Bandwidths limitations of giant optical field enhancements in dielectric multi-layers

Dielectric multilayers, when properly optimized, have been shown to sustain giant optical field enhancement directly linked to the imaginary index of the materials. Such giant optical field is of great interests to increase tremendously the sensitivity of optoelectronic systems. Unfortunately, this...

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Bibliographic Details
Published inOptics express Vol. 25; no. 13; pp. 14883 - 14891
Main Authors Zerrad, M, Lereu, A L, N'diaye, C, Lemarchand, F, Amra, C
Format Journal Article
LanguageEnglish
Published United States Optical Society of America - OSA Publishing 26.06.2017
Subjects
Electromagnetism
Engineering Sciences
Optics
Photonic
Physics
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Summary:Dielectric multilayers, when properly optimized, have been shown to sustain giant optical field enhancement directly linked to the imaginary index of the materials. Such giant optical field is of great interests to increase tremendously the sensitivity of optoelectronic systems. Unfortunately, this ultra-sensitive system is also highly depending on the illumination conditions. We discuss here the effect of the angular divergence and the spectral bandwidth of the incident laser beam on the absorption and field enhancement. In this study, we clearly show that giant optical field enhancements, up to several decades, may be achievable when the incident conditions are down few μrad and pm in term of angular and spectral bandwidths respectively.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.25.014883