Femtosecond dynamics of fluoro-aluminum phthalocyanine and linear alkane molecules

Z. Z. Ho, V. Williams, Nasser N Peyghambarian, W. M. Hetherington

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The dynamics of fluoro-aluminum phthalocyanine polycrystalline thin films is studied using differential transmission spectroscopy with femtosecond laser pulses. Following excitation by 620 nm pulses into the first electronic transition a very rapid energy redistribution of the excitons is directly observed within the 55 fs duration of the pump pulse. Following this process two extremely fast decay routes lead to the recovery of the ground state: exciton-exciton annihilation with an intensity dependentdecay of 550 fs at power density of 1.2 GW/cm 2 and exciton-phonon coupling with a 4 ps decay time. A complete interpretation of the decay mechanisms based on the Frenkel exciton terminology successfully accounts for the observed results.

Original languageEnglish (US)
Pages (from-to)51-58
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume971
DOIs
StatePublished - Dec 21 1988

Fingerprint

Phthalocyanine
Alkanes
Femtosecond
Exciton
Excitons
Paraffins
Aluminum
alkanes
excitons
Molecules
aluminum
molecules
Decay
decay
pulses
Femtosecond Laser Pulses
terminology
Redistribution
Phonon
Terminology

ASJC Scopus subject areas

  • Applied Mathematics
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Computer Science Applications

Cite this

Femtosecond dynamics of fluoro-aluminum phthalocyanine and linear alkane molecules. / Ho, Z. Z.; Williams, V.; Peyghambarian, Nasser N; Hetherington, W. M.

In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 971, 21.12.1988, p. 51-58.

Research output: Contribution to journalArticle

@article{27ae5fb1e1ab4be6af289a5078877f87,
title = "Femtosecond dynamics of fluoro-aluminum phthalocyanine and linear alkane molecules",
abstract = "The dynamics of fluoro-aluminum phthalocyanine polycrystalline thin films is studied using differential transmission spectroscopy with femtosecond laser pulses. Following excitation by 620 nm pulses into the first electronic transition a very rapid energy redistribution of the excitons is directly observed within the 55 fs duration of the pump pulse. Following this process two extremely fast decay routes lead to the recovery of the ground state: exciton-exciton annihilation with an intensity dependentdecay of 550 fs at power density of 1.2 GW/cm 2 and exciton-phonon coupling with a 4 ps decay time. A complete interpretation of the decay mechanisms based on the Frenkel exciton terminology successfully accounts for the observed results.",
author = "Ho, {Z. Z.} and V. Williams and Peyghambarian, {Nasser N} and Hetherington, {W. M.}",
year = "1988",
month = "12",
day = "21",
doi = "10.1117/12.948265",
language = "English (US)",
volume = "971",
pages = "51--58",
journal = "Proceedings of SPIE - The International Society for Optical Engineering",
issn = "0277-786X",
publisher = "SPIE",

}

TY - JOUR

T1 - Femtosecond dynamics of fluoro-aluminum phthalocyanine and linear alkane molecules

AU - Ho, Z. Z.

AU - Williams, V.

AU - Peyghambarian, Nasser N

AU - Hetherington, W. M.

PY - 1988/12/21

Y1 - 1988/12/21

N2 - The dynamics of fluoro-aluminum phthalocyanine polycrystalline thin films is studied using differential transmission spectroscopy with femtosecond laser pulses. Following excitation by 620 nm pulses into the first electronic transition a very rapid energy redistribution of the excitons is directly observed within the 55 fs duration of the pump pulse. Following this process two extremely fast decay routes lead to the recovery of the ground state: exciton-exciton annihilation with an intensity dependentdecay of 550 fs at power density of 1.2 GW/cm 2 and exciton-phonon coupling with a 4 ps decay time. A complete interpretation of the decay mechanisms based on the Frenkel exciton terminology successfully accounts for the observed results.

AB - The dynamics of fluoro-aluminum phthalocyanine polycrystalline thin films is studied using differential transmission spectroscopy with femtosecond laser pulses. Following excitation by 620 nm pulses into the first electronic transition a very rapid energy redistribution of the excitons is directly observed within the 55 fs duration of the pump pulse. Following this process two extremely fast decay routes lead to the recovery of the ground state: exciton-exciton annihilation with an intensity dependentdecay of 550 fs at power density of 1.2 GW/cm 2 and exciton-phonon coupling with a 4 ps decay time. A complete interpretation of the decay mechanisms based on the Frenkel exciton terminology successfully accounts for the observed results.

UR - http://www.scopus.com/inward/record.url?scp=84913416467&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84913416467&partnerID=8YFLogxK

U2 - 10.1117/12.948265

DO - 10.1117/12.948265

M3 - Article

VL - 971

SP - 51

EP - 58

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

SN - 0277-786X

ER -