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Open AccessArticle

Multi-Purpose Nanovoid Array Plasmonic Sensor Produced by Direct Laser Patterning

1
Far Eastern Federal University, Vladivostok 690041, Russia
2
Institute of Automation and Control Processes, Far Eastern Branch, Russian Academy of Sciences, Vladivostok 690091, Russia
3
Graduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
4
Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
5
Research Institute of Science and Technology, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
6
Swinburne University of Technology, Hawthorn 3122 VIC, Australia
7
Melbourne Centre for Nanofabrication, ANFF, Clayton 3168 VIC, Australia
8
Lebedev Physical Institute, Russian Academy of Sciences, Moscow 119991, Russia
9
National Research Nuclear University MEPhI, Moscow 115409, Russia
*
Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(10), 1348; https://doi.org/10.3390/nano9101348
Received: 9 August 2019 / Revised: 14 September 2019 / Accepted: 17 September 2019 / Published: 20 September 2019
(This article belongs to the Special Issue Laser Printing of Nanophotonic Structures)
We demonstrate a multi-purpose plasmonic sensor based on a nanovoid array fabricated via inexpensive and highly-reproducible direct femtosecond laser patterning of thin glass-supported Au films. The proposed nanovoid array exhibits near-IR surface plasmon (SP) resonances, which can be excited under normal incidence and optimised for specific applications by tailoring the array periodicity, as well as the nanovoid geometric shape. The fabricated SP sensor offers competitive sensitivity of ≈ 1600 nm/RIU at a figure of merit of 12 in bulk refractive index tests, as well as allows for identification of gases and ultra-thin analyte layers, making the sensor particularly useful for common bioassay experiments. Moreover, isolated nanovoids support strong electromagnetic field enhancement at lattice SP resonance wavelength, allowing for label-free molecular identification via surface-enhanced vibration spectroscopy. View Full-Text
Keywords: direct femtosecond laser printing; nanovoid arrays; plasmonic sensors; refractive index and gas sensing direct femtosecond laser printing; nanovoid arrays; plasmonic sensors; refractive index and gas sensing
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Pavlov, D.V.; Zhizhchenko, A.Y.; Honda, M.; Yamanaka, M.; Vitrik, O.B.; Kulinich, S.A.; Juodkazis, S.; Kudryashov, S.I.; Kuchmizhak, A.A. Multi-Purpose Nanovoid Array Plasmonic Sensor Produced by Direct Laser Patterning. Nanomaterials 2019, 9, 1348.

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