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Planar Plasmonic Devices for Controlling Polarization of Light
KTH, School of Information and Communication Technology (ICT).
2013 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Planar nanostructures made of noble metal can efficiently control transmission of light, thanks to surface plasmon polaritons (SPPs) mediated through interaction between such a structure and incoming light. In this thesis, we numerically characterize, with a 3D finiteelement method, three types of plasmonic devices: plasmonic radial/azimuthal filter, plasmonic quarter-wave plate made of a periodic array of round holes in a thin metallic film, and a plasmonic quarter-wave plate with a periodic array of cross-shaped apertures.

The plasmonic polarization filter is formed by a series of concentric equidistant gold rings, and it can transmit the radially polarized light and block the azimuthally polarized light. The quarter-wave plate with round holes has a different lattice constant along two Cartesiancoordinate directions that enable different phase retardations for two orthogonally polarized incident waves; hence, it can convert a linearly polarized light to a circularly polarized light. For the quarter-wave plate with an array of cross-shaped apertures, it utilizes the different lengths of horizontal/vertical arms to manipulate the phase retardations. All of these devices have sub-micron thicknesses, unlike their traditional counterparts that are bulky and inconvenient for integration purposes. Fabrication of the wave plate with cross-shaped apertures was attempted in collaboration with members in the Optics and Photonics unit at KTH.

Place, publisher, year, edition, pages
2013. , 39 p.
Series
TRITA-ICT-EX, 2013:96
National Category
Computer and Information Science
Identifiers
URN: urn:nbn:se:kth:diva-177841OAI: oai:DiVA.org:kth-177841DiVA: diva2:874504
Examiners
Available from: 2015-12-01 Created: 2015-11-27 Last updated: 2015-12-01Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
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Language
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  • en-GB
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Output format
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