Creating and moving nanoantenna cold spots anywhere  

作　　者：Alex J.Vernon Francisco J.Rodriguez-Fortuno 

机构地区：[1]Department of Physics,King's College London,Strand,London WC2R 2LS,United Kingdom

出　　处：《Light(Science & Applications)》2022年第10期2335-2344,共10页光（科学与应用)（英文版）

基　　金：This work was supportedby European ResearchCouncil StartingGrant ERC2016-STG-714151-PSINFONI.

摘　　要：Cold spots are sub-wavelength regions which might emerge near a nanoantenna,should one or more components of some far-field illumination cancel out with scattered light.We show that by changing only the polarisation,amplitude,and phase of two plane waves,a unique,zero-magnitude and highly sub-wavelength cold spot can be created and moved anywhere in the space around a nanoantenna of any arbitrary shape.This can be achieved using ultra-fast modulated pulses,or a time-harmonic approximation.Easily disturbed by a change in the nanoantenna's material or position,a manufactured cold spot is fragile and could be used in nanoscale sensing.Our technique exploits the linearity of Maxwell's equations and could be adapted to manipulate any phenomena governed by the linear wave equation,including acoustic scattering.This is a means for potentially ultra-fast sub-wavelength electric field manipulation.

关 键 词：ILLUMINATION SCATTERED ARBITRARY 

分 类 号：O17[理学—数学]