diffusion and natural excited state lifetime.

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Publisher

IOP Publishing

Journal

Laser Physics

scimago Q3

SJR

0.291

CiteScore

2.6

Impact factor

1.2

ISSN

1054660X (Print)

15556611 (Electronic)

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Combined photon-echo, luminescence and Raman spectroscopies of layered ensembles of colloidal quantum dots

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