期刊
ACS PHOTONICS
卷 5, 期 9, 页码 3628-3633出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.8b00532
关键词
position sensing; angular momentum; nanoparticle; helicity; symmetry breaking
类别
资金
- Australian Research Councils Centre of Excellence for Engineered Quantum Systems (EQuS)
- Australian Research Council Future Fellowship
The emergence of technologies operating at the nanometer scale for applications as varied as nano fabrication and super-resolution microscopy has driven the need for ever more accurate spatial localization. In this context, nanostructures have been used as probes in order to provide a reference to track lateral drifts in the system. Yet nanometer precision remains challenging and usually involves complicated measurement apparatus. In this work we report a simple method based on symmetry considerations to measure the position of a subwavelength nanostructure. For a particular choice of structures, gold nanoparticles, we demonstrate a subnanometer lateral precision of 0.55 nm. The versatility of the method also allows for the use of different structures, offering a promising opportunity for subnanometer positioning accuracy for a wide variety of systems.
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