Dephasing processes in II–VI quantum dots

U. Woggon, M. Portuné, C. Klingshirn, H. Giessen, B. Fluegel, G. Mohs, Nasser N Peyghambarian

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The loss of phase coherence in II–VI quantum dots is investigated using experimental methods working both in the frequency and in the time domain. Femtosecond differential absorption experiments reveal narrow resonances at very early times after excitation and low excitation densities for CdSe quantum dots. A substructure is detected and explained by transitions from the series of confined hole states. By nondegenerate four‐wave mixing experiments (NDFWM) the dephasing time is determined for CdS quantum dots with radii larger than the Bohr radius. Temperature and excitation intensity dependent dephasing times between ≈ 20 fs and some 100 fs are measured and attributed to electron‐hole pair–phonon coupling and carrier–carrier scattering.

Original languageEnglish (US)
Pages (from-to)221-227
Number of pages7
Journalphysica status solidi (b)
Volume188
Issue number1
DOIs
StatePublished - 1995

Fingerprint

Semiconductor quantum dots
quantum dots
excitation
radii
phase coherence
substructures
Experiments
Scattering
scattering
Temperature
temperature

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Woggon, U., Portuné, M., Klingshirn, C., Giessen, H., Fluegel, B., Mohs, G., & Peyghambarian, N. N. (1995). Dephasing processes in II–VI quantum dots. physica status solidi (b), 188(1), 221-227. https://doi.org/10.1002/pssb.2221880119

Dephasing processes in II–VI quantum dots. / Woggon, U.; Portuné, M.; Klingshirn, C.; Giessen, H.; Fluegel, B.; Mohs, G.; Peyghambarian, Nasser N.

In: physica status solidi (b), Vol. 188, No. 1, 1995, p. 221-227.

Research output: Contribution to journalArticle

Woggon, U, Portuné, M, Klingshirn, C, Giessen, H, Fluegel, B, Mohs, G & Peyghambarian, NN 1995, 'Dephasing processes in II–VI quantum dots', physica status solidi (b), vol. 188, no. 1, pp. 221-227. https://doi.org/10.1002/pssb.2221880119
Woggon U, Portuné M, Klingshirn C, Giessen H, Fluegel B, Mohs G et al. Dephasing processes in II–VI quantum dots. physica status solidi (b). 1995;188(1):221-227. https://doi.org/10.1002/pssb.2221880119
Woggon, U. ; Portuné, M. ; Klingshirn, C. ; Giessen, H. ; Fluegel, B. ; Mohs, G. ; Peyghambarian, Nasser N. / Dephasing processes in II–VI quantum dots. In: physica status solidi (b). 1995 ; Vol. 188, No. 1. pp. 221-227.
@article{ecafc8253d064077ae179fe0a5d7da83,
title = "Dephasing processes in II–VI quantum dots",
abstract = "The loss of phase coherence in II–VI quantum dots is investigated using experimental methods working both in the frequency and in the time domain. Femtosecond differential absorption experiments reveal narrow resonances at very early times after excitation and low excitation densities for CdSe quantum dots. A substructure is detected and explained by transitions from the series of confined hole states. By nondegenerate four‐wave mixing experiments (NDFWM) the dephasing time is determined for CdS quantum dots with radii larger than the Bohr radius. Temperature and excitation intensity dependent dephasing times between ≈ 20 fs and some 100 fs are measured and attributed to electron‐hole pair–phonon coupling and carrier–carrier scattering.",
author = "U. Woggon and M. Portun{\'e} and C. Klingshirn and H. Giessen and B. Fluegel and G. Mohs and Peyghambarian, {Nasser N}",
year = "1995",
doi = "10.1002/pssb.2221880119",
language = "English (US)",
volume = "188",
pages = "221--227",
journal = "Physica Status Solidi (B): Basic Research",
issn = "0370-1972",
publisher = "Wiley-VCH Verlag",
number = "1",

}

TY - JOUR

T1 - Dephasing processes in II–VI quantum dots

AU - Woggon, U.

AU - Portuné, M.

AU - Klingshirn, C.

AU - Giessen, H.

AU - Fluegel, B.

AU - Mohs, G.

AU - Peyghambarian, Nasser N

PY - 1995

Y1 - 1995

N2 - The loss of phase coherence in II–VI quantum dots is investigated using experimental methods working both in the frequency and in the time domain. Femtosecond differential absorption experiments reveal narrow resonances at very early times after excitation and low excitation densities for CdSe quantum dots. A substructure is detected and explained by transitions from the series of confined hole states. By nondegenerate four‐wave mixing experiments (NDFWM) the dephasing time is determined for CdS quantum dots with radii larger than the Bohr radius. Temperature and excitation intensity dependent dephasing times between ≈ 20 fs and some 100 fs are measured and attributed to electron‐hole pair–phonon coupling and carrier–carrier scattering.

AB - The loss of phase coherence in II–VI quantum dots is investigated using experimental methods working both in the frequency and in the time domain. Femtosecond differential absorption experiments reveal narrow resonances at very early times after excitation and low excitation densities for CdSe quantum dots. A substructure is detected and explained by transitions from the series of confined hole states. By nondegenerate four‐wave mixing experiments (NDFWM) the dephasing time is determined for CdS quantum dots with radii larger than the Bohr radius. Temperature and excitation intensity dependent dephasing times between ≈ 20 fs and some 100 fs are measured and attributed to electron‐hole pair–phonon coupling and carrier–carrier scattering.

UR - http://www.scopus.com/inward/record.url?scp=84892247245&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84892247245&partnerID=8YFLogxK

U2 - 10.1002/pssb.2221880119

DO - 10.1002/pssb.2221880119

M3 - Article

AN - SCOPUS:84892247245

VL - 188

SP - 221

EP - 227

JO - Physica Status Solidi (B): Basic Research

JF - Physica Status Solidi (B): Basic Research

SN - 0370-1972

IS - 1

ER -