Plasmon-induced nanoscale quantised conductance filaments

Vasyl G. Kravets, Owen P. Marshall, Fred Schedin, Francisco J. Rodriguez, Alexander A. Zhukov, Ali Gholinia, Eric Prestat, Sarah J. Haigh, Alexander N. Grigorenko

    Research output: Contribution to journalArticlepeer-review


    Plasmon-induced phenomena have recently attracted considerable attention. At the same time, relatively little research has been conducted on electrochemistry mediated by plasmon excitations. Here we report plasmon-induced formation of nanoscale quantized conductance filaments within metal-insulator-metal heterostructures. Plasmon-enhanced electromagnetic fields in an array of gold nanodots provide a straightforward means of forming conductive CrOx bridges across a thin native chromium oxide barrier between the nanodots and an underlying metallic Cr layer. The existence of these nanoscale conducting filaments is verified by transmission electron microscopy and contact resistance measurements. Their conductance was interrogated optically, revealing quantised relative transmission of light through the heterostructures across a wavelength range of 1-12 μm. Such plasmon-induced electrochemical processes open up new possibilities for the development of scalable devices governed by light.

    Original languageEnglish
    Article number2878
    JournalScientific Reports
    Issue number1
    Early online date6 Jun 2017
    Publication statusPublished - 2017

    Research Beacons, Institutes and Platforms

    • National Graphene Institute


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