Plasmonic critical angle in optical transmission through subwavelength metallic gratings

Plasmonic critical angle in optical transmission through subwavelength metallic gratings

We observe and theoretically analyze the plasmonic analog of the critical angle phenomenon in optical transmission through subwavelength gratings milled in an optically thick metal film. The total transmission from a denser medium to a less dense one vanishes while the total reflection holds very st...

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Veröffentlicht in:Optics letters 2011-12, Vol.36 (23), p.4584-4586
Hauptverfasser: Wang, Zhonghua, Li, Guangyuan, Xiao, Feng, Lu, Fan, Li, Kun, Xu, Anshi
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Sprache:eng
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Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Gratings
Optical elements, devices, and systems
Optics
Physics
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container_end_page 4586
container_issue 23
container_start_page 4584
container_title Optics letters
container_volume 36
creator Wang, Zhonghua
Li, Guangyuan
Xiao, Feng
Lu, Fan
Li, Kun
Xu, Anshi
description We observe and theoretically analyze the plasmonic analog of the critical angle phenomenon in optical transmission through subwavelength gratings milled in an optically thick metal film. The total transmission from a denser medium to a less dense one vanishes while the total reflection holds very strong, providing the incidence angle increases past the plasmonic critical angle (PCA). The conditions and physical origins of the total internal reflection above the PCA are clarified.
doi_str_mv 10.1364/ol.36.004584
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subjects Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Gratings
Optical elements, devices, and systems
Optics
Physics
title Plasmonic critical angle in optical transmission through subwavelength metallic gratings
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