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Super-resolution imaging beyond the near-field

Super-resolution imaging beyond the near-field
Super-resolution imaging beyond the near-field
We report a new technique for sub-wavelength imaging of complex objects in the far-field using a quasiperiodic nanohole array as an imaging lens. Nanohole arrays in metal screens have exhibited many interesting optical properties, including extraordinary transmission of light through periodic and quasiperiodic nanoholes and optical energy concentration [1,2]. We have demonstrated that a quasiperiodic array of nanoholes in a metal screen can concentrate optical energy into hot spots and form sub-wavelength spots in the far-field of the array [1,2] and can be used to image multiple point sources [3]. Here we extend that demonstration to show that a quasiperiodic nanohole array can be used to image more complex structures, such as an array of slits, in the far-field and with sub-wavelength resolution. Figure 1 (a) shows the imaging arrangement, using a quasiperiodic hole array in the place of a conventional lens. The object structure consists of an array of 10 slits, each 300nm x 1.5µm, with a pitch of 600nm and a wavelength of 660nm. The object is 13.5µm away from the quasiperiodic nanohole array and an image is formed 13.5µm behind the array. Assuming the grating lines are incoherent, as would be the case in a biological experiment using fluorescence imaging, the grating can be clearly resolved, with a measured average period of 603.6nm.This shows the use of a quasiperiodic hole array as a far-field sub-wavelength imaging device, in a form that is simple to manufacture and include in a realistic imaging system.
Rogers, E.T.F.
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Kao, T.S.
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Savinov, Vassili
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Chen, Y.
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Zheludev, N.I.
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Rogers, E.T.F.
b92cc8ab-0d91-4b2e-b5c7-8a2f490a36a2
Kao, T.S.
92b68d1b-1501-4f42-9707-0f9f90c0ef16
Savinov, Vassili
147c7954-4636-4438-a305-cd78539f7c0a
Chen, Y.
aa3aa967-2aa4-499c-9265-8e6a7e7fb9e5
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6

Rogers, E.T.F., Kao, T.S., Savinov, Vassili, Chen, Y. and Zheludev, N.I. (2010) Super-resolution imaging beyond the near-field. Photon 10, Southampton, United Kingdom. 23 - 26 Aug 2010.

Record type: Conference or Workshop Item (Paper)

Abstract

We report a new technique for sub-wavelength imaging of complex objects in the far-field using a quasiperiodic nanohole array as an imaging lens. Nanohole arrays in metal screens have exhibited many interesting optical properties, including extraordinary transmission of light through periodic and quasiperiodic nanoholes and optical energy concentration [1,2]. We have demonstrated that a quasiperiodic array of nanoholes in a metal screen can concentrate optical energy into hot spots and form sub-wavelength spots in the far-field of the array [1,2] and can be used to image multiple point sources [3]. Here we extend that demonstration to show that a quasiperiodic nanohole array can be used to image more complex structures, such as an array of slits, in the far-field and with sub-wavelength resolution. Figure 1 (a) shows the imaging arrangement, using a quasiperiodic hole array in the place of a conventional lens. The object structure consists of an array of 10 slits, each 300nm x 1.5µm, with a pitch of 600nm and a wavelength of 660nm. The object is 13.5µm away from the quasiperiodic nanohole array and an image is formed 13.5µm behind the array. Assuming the grating lines are incoherent, as would be the case in a biological experiment using fluorescence imaging, the grating can be clearly resolved, with a measured average period of 603.6nm.This shows the use of a quasiperiodic hole array as a far-field sub-wavelength imaging device, in a form that is simple to manufacture and include in a realistic imaging system.

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e-pub ahead of print date: 2010
Venue - Dates: Photon 10, Southampton, United Kingdom, 2010-08-23 - 2010-08-26
Organisations: Optoelectronics Research Centre, Physics & Astronomy

Identifiers

Local EPrints ID: 340465
URI: https://eprints.soton.ac.uk/id/eprint/340465
PURE UUID: 98210f37-c188-4615-90f8-54bda961596f
ORCID for Vassili Savinov: ORCID iD orcid.org/0000-0001-7203-7222
ORCID for N.I. Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

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Date deposited: 22 Jun 2012 09:32
Last modified: 07 Sep 2019 00:39

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Contributors

Author: E.T.F. Rogers
Author: T.S. Kao
Author: Vassili Savinov ORCID iD
Author: Y. Chen
Author: N.I. Zheludev ORCID iD

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