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Open AccessArticle

Dark-Field Scattering and Local SERS Mapping from Plasmonic Aluminum Bowtie Antenna Array

1
International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Japan
2
Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
3
Institute of Materials Science (IMS), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet street, Hanoi 100000, Vietnam
4
Institute of Theoretical and Applied Research (ITAR), Duy Tan University, 1 Phung Chi Kien Street, Hanoi 100000, Vietnam
5
Physics Department, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan
6
Department of Condensed Matter Physics, Graduate School of Science, Hokkaido University, Kita-10 Nishi-8 Kita-ku, Sapporo 060-0810, Japan
*
Authors to whom correspondence should be addressed.
Micromachines 2019, 10(7), 468; https://doi.org/10.3390/mi10070468
Received: 22 April 2019 / Revised: 7 July 2019 / Accepted: 11 July 2019 / Published: 13 July 2019
(This article belongs to the Special Issue Infrared Nanophotonics: Materials, Devices, and Applications)
On the search for the practical plasmonic materials beyond noble metals, aluminum has been emerging as a favorable candidate as it is abundant and offers the possibility of tailoring the plasmonic resonance spanning from ultra-violet to the infrared range. In this letter, in combination with the numerical electromagnetic simulations, we experimentally study the dark-field scattering spectral mapping of plasmonic resonance from the free-standing Al bowtie antenna arrays and correlate their strong nearfield enhancement with the sensing capability by means of surface-enhanced Raman spectroscopy. The spatial matching of plasmonic and Raman mapping puts another step to realize a very promising application of free-standing Al bowtie antennas for plasmonic sensing. View Full-Text
Keywords: aluminum; plasmonics; dark-field scattering; SERS; bow-tie antenna aluminum; plasmonics; dark-field scattering; SERS; bow-tie antenna
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MDPI and ACS Style

Dao, T.D.; Hoang, C.V.; Nishio, N.; Yamamoto, N.; Ohi, A.; Nabatame, T.; Aono, M.; Nagao, T. Dark-Field Scattering and Local SERS Mapping from Plasmonic Aluminum Bowtie Antenna Array. Micromachines 2019, 10, 468.

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