2013 Fiscal Year Final Research Report

Strain sensor using LSPR of Au nano disk-pairs

Research Project

Project/Area Number	23710156
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Multi-year Fund
Research Field	Microdevices/Nanodevices
Research Institution	The University of Tokyo
Principal Investigator	KAN Tetsuo 東京大学, 情報理工学(系)研究科, 助教 (30504815)
Project Period (FY)	2011 – 2012
Keywords	LSPR / ナノ粒子 / 偏光 / 歪センサ / ワイヤレス
Research Abstract	We propose a strain sensor utilizing light scattered by a pair of nano-disks onto an elastomer sheet. It is known that a scattering spectrum of a nano-disk pair exhibit a dependency on the gap between the disks by local surface plasmon resonance. We formed nano-disk pairs with a diameter of 100 nm and a gap of 20 nm on an elastomer sheet. Spectrum measurements were performed when the elastomer sheet was being pulled. It was found that the shape of the scattering spectrum altered depending on the gap distance between the disks of the pair. It was confirmed that the strain can be measured by an optical way, offering wireless measurements of in situ strain. Because this sensor can be miniaturized to be sub-micron size,invasion to the embedding media can be decreased during the strain measurement.