Highly tunable propagating surface plasmons on supported silver nanowires

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Highly tunable propagating surface plasmons on supported silver nanowires. / Wei, Hong; Zhang, Shunping; Tian, Xiaorui; Xu, Hongxing.

I: Proceedings of the National Academy of Sciences, Vol. 110, Nr. 12, 2013, s. 4494-4499.

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Wei, Hong ; Zhang, Shunping ; Tian, Xiaorui ; Xu, Hongxing. / Highly tunable propagating surface plasmons on supported silver nanowires. I: Proceedings of the National Academy of Sciences. 2013 ; Vol. 110, Nr. 12. s. 4494-4499.

RIS

TY - JOUR

T1 - Highly tunable propagating surface plasmons on supported silver nanowires

AU - Wei, Hong

AU - Zhang, Shunping

AU - Tian, Xiaorui

AU - Xu, Hongxing

PY - 2013

Y1 - 2013

N2 - Surface plasmons, the quanta of the collective oscillations of free electrons at metal surface, can be easily tuned by changing the surrounding dielectric materials, which is well known for metal nanoparticles and metal surfaces, but less is known for one-dimensional metal nanowires. Here, we find an extremely large tunability of surface plasmons on Ag nanowires with a beat period of the near-field distribution pattern increasing by 90 nm per nanometer of Al2O3 coating, or by 16 mu m per refractive index unit change in the surrounding medium. Such high sensitivity is crucial to directly control the optical signal distribution for various routing and demultiplexing functions in plasmonic circuits and may pave the way to the development of on-chip ultrasensitive biosensing.

AB - Surface plasmons, the quanta of the collective oscillations of free electrons at metal surface, can be easily tuned by changing the surrounding dielectric materials, which is well known for metal nanoparticles and metal surfaces, but less is known for one-dimensional metal nanowires. Here, we find an extremely large tunability of surface plasmons on Ag nanowires with a beat period of the near-field distribution pattern increasing by 90 nm per nanometer of Al2O3 coating, or by 16 mu m per refractive index unit change in the surrounding medium. Such high sensitivity is crucial to directly control the optical signal distribution for various routing and demultiplexing functions in plasmonic circuits and may pave the way to the development of on-chip ultrasensitive biosensing.

KW - plasmonics

KW - imaging

KW - sensing

KW - quantum dot

KW - modulation

U2 - 10.1073/pnas.1217931110

DO - 10.1073/pnas.1217931110

M3 - Article

VL - 110

SP - 4494

EP - 4499

JO - Proceedings of the National Academy of Sciences

T2 - Proceedings of the National Academy of Sciences

JF - Proceedings of the National Academy of Sciences

SN - 1091-6490

IS - 12

ER -