Gain dynamics in conjugated polymers at room temperature

Ch Spiegelberg, A. Schülzgen, P. M. Allemand, B. Kippelen, Nasser N Peyghambarian

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We report on stimulated emission and optical gain in BEH-PPV polymer films at room temperature. Performing femtosecond pump-probe experiments we find very fast (≤100 fs) relaxation of excitons within a ladder of vibronic states. From spectra taken at very early times after photoexcitation we identify several vibronic transitions with a linewidth of about 8 nm. Strong coupling of excitons to these vibrations leads to stimulated emission and large optical gain of up to 104 cm-1. For a pump-probe delay of 200 fs the different tiansitions are no longer distinguishable due to broadening through spectral diffusion and exciton migration. The lifetime of the optical gain corresponds to the exciton lifetime. Population depletion by stimulated emission leads to a density dependent decay within a few hundred fs up to about 2 ps.

Original languageEnglish (US)
Pages (from-to)131-138
Number of pages8
JournalPhysica Status Solidi (B) Basic Research
Volume206
Issue number1
StatePublished - Mar 1998

Fingerprint

Conjugated polymers
Excitons
Optical gain
Stimulated emission
stimulated emission
excitons
polymers
room temperature
Pumps
pumps
life (durability)
Temperature
probes
Photoexcitation
Ladders
photoexcitation
Polymer films
ladders
Linewidth
depletion

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Spiegelberg, C., Schülzgen, A., Allemand, P. M., Kippelen, B., & Peyghambarian, N. N. (1998). Gain dynamics in conjugated polymers at room temperature. Physica Status Solidi (B) Basic Research, 206(1), 131-138.

Gain dynamics in conjugated polymers at room temperature. / Spiegelberg, Ch; Schülzgen, A.; Allemand, P. M.; Kippelen, B.; Peyghambarian, Nasser N.

In: Physica Status Solidi (B) Basic Research, Vol. 206, No. 1, 03.1998, p. 131-138.

Research output: Contribution to journalArticle

Spiegelberg, C, Schülzgen, A, Allemand, PM, Kippelen, B & Peyghambarian, NN 1998, 'Gain dynamics in conjugated polymers at room temperature', Physica Status Solidi (B) Basic Research, vol. 206, no. 1, pp. 131-138.
Spiegelberg C, Schülzgen A, Allemand PM, Kippelen B, Peyghambarian NN. Gain dynamics in conjugated polymers at room temperature. Physica Status Solidi (B) Basic Research. 1998 Mar;206(1):131-138.
Spiegelberg, Ch ; Schülzgen, A. ; Allemand, P. M. ; Kippelen, B. ; Peyghambarian, Nasser N. / Gain dynamics in conjugated polymers at room temperature. In: Physica Status Solidi (B) Basic Research. 1998 ; Vol. 206, No. 1. pp. 131-138.
@article{b1a738567eb24c0bb471bb5318554b05,
title = "Gain dynamics in conjugated polymers at room temperature",
abstract = "We report on stimulated emission and optical gain in BEH-PPV polymer films at room temperature. Performing femtosecond pump-probe experiments we find very fast (≤100 fs) relaxation of excitons within a ladder of vibronic states. From spectra taken at very early times after photoexcitation we identify several vibronic transitions with a linewidth of about 8 nm. Strong coupling of excitons to these vibrations leads to stimulated emission and large optical gain of up to 104 cm-1. For a pump-probe delay of 200 fs the different tiansitions are no longer distinguishable due to broadening through spectral diffusion and exciton migration. The lifetime of the optical gain corresponds to the exciton lifetime. Population depletion by stimulated emission leads to a density dependent decay within a few hundred fs up to about 2 ps.",
author = "Ch Spiegelberg and A. Sch{\"u}lzgen and Allemand, {P. M.} and B. Kippelen and Peyghambarian, {Nasser N}",
year = "1998",
month = "3",
language = "English (US)",
volume = "206",
pages = "131--138",
journal = "Physica Status Solidi (B): Basic Research",
issn = "0370-1972",
publisher = "Wiley-VCH Verlag",
number = "1",

}

TY - JOUR

T1 - Gain dynamics in conjugated polymers at room temperature

AU - Spiegelberg, Ch

AU - Schülzgen, A.

AU - Allemand, P. M.

AU - Kippelen, B.

AU - Peyghambarian, Nasser N

PY - 1998/3

Y1 - 1998/3

N2 - We report on stimulated emission and optical gain in BEH-PPV polymer films at room temperature. Performing femtosecond pump-probe experiments we find very fast (≤100 fs) relaxation of excitons within a ladder of vibronic states. From spectra taken at very early times after photoexcitation we identify several vibronic transitions with a linewidth of about 8 nm. Strong coupling of excitons to these vibrations leads to stimulated emission and large optical gain of up to 104 cm-1. For a pump-probe delay of 200 fs the different tiansitions are no longer distinguishable due to broadening through spectral diffusion and exciton migration. The lifetime of the optical gain corresponds to the exciton lifetime. Population depletion by stimulated emission leads to a density dependent decay within a few hundred fs up to about 2 ps.

AB - We report on stimulated emission and optical gain in BEH-PPV polymer films at room temperature. Performing femtosecond pump-probe experiments we find very fast (≤100 fs) relaxation of excitons within a ladder of vibronic states. From spectra taken at very early times after photoexcitation we identify several vibronic transitions with a linewidth of about 8 nm. Strong coupling of excitons to these vibrations leads to stimulated emission and large optical gain of up to 104 cm-1. For a pump-probe delay of 200 fs the different tiansitions are no longer distinguishable due to broadening through spectral diffusion and exciton migration. The lifetime of the optical gain corresponds to the exciton lifetime. Population depletion by stimulated emission leads to a density dependent decay within a few hundred fs up to about 2 ps.

UR - http://www.scopus.com/inward/record.url?scp=0040599088&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0040599088&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0040599088

VL - 206

SP - 131

EP - 138

JO - Physica Status Solidi (B): Basic Research

JF - Physica Status Solidi (B): Basic Research

SN - 0370-1972

IS - 1

ER -