文章基本信息

标题：Localizing nanoscale objects using nanophotonic near-field transducers
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作者：Tom A. W. Wolterink ; Robin D. Buijs ; Giampiero Gerini 等
期刊名称：Nanophotonics
印刷版ISSN：2192-8606
电子版ISSN：2192-8614
出版年度：2021
页码：1723–1732
DOI：10.1515/nanoph-2020-0669
出版社：Walter de Gruyter GmbH
摘要：Abstract 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.
关键词：metasurface; nanophotonics; nanoscale sensing; nanostructures; near-field optics; plasmonics.