Observation of enhanced biexcitonic effect in semiconductor nanocrystals

Seung Han Park, Young Nam Hwang, Dongho Kim, Koo Chul Je

Research output: Contribution to journalArticle

Abstract

We have observed enhanced biexcitonic effect in (formula presented) nanocrystals by means of femtosecond two-photon pump-probe spectroscopy. In contrast to a weak biexcitonic photoinduced absorption in the presence of (formula presented) or (formula presented) excitons due to one-photon excitation, we have found a pronounced photoinduced absorption arising from a strong Coulomb coupling between a (formula presented) exciton and a two-photon excited (formula presented) exciton. We have also theoretically shown that (formula presented) biexcitons have a large binding energy compared with (formula presented) and (formula presented) biexciton states.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume64
Issue number4
DOIs
Publication statusPublished - 2001 Jan 1

Fingerprint

Excitons
Nanocrystals
nanocrystals
Photons
Semiconductor materials
Binding energy
excitons
Pumps
Spectroscopy
photons
LDS 751
binding energy
pumps
probes
spectroscopy
excitation

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

@article{aea532a001d04554a0cf783e9461f619,
title = "Observation of enhanced biexcitonic effect in semiconductor nanocrystals",
abstract = "We have observed enhanced biexcitonic effect in (formula presented) nanocrystals by means of femtosecond two-photon pump-probe spectroscopy. In contrast to a weak biexcitonic photoinduced absorption in the presence of (formula presented) or (formula presented) excitons due to one-photon excitation, we have found a pronounced photoinduced absorption arising from a strong Coulomb coupling between a (formula presented) exciton and a two-photon excited (formula presented) exciton. We have also theoretically shown that (formula presented) biexcitons have a large binding energy compared with (formula presented) and (formula presented) biexciton states.",
author = "Park, {Seung Han} and Hwang, {Young Nam} and Dongho Kim and Je, {Koo Chul}",
year = "2001",
month = "1",
day = "1",
doi = "10.1103/PhysRevB.64.041305",
language = "English",
volume = "64",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
number = "4",

}

Observation of enhanced biexcitonic effect in semiconductor nanocrystals. / Park, Seung Han; Hwang, Young Nam; Kim, Dongho; Je, Koo Chul.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 64, No. 4, 01.01.2001.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Observation of enhanced biexcitonic effect in semiconductor nanocrystals

AU - Park, Seung Han

AU - Hwang, Young Nam

AU - Kim, Dongho

AU - Je, Koo Chul

PY - 2001/1/1

Y1 - 2001/1/1

N2 - We have observed enhanced biexcitonic effect in (formula presented) nanocrystals by means of femtosecond two-photon pump-probe spectroscopy. In contrast to a weak biexcitonic photoinduced absorption in the presence of (formula presented) or (formula presented) excitons due to one-photon excitation, we have found a pronounced photoinduced absorption arising from a strong Coulomb coupling between a (formula presented) exciton and a two-photon excited (formula presented) exciton. We have also theoretically shown that (formula presented) biexcitons have a large binding energy compared with (formula presented) and (formula presented) biexciton states.

AB - We have observed enhanced biexcitonic effect in (formula presented) nanocrystals by means of femtosecond two-photon pump-probe spectroscopy. In contrast to a weak biexcitonic photoinduced absorption in the presence of (formula presented) or (formula presented) excitons due to one-photon excitation, we have found a pronounced photoinduced absorption arising from a strong Coulomb coupling between a (formula presented) exciton and a two-photon excited (formula presented) exciton. We have also theoretically shown that (formula presented) biexcitons have a large binding energy compared with (formula presented) and (formula presented) biexciton states.

UR - http://www.scopus.com/inward/record.url?scp=85038331810&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85038331810&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.64.041305

DO - 10.1103/PhysRevB.64.041305

M3 - Article

VL - 64

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 4

ER -