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Interferometric control of the absorption in optical patch antennas.

ABSTRACT: Optical patch nano-antennas possess unique absorption, field enhancement and concentration capabilities - but their crosssection, as well as their response outside of normal incidence are not well understood. Here we explain the large cross-section by considering that each patch nanoantenna is a cavity excited from both sides. Such a simple physical picture allows to fully understand the influence of the angle of incidence - that odd resonances have a very high absorption cross-section which decreases when the incidence angle increases, while even resonances cannot be excited in normal incidence. A direct application would be to use these structures as an optical nanometric set-square.

SUBMITTER: Lemaitre C

PROVIDER: S-EPMC5462803 | biostudies-other | 2017 Jun

REPOSITORIES: biostudies-other

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Interferometric control of the absorption in optical patch antennas.

Lemaître Caroline C Centeno Emmanuel E Moreau Antoine A

Scientific reports 20170607 1

Optical patch nano-antennas possess unique absorption, field enhancement and concentration capabilities - but their crosssection, as well as their response outside of normal incidence are not well understood. Here we explain the large cross-section by considering that each patch nanoantenna is a cavity excited from both sides. Such a simple physical picture allows to fully understand the influence of the angle of incidence - that odd resonances have a very high absorption cross-section which dec ...[more]

PMID: 28592795

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