Bifunctional metamirrors for simultaneous polarization splitting and focusing

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Resumé

Metasurfaces - artificial 2D sheet structures with sub-wavelength periodicity and dimensions of elements - are paving the way to improve traditional optical components by integrating multiple functionalities into one optically flat device. With the progress in nano-fabrication methods, different applications of metasurfaces were demonstrated experimentally, ranging from artificial plasmonic colouring to flat optical components. In this work, we demonstrate implementation of a bifunctional gap-surface-plasmon-based metasurface which, in reflection mode, splits orthogonal linear light polarizations and focuses into different focal spots. The fabricated configuration consists of 50 nm thick gold nanobricks with different lateral dimensions, organized in an array of 240 nm x 240 nm unit cells on the top of a 50 nm thick silicon dioxide layer, which is deposited on an optically thick reflecting gold substrate. Structure is fabricated using standard electron beam lithography and lift-off techniques. Characterization is performed using scanning electron microscopy and optical measurements, including investigation of wavelength dependence of efficiency, focal length and polarization extinction ratio. Our device features high efficiency (up to ∼65%) and polarization extinction ratio (up to ∼30 dB), exhibiting broadband response in the near-infrared band (750 950 nm wavelength) with the focal length and numerical aperture dependent on the wavelength of incident light. The proposed optical component can be straightforwardly integrated into photonic circuits or fiber optic devices which employ polarization multiplexing.

OriginalsprogEngelsk
TitelProceedings of SPIE Photonics Europe : Metamaterials XI
RedaktørerAllan D. Boardman, Anatoly V. Zayats, Kevin F. MacDonald
Vol/bind10671
ForlagSPIE - International Society for Optical Engineering
Publikationsdatomaj 2018
Artikelnummer106712C
ISBN (Elektronisk)9781510618688
DOI
StatusUdgivet - maj 2018
BegivenhedSPIE Photonics Europe 2018 - Strasbourg, Frankrig
Varighed: 22. apr. 201826. apr. 2018

Konference

KonferenceSPIE Photonics Europe 2018
LandFrankrig
ByStrasbourg
Periode22/04/201826/04/2018
SponsorCNRS - The National Center for Scientific Research, et al., iCube, Investissements d'Avenvir, Strasbourg the Europtimist, The Society of Photo-Optical Instrumentation Engineers (SPIE)

Fingeraftryk

polarization
wavelengths
extinction
gold
nanofabrication
numerical aperture
multiplexing
optical measurement
periodic variations
fiber optics
lithography
apertures
photonics
optics
electron beams
silicon dioxide
broadband
scanning electron microscopy
configurations
cells

Citer dette

Boroviks, S., Deshpande, R. A., Mortensen, N. A., & Bozhevolnyi, S. I. (2018). Bifunctional metamirrors for simultaneous polarization splitting and focusing. I A. D. Boardman, A. V. Zayats, & K. F. MacDonald (red.), Proceedings of SPIE Photonics Europe: Metamaterials XI (Bind 10671). [106712C] SPIE - International Society for Optical Engineering. https://doi.org/10.1117/12.2306439
Boroviks, Sergejs ; Deshpande, Rucha Anil ; Mortensen, N. Asger ; Bozhevolnyi, Sergey I. / Bifunctional metamirrors for simultaneous polarization splitting and focusing. Proceedings of SPIE Photonics Europe: Metamaterials XI. red. / Allan D. Boardman ; Anatoly V. Zayats ; Kevin F. MacDonald. Bind 10671 SPIE - International Society for Optical Engineering, 2018.
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abstract = "Metasurfaces - artificial 2D sheet structures with sub-wavelength periodicity and dimensions of elements - are paving the way to improve traditional optical components by integrating multiple functionalities into one optically flat device. With the progress in nano-fabrication methods, different applications of metasurfaces were demonstrated experimentally, ranging from artificial plasmonic colouring to flat optical components. In this work, we demonstrate implementation of a bifunctional gap-surface-plasmon-based metasurface which, in reflection mode, splits orthogonal linear light polarizations and focuses into different focal spots. The fabricated configuration consists of 50 nm thick gold nanobricks with different lateral dimensions, organized in an array of 240 nm x 240 nm unit cells on the top of a 50 nm thick silicon dioxide layer, which is deposited on an optically thick reflecting gold substrate. Structure is fabricated using standard electron beam lithography and lift-off techniques. Characterization is performed using scanning electron microscopy and optical measurements, including investigation of wavelength dependence of efficiency, focal length and polarization extinction ratio. Our device features high efficiency (up to ∼65{\%}) and polarization extinction ratio (up to ∼30 dB), exhibiting broadband response in the near-infrared band (750 950 nm wavelength) with the focal length and numerical aperture dependent on the wavelength of incident light. The proposed optical component can be straightforwardly integrated into photonic circuits or fiber optic devices which employ polarization multiplexing.",
keywords = "at optics, gap surface plasmons, gradient metasurfaces, plasmonics",
author = "Sergejs Boroviks and Deshpande, {Rucha Anil} and Mortensen, {N. Asger} and Bozhevolnyi, {Sergey I.}",
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Boroviks, S, Deshpande, RA, Mortensen, NA & Bozhevolnyi, SI 2018, Bifunctional metamirrors for simultaneous polarization splitting and focusing. i AD Boardman, AV Zayats & KF MacDonald (red), Proceedings of SPIE Photonics Europe: Metamaterials XI. bind 10671, 106712C, SPIE - International Society for Optical Engineering, SPIE Photonics Europe 2018, Strasbourg, Frankrig, 22/04/2018. https://doi.org/10.1117/12.2306439

Bifunctional metamirrors for simultaneous polarization splitting and focusing. / Boroviks, Sergejs; Deshpande, Rucha Anil; Mortensen, N. Asger; Bozhevolnyi, Sergey I.

Proceedings of SPIE Photonics Europe: Metamaterials XI. red. / Allan D. Boardman; Anatoly V. Zayats; Kevin F. MacDonald. Bind 10671 SPIE - International Society for Optical Engineering, 2018. 106712C.

Publikation: Bidrag til bog/antologi/rapport/konference-proceedingKonferencebidrag i proceedingsForskningpeer review

TY - GEN

T1 - Bifunctional metamirrors for simultaneous polarization splitting and focusing

AU - Boroviks, Sergejs

AU - Deshpande, Rucha Anil

AU - Mortensen, N. Asger

AU - Bozhevolnyi, Sergey I.

PY - 2018/5

Y1 - 2018/5

N2 - Metasurfaces - artificial 2D sheet structures with sub-wavelength periodicity and dimensions of elements - are paving the way to improve traditional optical components by integrating multiple functionalities into one optically flat device. With the progress in nano-fabrication methods, different applications of metasurfaces were demonstrated experimentally, ranging from artificial plasmonic colouring to flat optical components. In this work, we demonstrate implementation of a bifunctional gap-surface-plasmon-based metasurface which, in reflection mode, splits orthogonal linear light polarizations and focuses into different focal spots. The fabricated configuration consists of 50 nm thick gold nanobricks with different lateral dimensions, organized in an array of 240 nm x 240 nm unit cells on the top of a 50 nm thick silicon dioxide layer, which is deposited on an optically thick reflecting gold substrate. Structure is fabricated using standard electron beam lithography and lift-off techniques. Characterization is performed using scanning electron microscopy and optical measurements, including investigation of wavelength dependence of efficiency, focal length and polarization extinction ratio. Our device features high efficiency (up to ∼65%) and polarization extinction ratio (up to ∼30 dB), exhibiting broadband response in the near-infrared band (750 950 nm wavelength) with the focal length and numerical aperture dependent on the wavelength of incident light. The proposed optical component can be straightforwardly integrated into photonic circuits or fiber optic devices which employ polarization multiplexing.

AB - Metasurfaces - artificial 2D sheet structures with sub-wavelength periodicity and dimensions of elements - are paving the way to improve traditional optical components by integrating multiple functionalities into one optically flat device. With the progress in nano-fabrication methods, different applications of metasurfaces were demonstrated experimentally, ranging from artificial plasmonic colouring to flat optical components. In this work, we demonstrate implementation of a bifunctional gap-surface-plasmon-based metasurface which, in reflection mode, splits orthogonal linear light polarizations and focuses into different focal spots. The fabricated configuration consists of 50 nm thick gold nanobricks with different lateral dimensions, organized in an array of 240 nm x 240 nm unit cells on the top of a 50 nm thick silicon dioxide layer, which is deposited on an optically thick reflecting gold substrate. Structure is fabricated using standard electron beam lithography and lift-off techniques. Characterization is performed using scanning electron microscopy and optical measurements, including investigation of wavelength dependence of efficiency, focal length and polarization extinction ratio. Our device features high efficiency (up to ∼65%) and polarization extinction ratio (up to ∼30 dB), exhibiting broadband response in the near-infrared band (750 950 nm wavelength) with the focal length and numerical aperture dependent on the wavelength of incident light. The proposed optical component can be straightforwardly integrated into photonic circuits or fiber optic devices which employ polarization multiplexing.

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KW - gap surface plasmons

KW - gradient metasurfaces

KW - plasmonics

U2 - 10.1117/12.2306439

DO - 10.1117/12.2306439

M3 - Article in proceedings

AN - SCOPUS:85050114047

VL - 10671

BT - Proceedings of SPIE Photonics Europe

A2 - Boardman, Allan D.

A2 - Zayats, Anatoly V.

A2 - MacDonald, Kevin F.

PB - SPIE - International Society for Optical Engineering

ER -

Boroviks S, Deshpande RA, Mortensen NA, Bozhevolnyi SI. Bifunctional metamirrors for simultaneous polarization splitting and focusing. I Boardman AD, Zayats AV, MacDonald KF, red., Proceedings of SPIE Photonics Europe: Metamaterials XI. Bind 10671. SPIE - International Society for Optical Engineering. 2018. 106712C https://doi.org/10.1117/12.2306439