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Metamaterial superlenses operating at visible wavelength for imaging applications

Metamaterial superlenses operating at visible wavelength for imaging applications
Metamaterial superlenses operating at visible wavelength for imaging applications
In this paper, a novel design for a metamaterial lens (superlens) based on a Photonic Crystal (PC) operating at visible wavelengths is reported. The proposed superlens consist of a gallium phosphide (GaP) dielectric slab waveguide with a hexagonal array of silver rods embedded within the GaP dielectric. In-house 2DFDTD numerical method is used to design and optimize the proposed superlens. Several superlenses are designed and integrated within a same dielectric platform, promoting the proof-of-concept (POC) of possible construction of an array of superlenses (or sub-lenses to create an M-Lens) for light field imaging applications. It is shown that the concavity of the superlens and positioning of each sub-lens within the array strongly affects the performances of the image in terms of resolution. Defects and various geometrical shapes are introduced to construct and optimize the proposed superlenses and increase the quality of the image resolution. It is shown that the orientation of the active region (ellipse) along x and y axis has tremendous influence on the quality of image resolution. In order to investigate the performance characteristics of the superlenses, transmitted power is calculated using 2D FDTD for image projections at various distances (in x and y plane). It is also shown, how the proposed superlens structures could be fabricated using standard micro fabrication techniques such as electron beam lithography, inductively coupled Reactive ion etching, and glancing angle evaporation methods. To the best of our knowledge, these are the first reported POC of superlenses, integrated in a monolithic platform suitable for high imaging resolution that can be used for light field imaging applications at visible wavelength. The proposed superlenses (integrated in a single platform M-Lens) will have tremendous impact on imaging applications.
2045-2322
8
Haxha, Shyqyri
050c3916-f12e-43ae-bb6d-d2f13f952999
AbdelMalek, Fathi
3998a3b0-8375-429c-839e-ad30e7098776
Ouerghi, Faouzi
50766890-60d1-440f-a5bb-6e75aad61868
Charlton, Martin
fcf86ab0-8f34-411a-b576-4f684e51e274
Aggoun, Amar
f2c910a0-a90a-4d20-85f6-1115be0325d0
Fang, Xu
96b4b212-496b-4d68-82a4-06df70f94a86
Haxha, Shyqyri
050c3916-f12e-43ae-bb6d-d2f13f952999
AbdelMalek, Fathi
3998a3b0-8375-429c-839e-ad30e7098776
Ouerghi, Faouzi
50766890-60d1-440f-a5bb-6e75aad61868
Charlton, Martin
fcf86ab0-8f34-411a-b576-4f684e51e274
Aggoun, Amar
f2c910a0-a90a-4d20-85f6-1115be0325d0
Fang, Xu
96b4b212-496b-4d68-82a4-06df70f94a86

Haxha, Shyqyri, AbdelMalek, Fathi, Ouerghi, Faouzi, Charlton, Martin, Aggoun, Amar and Fang, Xu (2018) Metamaterial superlenses operating at visible wavelength for imaging applications. Scientific Reports, 8 (16119), 8, [16119]. (doi:10.1038/s41598-018-33572-y).

Record type: Article

Abstract

In this paper, a novel design for a metamaterial lens (superlens) based on a Photonic Crystal (PC) operating at visible wavelengths is reported. The proposed superlens consist of a gallium phosphide (GaP) dielectric slab waveguide with a hexagonal array of silver rods embedded within the GaP dielectric. In-house 2DFDTD numerical method is used to design and optimize the proposed superlens. Several superlenses are designed and integrated within a same dielectric platform, promoting the proof-of-concept (POC) of possible construction of an array of superlenses (or sub-lenses to create an M-Lens) for light field imaging applications. It is shown that the concavity of the superlens and positioning of each sub-lens within the array strongly affects the performances of the image in terms of resolution. Defects and various geometrical shapes are introduced to construct and optimize the proposed superlenses and increase the quality of the image resolution. It is shown that the orientation of the active region (ellipse) along x and y axis has tremendous influence on the quality of image resolution. In order to investigate the performance characteristics of the superlenses, transmitted power is calculated using 2D FDTD for image projections at various distances (in x and y plane). It is also shown, how the proposed superlens structures could be fabricated using standard micro fabrication techniques such as electron beam lithography, inductively coupled Reactive ion etching, and glancing angle evaporation methods. To the best of our knowledge, these are the first reported POC of superlenses, integrated in a monolithic platform suitable for high imaging resolution that can be used for light field imaging applications at visible wavelength. The proposed superlenses (integrated in a single platform M-Lens) will have tremendous impact on imaging applications.

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Accepted/In Press date: 27 September 2018
e-pub ahead of print date: 31 October 2018

Identifiers

Local EPrints ID: 426115
URI: http://eprints.soton.ac.uk/id/eprint/426115
ISSN: 2045-2322
PURE UUID: 92e210b4-a5cf-4a64-834d-5a11b2531748
ORCID for Xu Fang: ORCID iD orcid.org/0000-0003-1735-2654

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Date deposited: 14 Nov 2018 17:30
Last modified: 17 Dec 2019 01:38

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Contributors

Author: Shyqyri Haxha
Author: Fathi AbdelMalek
Author: Faouzi Ouerghi
Author: Martin Charlton
Author: Amar Aggoun
Author: Xu Fang ORCID iD

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