Enhanced UV/blue fluorescent sensing using metal-dielectric-metal aperture nanoantenna arrays

Quang Minh Ngo; Ying-Lung D. Ho; Jon R. Pugh; Andrei  Sarua; Martin J.  Cryan

doi:10.1016/j.cap.2018.04.007

Enhanced UV/blue fluorescent sensing using metal-dielectric-metal aperture nanoantenna arrays

Quang Minh Ngo, Ying-Lung D. Ho, Jon R. Pugh, Andrei Sarua, Martin J. Cryan

Mathematics, Physics and Electrical Engineering

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

Subwavelength aperture antenna arrays are designed and fabricated for potential applications in fluorescence sensing in the near UV/blue range. They are designed using finite-difference time-domain (FDTD) simulation, fabricated using focused ion beam etching and characterised using angular Fourier spectroscopy. The aperture arrays are formed in the top layer of an aluminum-silica-aluminum trilayer and produce a maximum simulated field intensity enhancement of 5.8 times at 406 nm and highly directive emission with a beamwidth of 8.3 deg. The normal incidence reflection response has been measured and shows reasonable agreement with modelled results. In addition, to investigate higher field intensity enhancements, bowtie aperture arrays are simulated and the influence of parameters such as dielectric gap, position of dipole source, and aperture shape and size are discussed and show enhancements up to 67 times are possible.

Original language	English
Pages (from-to)	793-798
Number of pages	6
Journal	Current Applied Physics
Volume	18
Issue number	7
DOIs	https://doi.org/10.1016/j.cap.2018.04.007
Publication status	Published - 11 Apr 2018

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title = "Enhanced UV/blue fluorescent sensing using metal-dielectric-metal aperture nanoantenna arrays",

abstract = "Subwavelength aperture antenna arrays are designed and fabricated for potential applications in fluorescence sensing in the near UV/blue range. They are designed using finite-difference time-domain (FDTD) simulation, fabricated using focused ion beam etching and characterised using angular Fourier spectroscopy. The aperture arrays are formed in the top layer of an aluminum-silica-aluminum trilayer and produce a maximum simulated field intensity enhancement of 5.8 times at 406 nm and highly directive emission with a beamwidth of 8.3 deg. The normal incidence reflection response has been measured and shows reasonable agreement with modelled results. In addition, to investigate higher field intensity enhancements, bowtie aperture arrays are simulated and the influence of parameters such as dielectric gap, position of dipole source, and aperture shape and size are discussed and show enhancements up to 67 times are possible.",

keywords = "nanoantennas, aperture arrays, plasmonics",

author = "Ngo, {Quang Minh} and Ho, {Ying-Lung D.} and Pugh, {Jon R.} and Andrei Sarua and Cryan, {Martin J.}",

year = "2018",

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doi = "10.1016/j.cap.2018.04.007",

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journal = "Current Applied Physics",

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T1 - Enhanced UV/blue fluorescent sensing using metal-dielectric-metal aperture nanoantenna arrays

AU - Ngo, Quang Minh

AU - Ho, Ying-Lung D.

AU - Pugh, Jon R.

AU - Sarua, Andrei

AU - Cryan, Martin J.

PY - 2018/4/11

Y1 - 2018/4/11

N2 - Subwavelength aperture antenna arrays are designed and fabricated for potential applications in fluorescence sensing in the near UV/blue range. They are designed using finite-difference time-domain (FDTD) simulation, fabricated using focused ion beam etching and characterised using angular Fourier spectroscopy. The aperture arrays are formed in the top layer of an aluminum-silica-aluminum trilayer and produce a maximum simulated field intensity enhancement of 5.8 times at 406 nm and highly directive emission with a beamwidth of 8.3 deg. The normal incidence reflection response has been measured and shows reasonable agreement with modelled results. In addition, to investigate higher field intensity enhancements, bowtie aperture arrays are simulated and the influence of parameters such as dielectric gap, position of dipole source, and aperture shape and size are discussed and show enhancements up to 67 times are possible.

AB - Subwavelength aperture antenna arrays are designed and fabricated for potential applications in fluorescence sensing in the near UV/blue range. They are designed using finite-difference time-domain (FDTD) simulation, fabricated using focused ion beam etching and characterised using angular Fourier spectroscopy. The aperture arrays are formed in the top layer of an aluminum-silica-aluminum trilayer and produce a maximum simulated field intensity enhancement of 5.8 times at 406 nm and highly directive emission with a beamwidth of 8.3 deg. The normal incidence reflection response has been measured and shows reasonable agreement with modelled results. In addition, to investigate higher field intensity enhancements, bowtie aperture arrays are simulated and the influence of parameters such as dielectric gap, position of dipole source, and aperture shape and size are discussed and show enhancements up to 67 times are possible.

KW - nanoantennas

KW - aperture arrays

KW - plasmonics

U2 - 10.1016/j.cap.2018.04.007

DO - 10.1016/j.cap.2018.04.007

M3 - Article

VL - 18

SP - 793

EP - 798

JO - Current Applied Physics

JF - Current Applied Physics

SN - 1567-1739

IS - 7

ER -

Enhanced UV/blue fluorescent sensing using metal-dielectric-metal aperture nanoantenna arrays

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