Nanoplasmonic structures: Designing electromagnetic fields PowerPoint Presentation, PPT - DocSlides

Nanoplasmonic structures: Designing electromagnetic fields

Benji Börner

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Content

short revision

Surface Plasmon Polariton (SPP) mathematicalSPP excitation by electonsSPP excitation by photonsnanoplasmonic structuresexperimental applications

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surface plasmons on metal surfacecoherent oscillation of free electronscan be excited by electrons and photons

Revision

www.ucd.ie

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boundary condition by Maxwell for em wave

mathematical explanation – dispersion relation

mysite.du.edu

/~lconyers/SERDP/Figure5.htm

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mathematical explanation – dispersion relation

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mathematical explanation – dispersion relation

real part

imaginary part

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damping due to ohmic losses and electron-core interactionsmanifestation in imaginary part of dielectric function

mathematical explanation – dispersion relation

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intensity decreased by absorption (E²)propagation length: intensity at distance x: skin depth formula:

mathematical explanation

http://erbium.ece.mcgill.ca/research/plasmonic-interconnects/

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electron scattering on surface

parallel part creates surface plasmon polariton

SPP excitation by electrons

Yang

Zhang et.al. “Edge

scattering of surface

plasmons

excited by scanning tunneling microscopy”, Maier - Plasmonics

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need to match wavelength and momentumtools like prisms or gratings needed

SPP excitation by photons

http://

pjmedia.com/lifestyle/files/2013/07/Dispersion_prism.jpg

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prism in Kretschmann configurationdifferent dielectric functions match momentumevanescent wave excites SPP

SPP excitation by photons - prism

Google.de ->

Kretschmann

configuration

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prism in Otto configurationSPP excited on top of metal film

SPP excitation by

photons - prism

http://skullsinthestars.com/2010/09/21/optics-basics-surface-plasmons

/Minghui Hong et.al „ Maskless multibeam laser irradiation enables large-area nanostructure fabrication“

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excitation with gratingreciprocal grating vector gives imaginary part

SPP excitation by photons - grating

Byoungho

Lee et.al. „Shaping and focusing light beams with plasmonics”

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SPP scatter on defectsdefects provide free space radiation

SPP excitation

http://www.westga.edu/~chem/facultydocs/stuart.htm

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nanoplasmonic

structures – gratings

Yongqi

Fu et. al. “Plasmonic Lenses”

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nanoplasmonic

structures – flat gratings

http://www.cs.huji.ac.il/~ulevy/facil.php

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nanoplasmonic

structures – concave gratings

Byoungho

Lee et.al. „Shaping and focusing light beams with plasmonics“

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nanoplasmonic

structures – concentric gratings

Yongqi

Fu et. al. “

Plasmonic

Lenses”

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nanoplasmonic

structures – nanoholes

Carsten

Sönnichsen

“Plasmons in metal nanostructures”Maier - Plasmonics

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investigation of surfaces to find defectsidentify density changesmolecular detectors

experimental applications

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Thank you!

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