Three-dimensional surface lattice plasmon resonance effect from plasmonic inclined nanostructures via one-step stencil lithography

Plasmonic nanostructures allow the manipulation and confinement of optical fields on the sub-wavelength scale. The local field enhancement and environmentally sensitive resonance characteristics provided by these nanostructures are of high importance for biological and chemical sensing. Recently, su...

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Main Authors: Jeong Tae-In, Kim Sehyeon, Kim San, Shin Minchan, Gliserin Alexander, Kang Tae Young, Kim Kyujung, Kim Seungchul
Format: Article
Language:English
Published: De Gruyter 2024-01-01
Series:Nanophotonics
Subjects:
Online Access:https://doi.org/10.1515/nanoph-2023-0755
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author Jeong Tae-In
Kim Sehyeon
Kim San
Shin Minchan
Gliserin Alexander
Kang Tae Young
Kim Kyujung
Kim Seungchul
author_facet Jeong Tae-In
Kim Sehyeon
Kim San
Shin Minchan
Gliserin Alexander
Kang Tae Young
Kim Kyujung
Kim Seungchul
author_sort Jeong Tae-In
collection DOAJ
description Plasmonic nanostructures allow the manipulation and confinement of optical fields on the sub-wavelength scale. The local field enhancement and environmentally sensitive resonance characteristics provided by these nanostructures are of high importance for biological and chemical sensing. Recently, surface lattice plasmon resonance (SLR) research has attracted much interest because of its superior quality factor (Q-factor) compared to that of localized surface plasmon resonances (LSPR), which is facilitated by resonant plasmonic mode coupling between individual nanostructures over a large area. This advantage can be further enhanced by utilizing asymmetric 3D structures rather than low-height (typically height < ∼60 nm) structure arrays, which results in stronger coupling due to an increased mode volume. However, fabricating 3D, high-aspect ratio, symmetry-breaking structures is a complex and challenging process even with state-of-the-art fabrication technology. Here, we report a plasmonic metasurface of 3D inclined structures produced via commercial TEM grid–based stencil lithography with a Q-factor of 101.6, a refractive index sensitivity of 291 nm/RIU, and a figure of merit (FOM) of 44.7 in the visible wavelength range at a refractive index of 1.5 by utilizing the 3D SLR enhancement effect, which exceeds the performance of most LSPR systems (Q < ∼10). The symmetry-breaking 3D inclined structures that are fabricated by electron beam evaporation at an angle increase the polarizability of the metasurface and the directionality of the diffractively scattered radiative field responsible for SLR mode coupling. Additionally, we explore the role of spatial coherence in facilitating the SLR effect and thus a high-Q plasmonic response from the nanostructures. Our work demonstrates the feasibility of producing 3D inclined structure arrays with pronounced SLR enhancement for high biological sensitivity by utilizing the previously unexplored inclined stencil lithography, which opens the way to fabricate highly sensitive plasmonic metasurfaces with this novel simple technique.
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spelling doaj.art-e24745fdd30c4334874de4800e5036cb2024-04-15T07:42:04ZengDe GruyterNanophotonics2192-86142024-01-011371169118010.1515/nanoph-2023-0755Three-dimensional surface lattice plasmon resonance effect from plasmonic inclined nanostructures via one-step stencil lithographyJeong Tae-In0Kim Sehyeon1Kim San2Shin Minchan3Gliserin Alexander4Kang Tae Young5Kim Kyujung6Kim Seungchul7Department of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan46241, Republic of KoreaDepartment of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan46241, Republic of KoreaDepartment of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan46241, Republic of KoreaDepartment of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan46241, Republic of KoreaDepartment of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan46241, Republic of KoreaDepartment of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan46241, Republic of KoreaDepartment of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan46241, Republic of KoreaDepartment of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan46241, Republic of KoreaPlasmonic nanostructures allow the manipulation and confinement of optical fields on the sub-wavelength scale. The local field enhancement and environmentally sensitive resonance characteristics provided by these nanostructures are of high importance for biological and chemical sensing. Recently, surface lattice plasmon resonance (SLR) research has attracted much interest because of its superior quality factor (Q-factor) compared to that of localized surface plasmon resonances (LSPR), which is facilitated by resonant plasmonic mode coupling between individual nanostructures over a large area. This advantage can be further enhanced by utilizing asymmetric 3D structures rather than low-height (typically height < ∼60 nm) structure arrays, which results in stronger coupling due to an increased mode volume. However, fabricating 3D, high-aspect ratio, symmetry-breaking structures is a complex and challenging process even with state-of-the-art fabrication technology. Here, we report a plasmonic metasurface of 3D inclined structures produced via commercial TEM grid–based stencil lithography with a Q-factor of 101.6, a refractive index sensitivity of 291 nm/RIU, and a figure of merit (FOM) of 44.7 in the visible wavelength range at a refractive index of 1.5 by utilizing the 3D SLR enhancement effect, which exceeds the performance of most LSPR systems (Q < ∼10). The symmetry-breaking 3D inclined structures that are fabricated by electron beam evaporation at an angle increase the polarizability of the metasurface and the directionality of the diffractively scattered radiative field responsible for SLR mode coupling. Additionally, we explore the role of spatial coherence in facilitating the SLR effect and thus a high-Q plasmonic response from the nanostructures. Our work demonstrates the feasibility of producing 3D inclined structure arrays with pronounced SLR enhancement for high biological sensitivity by utilizing the previously unexplored inclined stencil lithography, which opens the way to fabricate highly sensitive plasmonic metasurfaces with this novel simple technique.https://doi.org/10.1515/nanoph-2023-0755surface lattice plasmon resonancestencil lithographytem gridnanophotonics
spellingShingle Jeong Tae-In
Kim Sehyeon
Kim San
Shin Minchan
Gliserin Alexander
Kang Tae Young
Kim Kyujung
Kim Seungchul
Three-dimensional surface lattice plasmon resonance effect from plasmonic inclined nanostructures via one-step stencil lithography
Nanophotonics
surface lattice plasmon resonance
stencil lithography
tem grid
nanophotonics
title Three-dimensional surface lattice plasmon resonance effect from plasmonic inclined nanostructures via one-step stencil lithography
title_full Three-dimensional surface lattice plasmon resonance effect from plasmonic inclined nanostructures via one-step stencil lithography
title_fullStr Three-dimensional surface lattice plasmon resonance effect from plasmonic inclined nanostructures via one-step stencil lithography
title_full_unstemmed Three-dimensional surface lattice plasmon resonance effect from plasmonic inclined nanostructures via one-step stencil lithography
title_short Three-dimensional surface lattice plasmon resonance effect from plasmonic inclined nanostructures via one-step stencil lithography
title_sort three dimensional surface lattice plasmon resonance effect from plasmonic inclined nanostructures via one step stencil lithography
topic surface lattice plasmon resonance
stencil lithography
tem grid
nanophotonics
url https://doi.org/10.1515/nanoph-2023-0755
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