作者
Jonathan C Karsch, Jason M Bartell, Gregory D Fuchs
发表日期
2017/8/1
期刊
APL Photonics
卷号
2
期号
8
出版商
AIP Publishing
简介
The development of spintronic technology with increasingly dense, high-speed, and complex devices will be accelerated by accessible microscopy techniques capable of probing magnetic phenomena on picosecond time scales and at deeply sub-micron length scales. A recently developed time-resolved magneto-thermal microscope provides a path towards this goal if it is augmented with a picosecond, nanoscale heat source. We theoretically study adiabatic nanofocusing and near-field heat induction using conical gold plasmonic antennas to generate sub-100 nm thermal gradients for time-resolved magneto-thermal imaging. Finite element calculations of antenna-sample interactions reveal focused electromagnetic loss profiles that are either peaked directly under the antenna or are annular, depending on the sample’s conductivity, the antenna’s apex radius, and the tip-sample separation. We find that the …
学术搜索中的文章
JC Karsch, JM Bartell, GD Fuchs - APL Photonics, 2017