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Open AccessArticle

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

International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Japan
Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
Institute of Materials Science (IMS), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet street, Hanoi 100000, Vietnam
Institute of Theoretical and Applied Research (ITAR), Duy Tan University, 1 Phung Chi Kien Street, Hanoi 100000, Vietnam
Physics Department, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan
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;
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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