Print Email Facebook Twitter Accurate Feeding of Nanoantenna by Singular Optics for Nanoscale Translational and Rotational Displacement Sensing Title Accurate Feeding of Nanoantenna by Singular Optics for Nanoscale Translational and Rotational Displacement Sensing Author Xi, Z. (TU Delft ImPhys/Optics) Wei, L. (TU Delft ImPhys/Optics) Adam, A.J.L. (TU Delft ImPhys/Optics) Urbach, Paul (TU Delft ImPhys/Optics) Du, L (Shenzhen University) Date 2016-09-09 Abstract Identifying subwavelength objects and displacements is of crucial importance in optical nanometrology. We show in this Letter that nanoantennas with subwavelength structures can be excited precisely by incident beams with singularity. This accurate feeding beyond the diffraction limit can lead to dynamic control of the unidirectional scattering in the far field. The combination of the field discontinuity of the incoming singular beam with the rapid phase variation near the antenna leads to remarkable sensitivity of the far-field scattering to the displacement at a scale much smaller than the wavelength. This Letter introduces a far-field deep subwavelength position detection method based on the interaction of singular optics with nanoantennas. To reference this document use: http://resolver.tudelft.nl/uuid:842381a1-eeef-4aae-ac22-fda633ac4a2a DOI https://doi.org/10.1103/PhysRevLett.117.113903 ISSN 0031-9007 Source Physical Review Letters, 117 (11), 1-5 Part of collection Institutional Repository Document type journal article Rights © 2016 Z. Xi, L. Wei, A.J.L. Adam, Paul Urbach, L Du Files PDF PhysRevLett.117.113903.pdf 2.08 MB Close viewer /islandora/object/uuid:842381a1-eeef-4aae-ac22-fda633ac4a2a/datastream/OBJ/view