Electrical tuning of an optical antenna
(Conference Presentation)

Mark L. Brongersma

doi:10.1117/12.2239491

9 November 2016 Electrical tuning of an optical antenna (Conference Presentation)

Mark L. Brongersma

Proceedings Volume 9921, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIV; 992103 (2016) https://doi.org/10.1117/12.2239491
Event: SPIE Nanoscience + Engineering, 2016, San Diego, California, United States

Abstract

The scaling of active photonic devices to deep-submicron length-scales has been hampered by the fundamental law of diffraction and the absence of materials with sufficiently strong electrooptic effects. Here, we demonstrate a solid state electro-optical switching mechanism that can operate in the visible spectral range with an active volume that is comparable to the size of the smallest active electronic components. The switching mechanism relies on electrochemically displacing atoms inside the nanometer-scale gap between two crossed metallic wires forming a crosspoint junction. Such junctions afford extreme light concentration and display singular optical behavior upon formation of a conductive channel. We illustrate how this effect can be used to actively tune the resonances of a plasmonic antenna. The tuning mechanism is analyzed using a combination of electrical and optical measurements as well as electron energy loss (EELS) in a scanning transmission electron microscope (STEM).

Conference Presentation

Citation Download Citation

Mark L. Brongersma "Electrical tuning of an optical antenna (Conference Presentation)", Proc. SPIE 9921, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIV, 992103 (9 November 2016); https://doi.org/10.1117/12.2239491

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KEYWORDS

Electro optics

Optical antennas

Switching

Plasmonics

Chemical species

Diffraction

Electronic components

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