Effect of Surface Plasmon Coupling to Optical Cavity Modes on the Field Enhancement and Spectral Response of Dimer-Based sensors

Salma Alrasheed; Enzo M. Di Fabrizio

doi:10.1038/s41598-017-11140-0

Effect of Surface Plasmon Coupling to Optical Cavity Modes on the Field Enhancement and Spectral Response of Dimer-Based sensors

Salma Alrasheed, Enzo M. Di Fabrizio

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

14 Scopus citations

Abstract

We present a theoretical approach to narrow the plasmon linewidth and enhance the near-field intensity at a plasmonic dimer gap (hot spot) through coupling the electric localized surface plasmon (LSP) resonance of a silver hemispherical dimer with the resonant modes of a Fabry-Perot (FP) cavity. The strong coupling is demonstrated by the large anticrossing in the reflection spectra and a Rabi splitting of 76 meV. Up to 2-fold enhancement increase can be achieved compared to that without using the cavity. Such high field enhancement has potential applications in optics, including sensors and high resolution imaging devices. In addition, the resonance splitting allows for greater flexibility in using the same array at different wavelengths. We then further propose a practical design to realize such a device and include dimers of different shapes and materials.

Original language	English (US)
Journal	Scientific Reports
Volume	7
Issue number	1
DOIs	https://doi.org/10.1038/s41598-017-11140-0
State	Published - Sep 5 2017

Access to Document

10.1038/s41598-017-11140-0

https://repository.kaust.edu.sa/bitstream/10754/625443/1/s41598-017-11140-0.pdf

Cite this

@article{cd4c2a00667a4b028df7632b1943e2bf,

title = "Effect of Surface Plasmon Coupling to Optical Cavity Modes on the Field Enhancement and Spectral Response of Dimer-Based sensors",

abstract = "We present a theoretical approach to narrow the plasmon linewidth and enhance the near-field intensity at a plasmonic dimer gap (hot spot) through coupling the electric localized surface plasmon (LSP) resonance of a silver hemispherical dimer with the resonant modes of a Fabry-Perot (FP) cavity. The strong coupling is demonstrated by the large anticrossing in the reflection spectra and a Rabi splitting of 76 meV. Up to 2-fold enhancement increase can be achieved compared to that without using the cavity. Such high field enhancement has potential applications in optics, including sensors and high resolution imaging devices. In addition, the resonance splitting allows for greater flexibility in using the same array at different wavelengths. We then further propose a practical design to realize such a device and include dimers of different shapes and materials.",

author = "Salma Alrasheed and {Di Fabrizio}, {Enzo M.}",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: We thank SMILEs lab members at King Abdullah University of Science and Technology for the fruitful discussions and suggestions. King Abdullah University of Science and Technology (OCRF-2014-CRG3-62140384).",

year = "2017",

month = sep,

day = "5",

doi = "10.1038/s41598-017-11140-0",

language = "English (US)",

volume = "7",

journal = "Scientific Reports",

issn = "2045-2322",

publisher = "Nature Research",

number = "1",

}

TY - JOUR

T1 - Effect of Surface Plasmon Coupling to Optical Cavity Modes on the Field Enhancement and Spectral Response of Dimer-Based sensors

AU - Alrasheed, Salma

AU - Di Fabrizio, Enzo M.

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: We thank SMILEs lab members at King Abdullah University of Science and Technology for the fruitful discussions and suggestions. King Abdullah University of Science and Technology (OCRF-2014-CRG3-62140384).

PY - 2017/9/5

Y1 - 2017/9/5

N2 - We present a theoretical approach to narrow the plasmon linewidth and enhance the near-field intensity at a plasmonic dimer gap (hot spot) through coupling the electric localized surface plasmon (LSP) resonance of a silver hemispherical dimer with the resonant modes of a Fabry-Perot (FP) cavity. The strong coupling is demonstrated by the large anticrossing in the reflection spectra and a Rabi splitting of 76 meV. Up to 2-fold enhancement increase can be achieved compared to that without using the cavity. Such high field enhancement has potential applications in optics, including sensors and high resolution imaging devices. In addition, the resonance splitting allows for greater flexibility in using the same array at different wavelengths. We then further propose a practical design to realize such a device and include dimers of different shapes and materials.

AB - We present a theoretical approach to narrow the plasmon linewidth and enhance the near-field intensity at a plasmonic dimer gap (hot spot) through coupling the electric localized surface plasmon (LSP) resonance of a silver hemispherical dimer with the resonant modes of a Fabry-Perot (FP) cavity. The strong coupling is demonstrated by the large anticrossing in the reflection spectra and a Rabi splitting of 76 meV. Up to 2-fold enhancement increase can be achieved compared to that without using the cavity. Such high field enhancement has potential applications in optics, including sensors and high resolution imaging devices. In addition, the resonance splitting allows for greater flexibility in using the same array at different wavelengths. We then further propose a practical design to realize such a device and include dimers of different shapes and materials.

UR - http://hdl.handle.net/10754/625443

UR - https://www.nature.com/articles/s41598-017-11140-0

UR - http://www.scopus.com/inward/record.url?scp=85028825112&partnerID=8YFLogxK

U2 - 10.1038/s41598-017-11140-0

DO - 10.1038/s41598-017-11140-0

M3 - Article

C2 - 28874769

SN - 2045-2322

VL - 7

JO - Scientific Reports

JF - Scientific Reports

IS - 1

ER -

Effect of Surface Plasmon Coupling to Optical Cavity Modes on the Field Enhancement and Spectral Response of Dimer-Based sensors

Abstract

Access to Document

Other files and links

Fingerprint

Cite this