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나노물질 및 화학반응 연구단
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Amplification of hot electron flow by the surface plasmon effect on metal-insulator-metal nanodiodes

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Title
Amplification of hot electron flow by the surface plasmon effect on metal-insulator-metal nanodiodes
Author(s)
Changhwan Lee; Ievgen I Nedrygailov; Young Keun Lee; Ahn, C.; Hyosun Lee; Jeon, S.; Jeong Young Park
Publication Date
2015-11
Journal
NANOTECHNOLOGY, v.26, no.44, pp.445201 -
Publisher
IOP PUBLISHING LTD
Abstract
Au-TiO2-Ti nanodiodes with a metal-insulator-metal structure were used to probe hot electron flows generated upon photon absorption. Hot electrons, generated when light is absorbed in the Au electrode of the nanodiode, can travel across the TiO2, leading to a photocurrent. Here, we demonstrate amplification of the hot electron flow by (1) localized surface plasmon resonance on plasmonic nanostructures fabricated by annealing the Au-TiO2-Ti nanodiodes, and (2) reducing the thickness of the TiO2. We show a correlation between changes in the morphology of the Au electrodes caused by annealing and amplification of the photocurrent. Based on the exponential dependence of the photocurrent on TiO2 thickness, the transport mechanism for the hot electrons across the nanodiodes is proposed. © 2015 IOP Publishing Ltd
URI
https://pr.ibs.re.kr/handle/8788114/2238
ISSN
0957-4484
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
Files in This Item:
Nanotechnology 26, 440201 (2015).pdfDownload

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