Achromatic super-oscillatory lenses with sub-wavelength focusing

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, initi...

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Main Authors: Yuan, Guang Hui, Rogers, Edward T. F., Zheludev, Nikolay I.
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2017
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Online Access:https://hdl.handle.net/10356/82939
http://hdl.handle.net/10220/42420
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-829392023-02-28T19:31:10Z Achromatic super-oscillatory lenses with sub-wavelength focusing Yuan, Guang Hui Rogers, Edward T. F. Zheludev, Nikolay I. School of Physical and Mathematical Sciences Super-oscillation Achromatic 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. Published version 2017-05-15T06:54:17Z 2019-12-06T15:08:41Z 2017-05-15T06:54:17Z 2019-12-06T15:08:41Z 2017 2017 Journal Article Yuan, G. H., Rogers, E. T. F., & Zheludev, N. I. (2017). Achromatic super-oscillatory lenses with sub-wavelength focusing. Light: Science & Applications, 6, e17036-. 2047-7538 https://hdl.handle.net/10356/82939 http://hdl.handle.net/10220/42420 10.1038/lsa.2017.36 199436 en Light: Science & Applications © 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 http://creativecommons.org/licenses/by/4.0/ 8 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Super-oscillation
Achromatic
spellingShingle Super-oscillation
Achromatic
Yuan, Guang Hui
Rogers, Edward T. F.
Zheludev, Nikolay I.
Achromatic super-oscillatory lenses with sub-wavelength focusing
description 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.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Yuan, Guang Hui
Rogers, Edward T. F.
Zheludev, Nikolay I.
format Article
author Yuan, Guang Hui
Rogers, Edward T. F.
Zheludev, Nikolay I.
author_sort Yuan, Guang Hui
title Achromatic super-oscillatory lenses with sub-wavelength focusing
title_short Achromatic super-oscillatory lenses with sub-wavelength focusing
title_full Achromatic super-oscillatory lenses with sub-wavelength focusing
title_fullStr Achromatic super-oscillatory lenses with sub-wavelength focusing
title_full_unstemmed Achromatic super-oscillatory lenses with sub-wavelength focusing
title_sort achromatic super-oscillatory lenses with sub-wavelength focusing
publishDate 2017
url https://hdl.handle.net/10356/82939
http://hdl.handle.net/10220/42420
_version_ 1759858240011632640