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

被引：23

作者：

Karimullin, K. R. ^{[1
,2
]}

Arzhanov, A. I. ^{[1
,2
]}

Eremchev, I. Yu ^{[1
,3
]}

Kulnitskiy, B. A. ^{[3
,4
]}

Surovtsev, N. V. ^{[5
]}

Naumov, A. V. ^{[1
,2
]}

机构：

[1] Russian Acad Sci, Inst Spect, Lab Elect Spectra Mol, Moscow, Russia

[2] Moscow State Pedag Univ, EV Shpolskii Chair Theoret Phys, Moscow, Russia

[3] Moscow Inst Phys & Technol, Dolgoprudnyi, Russia

[4] Technol Inst Superhard & Novel Carbon Mat, Moscow, Russia

[5] Russian Acad Sci, Siberian Branch, Inst Automat & Electrometry, Novosibirsk, Russia

来源：

LASER PHYSICS | 2019年 / 29卷 / 12期

基金：

俄罗斯基础研究基金会; 俄罗斯科学基金会;

关键词：

quantum dots (QDs); optical dephasing; low temperatures; photon echo; luminescence spectra; electronic microscopy; Raman spectroscopy; TEMPERATURE-DEPENDENCE; SPECTRAL DIFFUSION; INTERMITTENCY; BLINKING;

D O I：

10.1088/1555-6611/ab4bdb

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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.

引用

页数：8

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