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

Micromachines

ChungVu Hoang¹  Toshihide Nabatame²  Akihiko Ohi²  Tadaaki Nagao²  Masakazu Aono²  ThangDuy Dao²  Natsuki Nishio³  Naoki Yamamoto³ 

[1] Institute of Materials Science (IMS), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet street, Hanoi 100000, Vietnam;International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Japan;Physics Department, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan;

关键词: aluminum;    plasmonics;    dark-field scattering;    SERS;    bow-tie antenna;   

DOI  :  10.3390/mi10070468

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown