Active Plasmonic Devices with Anisotropic Optical Response: A Step Toward Active Polarizer

• Type: Article in International Scientific Journal
• Date: 2009-04-10

Authors

Verena Stockhausen (Author) FEUP; Jean Christophe Lacroix (Author) Other; Yann Leroux (Author) Other; Claire Fave (Author) Other; Nordin Félidj (Author) Other; Johan Grand (Author) Other; Andreas Hohenau (Author) Other; Joachim R. Krenn (Author) Other

Journal

Title: Nano Letters

Vol. 9 No. 5

Pages: 2144-2148

ISSN: 1530-6984

Publisher: American Chemical Society

Indexing

ISI Web of Science

Scopus

Other information

DOI: 10.1021/nl900695j

Abstract (EN): Control of the optical properties of metallic nanoparticles (NP) is realized using an electrochemical switch consisting of a thin layer of conducting polymer (CP). It is shown that the quenching of localized surface plasmon (LSP) sustained by oblate particles depends of the frequency of the LSP resonance. This effect is attributed to the variation of the CP dielectric function with wavelength. As a consequence, prolate arrays show total quenching of the LSP resonance along the major axis of the particles whereas modulation and moderate damping are observed along the minor axis. Combining electroactive conducting polymer and prolate NP makes it possible to design active plasmonic devices with anisotropic optical response upon CP switching. In the present case, such devices can be used as active filters or polarizers.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5