Stripe excitation of high gain media with disorder

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We discuss the spatial and spectral intensity distribution of emission in optical gain media under stripe excitation in the case where the intensity reaches saturation level. It is found that modes propagating along the stripe in different directions are spatially separated if they affect each other due to saturation. The investigation includes the effects of wavelength-dependent inhomogenities, such as localized losses and reflective perturbations. Even relatively small distortions of this kind are found to cause considerable spatial and spectral redistribution of the intensity compared to an ideal disorder-free medium. Our results indicate that a simple ansatz may describe some mechanisms that lead to the formation of random laser action that is commonly observed in high gain media, such as organic semiconductors. Furthermore, consequential difficulties of gain measurements in such media using stripe excitation experiments are highlighted.
Original languageEnglish
Pages (from-to)1184-1192
Number of pages9
JournalIEEE Journal of Quantum Electronics
Volume48
Issue number9
DOIs
Publication statusPublished - Sep 2012

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Gain measurement
Optical gain
Semiconducting organic compounds
high gain
disorders
Wavelength
Lasers
excitation
Experiments
saturation
organic semiconductors
perturbation
causes
wavelengths
lasers

Keywords

  • photonics
  • organic semiconductor
  • photoexcitation
  • solid lasers
  • optical materials

Cite this

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title = "Stripe excitation of high gain media with disorder",
abstract = "We discuss the spatial and spectral intensity distribution of emission in optical gain media under stripe excitation in the case where the intensity reaches saturation level. It is found that modes propagating along the stripe in different directions are spatially separated if they affect each other due to saturation. The investigation includes the effects of wavelength-dependent inhomogenities, such as localized losses and reflective perturbations. Even relatively small distortions of this kind are found to cause considerable spatial and spectral redistribution of the intensity compared to an ideal disorder-free medium. Our results indicate that a simple ansatz may describe some mechanisms that lead to the formation of random laser action that is commonly observed in high gain media, such as organic semiconductors. Furthermore, consequential difficulties of gain measurements in such media using stripe excitation experiments are highlighted.",
keywords = "photonics, organic semiconductor, photoexcitation, solid lasers, optical materials",
author = "Johannes Herrnsdorf and Yujie Chen and Guilhabert, {Benoit Jack Eloi} and Nicolas Laurand and Martin Dawson",
year = "2012",
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language = "English",
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pages = "1184--1192",
journal = "IEEE Journal of Quantum Electronics",
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Stripe excitation of high gain media with disorder. / Herrnsdorf, Johannes; Chen, Yujie; Guilhabert, Benoit Jack Eloi; Laurand, Nicolas; Dawson, Martin.

In: IEEE Journal of Quantum Electronics, Vol. 48, No. 9, 09.2012, p. 1184-1192.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Stripe excitation of high gain media with disorder

AU - Herrnsdorf, Johannes

AU - Chen, Yujie

AU - Guilhabert, Benoit Jack Eloi

AU - Laurand, Nicolas

AU - Dawson, Martin

PY - 2012/9

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N2 - We discuss the spatial and spectral intensity distribution of emission in optical gain media under stripe excitation in the case where the intensity reaches saturation level. It is found that modes propagating along the stripe in different directions are spatially separated if they affect each other due to saturation. The investigation includes the effects of wavelength-dependent inhomogenities, such as localized losses and reflective perturbations. Even relatively small distortions of this kind are found to cause considerable spatial and spectral redistribution of the intensity compared to an ideal disorder-free medium. Our results indicate that a simple ansatz may describe some mechanisms that lead to the formation of random laser action that is commonly observed in high gain media, such as organic semiconductors. Furthermore, consequential difficulties of gain measurements in such media using stripe excitation experiments are highlighted.

AB - We discuss the spatial and spectral intensity distribution of emission in optical gain media under stripe excitation in the case where the intensity reaches saturation level. It is found that modes propagating along the stripe in different directions are spatially separated if they affect each other due to saturation. The investigation includes the effects of wavelength-dependent inhomogenities, such as localized losses and reflective perturbations. Even relatively small distortions of this kind are found to cause considerable spatial and spectral redistribution of the intensity compared to an ideal disorder-free medium. Our results indicate that a simple ansatz may describe some mechanisms that lead to the formation of random laser action that is commonly observed in high gain media, such as organic semiconductors. Furthermore, consequential difficulties of gain measurements in such media using stripe excitation experiments are highlighted.

KW - photonics

KW - organic semiconductor

KW - photoexcitation

KW - solid lasers

KW - optical materials

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