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Millivolt Modulation of Plasmonic Metasurface Optical Response via Ionic Conductance

Thyagarajan, Krishnan and Sokhoyan, Ruzan and Zornberg, Leonardo Z. and Atwater, Harry A. (2017) Millivolt Modulation of Plasmonic Metasurface Optical Response via Ionic Conductance. Advanced Materials, 29 (31). Art. No. 1701044. ISSN 0935-9648. doi:10.1002/adma.201701044.

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A plasmonic metasurface with an electrically tunable optical response that operates at strikingly low modulation voltages is experimentally demonstrated. The fabricated metasurface shows up to 30% relative change in reflectance in the visible spectral range upon application of 5 mV and 78% absolute change in reflectance upon application of 100 mV of bias. The designed metasurface consists of nanostructured silver and indium tin oxide (ITO) electrodes which are separated by 5 nm thick alumina. The millivolt-scale optical modulation is attributed to a new modulation mechanism, in which transport of silver ions through alumina dielectric leads to bias-induced nucleation and growth of silver nanoparticles in the ITO counter-electrode, altering the optical extinction response. This transport mechanism, which occurs at applied electric fields of 1 mV nm^(−1), provides a new approach to use of ionic transport for electrical control over light–matter interactions.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Sokhoyan, Ruzan0000-0003-4599-6350
Atwater, Harry A.0000-0001-9435-0201
Alternate Title:Millivolt modulation of plasmonic metasurface via ionic conductance
Additional Information:© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. Version of record online: 14 June 2017; Manuscript Revised: 28 April 2017; Manuscript Received: 21 February 2017. This work was supported by the Swiss National Science Foundation (Grant No. 151853), Hybrid Nanophotonics Multidisciplinary University Research Initiative Grant (Air Force Office of Scientific Research, FA9550-12-1-0024), and the Samsung Electronics Metaphotonics Cluster. The conducting oxide material synthesis design and characterization was supported by the U.S. Department of Energy (DOE), Office of Science Grant (DE-FG02-07ER46405). Used facilities were supported by the Kavli Nanoscience Institute (KNI) and Joint Center for Artificial Photosynthesis (JCAP) at Caltech. The authors would like to thank Artur R. Davoyan, Matthew Sullivan Hunt, and Barry Baker for useful discussions; Carol Garland for help with the TEM imaging; and Jonathan Grandidier for his help with the transfer matrix code. The authors declare no conflict of interest.
Group:JCAP, Kavli Nanoscience Institute
Funding AgencyGrant Number
Swiss National Science Foundation (SNSF)151853
Air Force Office of Scientific Research (AFOSR)FA9550-12-1-0024
Samsung ElectronicsUNSPECIFIED
Department of Energy (DOE)DE-FG02-07ER46405
Subject Keywords:filament formation; indium tin oxide (ITO); ionic transport; memristors; tunable metasurfaces
Issue or Number:31
Record Number:CaltechAUTHORS:20161121-085049515
Persistent URL:
Official Citation:K. Thyagarajan, R. Sokhoyan, L. Zornberg, H. A. Atwater, Adv. Mater. 2017, 29, 1701044.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72189
Deposited By: Tony Diaz
Deposited On:21 Nov 2016 19:24
Last Modified:11 Nov 2021 04:57

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