Polarization-dependent ultrafast plasmon relaxation dynamics in nanoporous gold thin films and nanowires

Domantas Peckus, Adrien Chauvin, Tomas Tamulevičius, Mindaugas Juodėnas, Junjun Ding, Chang-Hwan Choi, Abdel Aziz El Mel, Pierre Yves Tessier, Sigitas Tamulevičius

Research output: Contribution to journalArticle

Abstract

Metal materials structured at nanoscale are extensively used in a variety of applications, including molecular sensing, nanoscale heaters for photothermal therapy, etc. These applications depend on the strong absorption and electric field enhancements associated with localized surface plasmon resonance (LSPR). Despite multiple investigations of LSPR relaxation dynamics in plasmonic metallic nanoparticles (i.e. nanospheres, nanocubes, etc), no detailed studies of porous thin films or nanowires have been reported so far. In this paper, LSPR relaxation dynamics of nanoporous gold thin film, gold nanowires, and nanoporous gold nanowires (structures with the potential for a vast range of sensing and optical applications) were studied by means of transient absorption spectroscopy (TAS). Au and Au/Cu thin films produced by magnetron sputtering deposition over a nanograted silicon substrate enabled the creation of highly organized nanowire arrays of centimetres length. Nanoporous structures were created by the dealloying of Au/Cu alloy. We found that formation of such a subwavelength period grating structure in gold increases the efficiency of hot electron relaxation compared to continuous film, while the porosity of gold nanostructures has the opposite effect. The results also expressed a clear dependence of the TAS signal on the polarization (i.e. orientation of the electric field with respect to the nanoporous gold nanowires) of the pump and probe pulses, compared to non-porous gold nanowires.

Original languageEnglish (US)
Article number225103
JournalJournal of Physics D: Applied Physics
Volume52
Issue number22
DOIs
StatePublished - Mar 22 2019

Fingerprint

nanowires
gold
polarization
thin films
surface plasmon resonance
absorption spectroscopy
electric fields
hot electrons
heaters
therapy
magnetron sputtering
gratings
pumps
porosity
nanoparticles
augmentation
probes
silicon
pulses
metals

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Acoustics and Ultrasonics

Cite this

Peckus, Domantas ; Chauvin, Adrien ; Tamulevičius, Tomas ; Juodėnas, Mindaugas ; Ding, Junjun ; Choi, Chang-Hwan ; El Mel, Abdel Aziz ; Tessier, Pierre Yves ; Tamulevičius, Sigitas. / Polarization-dependent ultrafast plasmon relaxation dynamics in nanoporous gold thin films and nanowires. In: Journal of Physics D: Applied Physics. 2019 ; Vol. 52, No. 22.
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Peckus, D, Chauvin, A, Tamulevičius, T, Juodėnas, M, Ding, J, Choi, C-H, El Mel, AA, Tessier, PY & Tamulevičius, S 2019, 'Polarization-dependent ultrafast plasmon relaxation dynamics in nanoporous gold thin films and nanowires', Journal of Physics D: Applied Physics, vol. 52, no. 22, 225103. https://doi.org/10.1088/1361-6463/ab0719

Polarization-dependent ultrafast plasmon relaxation dynamics in nanoporous gold thin films and nanowires. / Peckus, Domantas; Chauvin, Adrien; Tamulevičius, Tomas; Juodėnas, Mindaugas; Ding, Junjun; Choi, Chang-Hwan; El Mel, Abdel Aziz; Tessier, Pierre Yves; Tamulevičius, Sigitas.

In: Journal of Physics D: Applied Physics, Vol. 52, No. 22, 225103, 22.03.2019.

Research output: Contribution to journalArticle

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AU - Peckus, Domantas

AU - Chauvin, Adrien

AU - Tamulevičius, Tomas

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AU - Ding, Junjun

AU - Choi, Chang-Hwan

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AU - Tessier, Pierre Yves

AU - Tamulevičius, Sigitas

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