Localizing nanoscale objects using nanophotonic near-field transducers

Nanophotonics

article

Tom A. W. Wolterink¹  Robin D. Buijs¹  Giampiero Gerini²  A. Femius Koenderink¹  Ewold Verhagen¹ 

[1] Center for Nanophotonics, Science Park 104;Optics Department, Netherlands Organisation for Applied Scientific Research (TNO);Electromagnetics Group, Eindhoven University of Technology (TU/e)

关键词: metasurface;    nanophotonics;    nanoscale sensing;    nanostructures;    near-field optics;    plasmonics;   

DOI  :  10.1515/nanoph-2020-0669

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

We study how nanophotonic structures can be used for determining the position of a nearby nanoscale object with subwavelength accuracy. Through perturbing the near-field environment of a metasurface transducer consisting of nano-apertures in a metallic film, the location of the nanoscale object is transduced into the transducer’s far-field optical response. By monitoring the scattering pattern of the nanophotonic near-field transducer and comparing it to measured reference data, we demonstrate the two-dimensional localization of the object accurate to 24 nm across an area of 2 × 2 μm. We find that adding complexity to the nanophotonic transducer allows localization over a larger area while maintaining resolution, as it enables encoding more information on the position of the object in the transducer’s far-field response.

【 授权许可】

CC BY