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Gold Metasurfaces for Light Absorption Enhancement via Block Copolymer Lithography

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Gold Metasurfaces for Light Absorption Enhancement via Block Copolymer Lithography. / Hulkkonen, Hanna; Niemi, Tapio.

2018. Paper presented at European Material Research Society conference, Strasbourg, France.

Research output: Other conference contributionPaper, poster or abstractScientific

Harvard

Hulkkonen, H & Niemi, T 2018, 'Gold Metasurfaces for Light Absorption Enhancement via Block Copolymer Lithography' Paper presented at European Material Research Society conference, Strasbourg, France, 18/06/18 - 22/06/18, .

APA

Hulkkonen, H., & Niemi, T. (2018). Gold Metasurfaces for Light Absorption Enhancement via Block Copolymer Lithography. Paper presented at European Material Research Society conference, Strasbourg, France.

Vancouver

Hulkkonen H, Niemi T. Gold Metasurfaces for Light Absorption Enhancement via Block Copolymer Lithography. 2018. Paper presented at European Material Research Society conference, Strasbourg, France.

Author

Hulkkonen, Hanna ; Niemi, Tapio. / Gold Metasurfaces for Light Absorption Enhancement via Block Copolymer Lithography. Paper presented at European Material Research Society conference, Strasbourg, France.

Bibtex - Download

@conference{2f00462dbc744c2d9f69617d665be9f5,
title = "Gold Metasurfaces for Light Absorption Enhancement via Block Copolymer Lithography",
abstract = "Optical properties of metals are often characterized by high reflectance and losses. Recently, “total“ optical absorption in metal films has been of interest in applications such as biosensing, nonlinear optics and solar energy harvesting. Attempts to enhance the absorption have been made by depositing lossy dielectric or semiconductor thin films or nanostructuring the surface [1]. Here we have combined block copolymer lithography (BCP) with a template stripping process to create metasurfaces that exhibit strong light absorption in the visible range.An inverse pattern was etched onto a Si wafer using a mask made from poly(styrene-vinylpyridine) as described previously [2]. A thin layer of Au was deposited on the patterns and a support was attached on top using UV-curable epoxy. Due to the poor adhesion of Au on Si, the top layers could be cleanly separated from the Si mold revealing a high-quality nanostructured Au film.BCP lithography can produce sub-wavelength structures over large areas with ease and template stripping enables the transfer of patterns onto a variety of rigid, flexible and curved substrates. The Au films could absorb > 95{\%} of light up to 550 nm, which could also be seen as altered coloring. We expect to incorporate the material into sensor surfaces and plasmonic devices that generate energetic hot electrons.(1) Kats M, Capasso F, Las. Photon. Rev. 2016;5(735)(2) Hulkkonen H, Salminen T, Niemi T, ACS Appl. Mater. Interfaces. 2017;9(37)",
author = "Hanna Hulkkonen and Tapio Niemi",
year = "2018",
month = "6",
day = "18",
language = "English",
note = "European Material Research Society conference : 2018 Spring Meeting, E-MRS 2018 ; Conference date: 18-06-2018 Through 22-06-2018",
url = "https://www.european-mrs.com/meetings/2018-spring-meeting",

}

RIS (suitable for import to EndNote) - Download

TY - CONF

T1 - Gold Metasurfaces for Light Absorption Enhancement via Block Copolymer Lithography

AU - Hulkkonen, Hanna

AU - Niemi, Tapio

PY - 2018/6/18

Y1 - 2018/6/18

N2 - Optical properties of metals are often characterized by high reflectance and losses. Recently, “total“ optical absorption in metal films has been of interest in applications such as biosensing, nonlinear optics and solar energy harvesting. Attempts to enhance the absorption have been made by depositing lossy dielectric or semiconductor thin films or nanostructuring the surface [1]. Here we have combined block copolymer lithography (BCP) with a template stripping process to create metasurfaces that exhibit strong light absorption in the visible range.An inverse pattern was etched onto a Si wafer using a mask made from poly(styrene-vinylpyridine) as described previously [2]. A thin layer of Au was deposited on the patterns and a support was attached on top using UV-curable epoxy. Due to the poor adhesion of Au on Si, the top layers could be cleanly separated from the Si mold revealing a high-quality nanostructured Au film.BCP lithography can produce sub-wavelength structures over large areas with ease and template stripping enables the transfer of patterns onto a variety of rigid, flexible and curved substrates. The Au films could absorb > 95% of light up to 550 nm, which could also be seen as altered coloring. We expect to incorporate the material into sensor surfaces and plasmonic devices that generate energetic hot electrons.(1) Kats M, Capasso F, Las. Photon. Rev. 2016;5(735)(2) Hulkkonen H, Salminen T, Niemi T, ACS Appl. Mater. Interfaces. 2017;9(37)

AB - Optical properties of metals are often characterized by high reflectance and losses. Recently, “total“ optical absorption in metal films has been of interest in applications such as biosensing, nonlinear optics and solar energy harvesting. Attempts to enhance the absorption have been made by depositing lossy dielectric or semiconductor thin films or nanostructuring the surface [1]. Here we have combined block copolymer lithography (BCP) with a template stripping process to create metasurfaces that exhibit strong light absorption in the visible range.An inverse pattern was etched onto a Si wafer using a mask made from poly(styrene-vinylpyridine) as described previously [2]. A thin layer of Au was deposited on the patterns and a support was attached on top using UV-curable epoxy. Due to the poor adhesion of Au on Si, the top layers could be cleanly separated from the Si mold revealing a high-quality nanostructured Au film.BCP lithography can produce sub-wavelength structures over large areas with ease and template stripping enables the transfer of patterns onto a variety of rigid, flexible and curved substrates. The Au films could absorb > 95% of light up to 550 nm, which could also be seen as altered coloring. We expect to incorporate the material into sensor surfaces and plasmonic devices that generate energetic hot electrons.(1) Kats M, Capasso F, Las. Photon. Rev. 2016;5(735)(2) Hulkkonen H, Salminen T, Niemi T, ACS Appl. Mater. Interfaces. 2017;9(37)

M3 - Paper, poster or abstract

ER -