Measuring and structuring the spatial coherence length of organic light-emitting diodes

Guohua Xie; Mingzhou Chen; Michael Mazilu; Shuyu Zhang; Ashu Kumar Bansal; Kishan Dholakia; Ifor David William Samuel

doi:10.1002/lpor.201500065

Measuring and structuring the spatial coherence length of organic light-emitting diodes

Guohua Xie, Mingzhou Chen, Michael Mazilu, Shuyu Zhang, Ashu Kumar Bansal, Kishan Dholakia, Ifor David William Samuel

Research output: Contribution to journal › Article › peer-review

Abstract

The spatial coherence of organic light-emitting diodes (OLEDs) is an important parameter that has gained little attention to date. Here we present a method for making quantitative measurements of the spatial coherence of OLEDs using a Young’s double-slit experiment. The usefulness of the method is demonstrated by making measurements on a range of OLEDs with different emitters (iridium and europium complexes) and architectures (bottom- and top-emitting) and the fringe visibility is further manipulated by gratings embedded in external diffractive optical elements. Based on the experiments and simulation of the results, we quantitatively determine the spatial coherence lengths of several OLEDs and find them to be a few micrometers. A 60% increase in the spatial coherence length was observed when using a narrow bandwidth emitter and a metal-coated grating.

Original language	English
Pages (from-to)	82-90
Journal	Laser & Photonics Reviews
Volume	10
Issue number	1
DOIs	https://doi.org/10.1002/lpor.201500065
Publication status	Published - Jan 2016

Keywords

OLED
Double-slit experiment
Spatial coherence length
Diffractive optical element

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10.1002/lpor.201500065Licence: CC BY

Xie_et_al_2016_LPR_MeasuringOLEDs_CCBY
© 2015 The Authors. Laser & Photonics Reviews published by WILEY-VCH Verlag GmbH & Co. KGaA Weinheim. This is an open access article under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Final published version, 1.71 MBLicence: CC BY

Ultra-parallel visable light communicati: UK Visible Light Communications
Samuel, I. D. W. (PI) & Turnbull, G. (CoI)
EPSRC
1/10/12 → 28/02/17
Project: Standard
Challening the Limits of Photonics: stru: Challenging the Limits of Photonics: Structured Light
Dholakia, K. (PI), Krauss, T. F. (CoI) & Samuel, I. D. W. (CoI)
EPSRC
1/06/12 → 31/05/17
Project: Standard

Data underpinning - Measuring and structuring the spatial coherence length of organic light-emitting diodes
Xie, G. (Creator), Chen, M. (Creator), Mazilu, M. (Creator), Zhang, S. (Creator), Bansal, A. K. (Creator), Dholakia, K. (Creator) & Samuel, I. D. W. (Creator), University of St Andrews, 11 Jan 2016
DOI: 10.17630/73B69CB8-BA6C-4D71-9985-E723E932C337
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Cite this

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title = "Measuring and structuring the spatial coherence length of organic light-emitting diodes",

abstract = "The spatial coherence of organic light-emitting diodes (OLEDs) is an important parameter that has gained little attention to date. Here we present a method for making quantitative measurements of the spatial coherence of OLEDs using a Young{\textquoteright}s double-slit experiment. The usefulness of the method is demonstrated by making measurements on a range of OLEDs with different emitters (iridium and europium complexes) and architectures (bottom- and top-emitting) and the fringe visibility is further manipulated by gratings embedded in external diffractive optical elements. Based on the experiments and simulation of the results, we quantitatively determine the spatial coherence lengths of several OLEDs and find them to be a few micrometers. A 60% increase in the spatial coherence length was observed when using a narrow bandwidth emitter and a metal-coated grating.",

keywords = "OLED, Double-slit experiment, Spatial coherence length, Diffractive optical element",

author = "Guohua Xie and Mingzhou Chen and Michael Mazilu and Shuyu Zhang and Bansal, {Ashu Kumar} and Kishan Dholakia and Samuel, {Ifor David William}",

note = "This work was supported by the Engineering and Physical Science Research Council (EPSRC) grants “Challenging the limits of photonics: structured light” EP/J01771X and “Ultra-parallel visible light communications” EP/K00042X. IDWS and KD also acknowledge Royal Society Wolfson Research Merit awards. ",

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language = "English",

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journal = "Laser & Photonics Reviews",

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T1 - Measuring and structuring the spatial coherence length of organic light-emitting diodes

AU - Xie, Guohua

AU - Chen, Mingzhou

AU - Mazilu, Michael

AU - Zhang, Shuyu

AU - Bansal, Ashu Kumar

AU - Dholakia, Kishan

AU - Samuel, Ifor David William

N1 - This work was supported by the Engineering and Physical Science Research Council (EPSRC) grants “Challenging the limits of photonics: structured light” EP/J01771X and “Ultra-parallel visible light communications” EP/K00042X. IDWS and KD also acknowledge Royal Society Wolfson Research Merit awards.

PY - 2016/1

Y1 - 2016/1

N2 - The spatial coherence of organic light-emitting diodes (OLEDs) is an important parameter that has gained little attention to date. Here we present a method for making quantitative measurements of the spatial coherence of OLEDs using a Young’s double-slit experiment. The usefulness of the method is demonstrated by making measurements on a range of OLEDs with different emitters (iridium and europium complexes) and architectures (bottom- and top-emitting) and the fringe visibility is further manipulated by gratings embedded in external diffractive optical elements. Based on the experiments and simulation of the results, we quantitatively determine the spatial coherence lengths of several OLEDs and find them to be a few micrometers. A 60% increase in the spatial coherence length was observed when using a narrow bandwidth emitter and a metal-coated grating.

AB - The spatial coherence of organic light-emitting diodes (OLEDs) is an important parameter that has gained little attention to date. Here we present a method for making quantitative measurements of the spatial coherence of OLEDs using a Young’s double-slit experiment. The usefulness of the method is demonstrated by making measurements on a range of OLEDs with different emitters (iridium and europium complexes) and architectures (bottom- and top-emitting) and the fringe visibility is further manipulated by gratings embedded in external diffractive optical elements. Based on the experiments and simulation of the results, we quantitatively determine the spatial coherence lengths of several OLEDs and find them to be a few micrometers. A 60% increase in the spatial coherence length was observed when using a narrow bandwidth emitter and a metal-coated grating.

KW - OLED

KW - Double-slit experiment

KW - Spatial coherence length

KW - Diffractive optical element

U2 - 10.1002/lpor.201500065

DO - 10.1002/lpor.201500065

M3 - Article

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VL - 10

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EP - 90

JO - Laser & Photonics Reviews

JF - Laser & Photonics Reviews

IS - 1

ER -

Measuring and structuring the spatial coherence length of organic light-emitting diodes

Abstract

Keywords

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Projects

Ultra-parallel visable light communicati: UK Visible Light Communications

Challening the Limits of Photonics: stru: Challenging the Limits of Photonics: Structured Light

Datasets

Data underpinning - Measuring and structuring the spatial coherence length of organic light-emitting diodes

Cite this