Dao Thang Duy, Hoang Chung Vu, Nishio Natsuki, Yamamoto Naoki, Ohi Akihiko, Nabatame Toshihide, Aono Masakazu, Nagao Tadaaki
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.
Micromachines (Basel). 2019 Jul 13;10(7):468. doi: 10.3390/mi10070468.
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.
在寻找超越贵金属的实用等离子体材料的过程中，铝已成为一个有利的候选材料，因为它储量丰富，并且有可能定制从紫外到红外范围的等离子体共振。在这封信中，结合数值电磁模拟，我们通过表面增强拉曼光谱实验研究了独立式铝蝴蝶结天线阵列等离子体共振的暗场散射光谱映射，并将其强烈的近场增强与传感能力相关联。等离子体映射和拉曼映射的空间匹配为实现独立式铝蝴蝶结天线在等离子体传感方面非常有前景的应用又迈进了一步。
