Preservation of plasmonic interactions in DLC protected robust organic-plasmonic hybrid systems

Pawel Piotr Cielecki, Elżbieta Karolina Sobolewska, Oksana Kostiučenko, Till Leißner, Tomas Tamulevicius, Sigitas Tamulevicius, Horst-Günter Rubahn, Jost Adam, Jacek Fiutowski

Research output: Contribution to conference without publisher/journalPosterResearchpeer-review

Abstract

Gold is the most commonly used plasmonic material, however soft and prone to mechanical deformations. It has been previously shown that the durability of gold plasmonic substrates can be improved by applying a protective diamond-like carbon (DLC) coating [1]. In this work, we investigate the influence of such protective layers on plasmonic interactions in organic-plasmonic hybrid systems. We consider systems, consisting of 1-Cyano-quaterphenylene nanofibers on top of gold nano-square plasmonic arrays [2], coated with protective layers of varying thickness. We investigate the spectral position of surface plasmon polariton resonances as well as electric field intensity, as a function of protective layer thickness, using the finite-difference time-domain method. To confirm the numerically indicated field enhancement preservation on top of protective layers, we experimentally map the second harmonic response of organic nanofibers. Subsequently, we experimentally characterize the plasmonic coupling between organic nanofibers and underlying substrates by time-resolved photoluminescence spectroscopy. Our findings reveal that the optimal thickness for DLC coating, in terms of mechanical protection while preserving plasmonic interactions, is in the range of 25 to 55 nm. This is of a great interest for the fabrication of new plasmonic components with increased durability.
Original languageEnglish
Publication date15. Jun 2017
Publication statusPublished - 15. Jun 2017
EventInternational Conference on Nanotechnology and Innovation in the Baltic Sea Region 2017 - Kaunas, Lithuania
Duration: 14. Jun 201716. Jun 2017
http://ktu.edu/en/nibs-conference

Conference

ConferenceInternational Conference on Nanotechnology and Innovation in the Baltic Sea Region 2017
CountryLithuania
CityKaunas
Period14/06/201716/06/2017
Internet address

Keywords

  • Organic Plasmonic Hybrids
  • Diamond-like Carbon protective layer
  • Second harmonic mapping
  • Time resolved photoluminescence
  • Finite difference time domain

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