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Title: Achromatic super-oscillatory lenses with sub-wavelength focusing
Authors: Yuan, Guang Hui
Rogers, Edward T. F.
Zheludev, Nikolay I.
Keywords: Super-oscillation
Issue Date: 2017
Source: Yuan, G. H., Rogers, E. T. F., & Zheludev, N. I. (2017). Achromatic super-oscillatory lenses with sub-wavelength focusing. Light: Science & Applications, 6, e17036-.
Series/Report no.: Light: Science & Applications
Abstract: Lenses are crucial to light-enabled technologies. Conventional lenses have been perfected to achieve near-diffraction-limited resolution and minimal chromatic aberrations. However, such lenses are bulky and cannot focus light into a hotspot smaller than half wavelength of light. Pupil filters, initially suggested by Toraldo di Francia, can overcome the resolution constraints of conventional lenses, but are not intrinsically chromatically corrected. Here we report single-element planar lenses that not only deliver sub-wavelength focusing – beating the diffraction limit of conventional refractive lenses – but also focus light of different colors into the same hotspot. Using the principle of super-oscillations we designed and fabricated a range of binary dielectric and metallic lenses for visible and infrared parts of the spectrum that are manufactured on silicon wafers, silica substrates and optical fiber tips. Such low cost, compact lenses could be useful in mobile devices, data storage, surveillance, robotics, space applications, imaging, manufacturing with light, and spatially resolved nonlinear microscopies.
ISSN: 2047-7538
DOI: 10.1038/lsa.2017.36
Schools: School of Physical and Mathematical Sciences 
Rights: © 2017 The Author(s). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line;if the materialis not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce thematerial. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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