Negative circular polarization of InP QD luminescence: Mechanism of formation and main regularities

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16 Citations (Scopus)

Abstract

The spectrum and kinetics of the circular polarization of InP quantum dot (QD) photoluminescence have been experimentally investigated under different conditions of optical excitation and at different bias voltages applied to the sample. It is established that, at a bias of about -0.1 V, the degree of photoluminescence polarization is negative and reaches -50% in limiting cases. It is concluded that the negative polarization is formed in QDs containing one recident electron per dot and is mainly caused by the optical orientation of the electron spin. It is shown that all experimentally observed regularities are well described in the framework of the model assuming the energy relaxation of photogenerated electron-hole pairs accompanied by the electron- hole spin flip-flop process.

Original languageEnglish
Pages (from-to)375-387
Number of pages13
JournalOptics and Spectroscopy (English translation of Optika i Spektroskopiya)
Volume106
Issue number3
DOIs
Publication statusPublished - Mar 2009

Fingerprint

Circular polarization
circular polarization
regularity
Semiconductor quantum dots
Luminescence
quantum dots
luminescence
photoluminescence
flip-flops
Electrons
polarization
electron spin
Photoluminescence
Polarization
Flip flop circuits
Photoexcitation
kinetics
electric potential
Bias voltage
excitation

Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

Cite this

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title = "Negative circular polarization of InP QD luminescence: Mechanism of formation and main regularities",
abstract = "The spectrum and kinetics of the circular polarization of InP quantum dot (QD) photoluminescence have been experimentally investigated under different conditions of optical excitation and at different bias voltages applied to the sample. It is established that, at a bias of about -0.1 V, the degree of photoluminescence polarization is negative and reaches -50{\%} in limiting cases. It is concluded that the negative polarization is formed in QDs containing one recident electron per dot and is mainly caused by the optical orientation of the electron spin. It is shown that all experimentally observed regularities are well described in the framework of the model assuming the energy relaxation of photogenerated electron-hole pairs accompanied by the electron- hole spin flip-flop process.",
author = "Ignatiev, {I. V.} and Verbin, {S. Yu} and Gerlovin, {I. Ya} and Cherbunin, {R. V.} and Y. Masumoto",
year = "2009",
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language = "English",
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pages = "375--387",
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T1 - Negative circular polarization of InP QD luminescence

T2 - Mechanism of formation and main regularities

AU - Ignatiev, I. V.

AU - Verbin, S. Yu

AU - Gerlovin, I. Ya

AU - Cherbunin, R. V.

AU - Masumoto, Y.

PY - 2009/3

Y1 - 2009/3

N2 - The spectrum and kinetics of the circular polarization of InP quantum dot (QD) photoluminescence have been experimentally investigated under different conditions of optical excitation and at different bias voltages applied to the sample. It is established that, at a bias of about -0.1 V, the degree of photoluminescence polarization is negative and reaches -50% in limiting cases. It is concluded that the negative polarization is formed in QDs containing one recident electron per dot and is mainly caused by the optical orientation of the electron spin. It is shown that all experimentally observed regularities are well described in the framework of the model assuming the energy relaxation of photogenerated electron-hole pairs accompanied by the electron- hole spin flip-flop process.

AB - The spectrum and kinetics of the circular polarization of InP quantum dot (QD) photoluminescence have been experimentally investigated under different conditions of optical excitation and at different bias voltages applied to the sample. It is established that, at a bias of about -0.1 V, the degree of photoluminescence polarization is negative and reaches -50% in limiting cases. It is concluded that the negative polarization is formed in QDs containing one recident electron per dot and is mainly caused by the optical orientation of the electron spin. It is shown that all experimentally observed regularities are well described in the framework of the model assuming the energy relaxation of photogenerated electron-hole pairs accompanied by the electron- hole spin flip-flop process.

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