Core-Shell Plasmonic Nanohelices

Title

Core-Shell Plasmonic Nanohelices

 Author

Kosters, N.D. (TU Delft QN/Kuipers Lab; Center for Nanophotonics; Kavli institute of nanoscience Delft)
De Hoogh, Anouk (AMOLF)
Zeijlemaker, Hans (Center for Nanophotonics)
Acar, Hakkl (Center for Nanophotonics)
Rotenberg, Nir (Max Planck Institute for the Science of Light)
Kuipers, L. (TU Delft QN/Quantum Nanoscience; AMOLF; Kavli institute of nanoscience Delft)

Department

QN/Quantum Nanoscience

 Date

2017-07-19

 Abstract

We introduce core-shell plasmonic nanohelices, highly tunable structures that have a different response in the visible for circularly polarized light of opposite handedness. The glass core of the helices is fabricated using electron beam induced deposition and the pure gold shell is subsequently sputter coated. Optical measurements allow us to explore the chiral nature of the nanohelices, where differences in the response to circularly polarized light of opposite handedness result in a dissymmetry factor of 0.86, more than twice of what has been previously reported. Both experiments and subsequent numerical simulations demonstrate the extreme tunability of the core-shell structures, where nanometer changes to the geometry can lead to drastic changes of the optical responses. This tunability, combined with the large differential transmission, make core-shell plasmonic nanohelices a powerful nanophotonic tool for, for example, (bio)sensing applications.


 Subject

chirality
core-shell
electron beam induced deposition
nanohelices
plasmonics

 To reference this document use:

http://resolver.tudelft.nl/uuid:bf7f6f36-9e82-4106-8b4b-872e3f853ac5

 DOI

https://doi.org/10.1021/acsphotonics.7b00496

 ISSN

2330-4022

 Source

ACS Photonics, 4 (7), 1858-1863

 Part of collection

Institutional Repository

 Document type

journal article

 Rights

© 2017 N.D. Kosters, Anouk De Hoogh, Hans Zeijlemaker, Hakkl Acar, Nir Rotenberg, L. Kuipers
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