Focusing of light by a nanohole array

By F. Huang, Yifang Chen, F. J. García de Abajo, Nikolay I. Zheludev. 2006

200 citations recorded by the source corpus.

We demonstrate a conceptually new mechanism for focusing at optical frequencies based upon the use of nano-hole quasi-periodic arrays in metal screens. Using coherent illumination at 660nm and scanning near-field optical microscopy, ~ 290nm "hot spots", were observed at a distance of ~ 12:5µm from the array. Even smaller hot-spots of about 200nm in waist were observed closer to the plane of the array.

Subfields: Biomedical Engineering, Surfaces, Coatings and Films

View Paper: https://www.semanticscholar.org/paper/bb4a8d9df1d3ea7d271d1a35686e0a592c56e540

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In Biomedical Engineering

In Surfaces, Coatings and Films

Citations in the corpus

Roadmap on superoscillations (2019, background): “Almost concurrently, this phenomenon was observed experimentally at the University of Southampton when patterns of subwavlength hotspots in free space were discovered by scanning a sub-wavelength aperture over a quasi-crystal array of nanoholes illuminated with coherent light [29, 30], and shortly a”
Colloquium: Light scattering by particle and hole arrays (2007, background): “ in quasi-crystal arrays (Schwanecke et al., 2006), as well as the rich Talbot-like structure and subwavelength light localization observed at distances up to several wavelengths away from the array (Huang et al., 2007). 2. Single holes in thick lms Our use of Babinet’s principle in the previous sec”