Strip and gap plasmon polariton optical resonators

Thomas Søndergaard, Sergey Bozhevolnyi

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

pp. 9-19
Udgivelsesdato: JAN
OriginalsprogEngelsk
TidsskriftIPPS physica status solidi (b)
Vol/bind245
Udgave nummer1
Sider (fra-til)9-19
ISSN0370-1972
DOI
StatusUdgivet - 1. jan. 2008
Udgivet eksterntJa

Fingeraftryk

Optical resonators
optical resonators
polaritons
strip
Electric fields
Scattering
Silver
Strip metal
Wavelength
Application programs
Integral equations
Resonators
Boundary conditions
electric fields
augmentation
silver
metal strips
resonance scattering
standing waves
wavelengths

Citer dette

@article{8843c720443d11dd9fbe000ea68e967b,
title = "Strip and gap plasmon polariton optical resonators",
abstract = "A rectangular silver strip and two strips separated by a narrow gap are considered as optical resonators. A surface integral equation method is used to study theoretically their scattering cross section and local enhancement of the electric field relative to the incident wave. Peaks in the scattering spectra are shown to be related to the excitation of standing waves caused by forward and backward travelling slow plasmon polaritons (PPs) in the silver strip or in the gap between two strips. This is shown via analysis of the electric near‐field inside and outside the strips, and by showing that an increase of the length of strips equal to half the slow PP wavelength re‐ sults in a scattering resonance at app. the same wavelength. We study the broadening of resonances with strip thickness or gap size, respectively, for the two types of resonators. For field enhancement purposes we consider taking advantage of the fact that the electric field component of slow PPs along the axis of PP propagation is dominating inside the metal strips. Due to this fact and the electromagnetics boundary conditions forcing the surface normal electric field component to jump across the silver‐air interface a small (5 nm) gap introduced in one of the strips leads to a factor ∼25 enhancement of the field magnitude.",
author = "Thomas S{\o}ndergaard and Sergey Bozhevolnyi",
year = "2008",
month = "1",
day = "1",
doi = "10.1002/pssb.200743225",
language = "English",
volume = "245",
pages = "9--19",
journal = "IPPS physica status solidi (b)",
issn = "0370-1972",
publisher = "Wiley Online",
number = "1",

}

Strip and gap plasmon polariton optical resonators. / Søndergaard, Thomas; Bozhevolnyi, Sergey.

I: IPPS physica status solidi (b), Bind 245, Nr. 1, 01.01.2008, s. 9-19.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Strip and gap plasmon polariton optical resonators

AU - Søndergaard, Thomas

AU - Bozhevolnyi, Sergey

PY - 2008/1/1

Y1 - 2008/1/1

N2 - A rectangular silver strip and two strips separated by a narrow gap are considered as optical resonators. A surface integral equation method is used to study theoretically their scattering cross section and local enhancement of the electric field relative to the incident wave. Peaks in the scattering spectra are shown to be related to the excitation of standing waves caused by forward and backward travelling slow plasmon polaritons (PPs) in the silver strip or in the gap between two strips. This is shown via analysis of the electric near‐field inside and outside the strips, and by showing that an increase of the length of strips equal to half the slow PP wavelength re‐ sults in a scattering resonance at app. the same wavelength. We study the broadening of resonances with strip thickness or gap size, respectively, for the two types of resonators. For field enhancement purposes we consider taking advantage of the fact that the electric field component of slow PPs along the axis of PP propagation is dominating inside the metal strips. Due to this fact and the electromagnetics boundary conditions forcing the surface normal electric field component to jump across the silver‐air interface a small (5 nm) gap introduced in one of the strips leads to a factor ∼25 enhancement of the field magnitude.

AB - A rectangular silver strip and two strips separated by a narrow gap are considered as optical resonators. A surface integral equation method is used to study theoretically their scattering cross section and local enhancement of the electric field relative to the incident wave. Peaks in the scattering spectra are shown to be related to the excitation of standing waves caused by forward and backward travelling slow plasmon polaritons (PPs) in the silver strip or in the gap between two strips. This is shown via analysis of the electric near‐field inside and outside the strips, and by showing that an increase of the length of strips equal to half the slow PP wavelength re‐ sults in a scattering resonance at app. the same wavelength. We study the broadening of resonances with strip thickness or gap size, respectively, for the two types of resonators. For field enhancement purposes we consider taking advantage of the fact that the electric field component of slow PPs along the axis of PP propagation is dominating inside the metal strips. Due to this fact and the electromagnetics boundary conditions forcing the surface normal electric field component to jump across the silver‐air interface a small (5 nm) gap introduced in one of the strips leads to a factor ∼25 enhancement of the field magnitude.

U2 - 10.1002/pssb.200743225

DO - 10.1002/pssb.200743225

M3 - Journal article

VL - 245

SP - 9

EP - 19

JO - IPPS physica status solidi (b)

JF - IPPS physica status solidi (b)

SN - 0370-1972

IS - 1

ER -