A stretch-tunable plasmonic structure with a polarization-dependent response

Xiaolong Zhu, Sanshui Xiao, Lei Shi, Xiaohan Liu, Jian Zi, Ole Hansen, N. Asger Mortensen

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We experimentally demonstrate a stretchable plasmonic structure
composed of a monolayer array of gold semishells with dielectric cores
on an elastic PDMS substrate. The composite structure is fabricated using
simple and inexpensive self-assembly and transfer-printing techniques,
and it supports Bragg-type surface plasmon resonances whose frequencies
are sensitive to the arrangement of the metallic semishells. Under uniaxial
stretching, the lattice symmetry of this plasmonic structure can be reconfigured
from hexagonal to monoclinic, leading to resonance frequency shifts
from 200 THz to 191 THz for the TM polarization and from 200 THz to
198 THz for the TE polarization with a strain up to 20%, respectively.
Compared with previously reported tunable plasmonic structures, the
reconfiguration of lattice symmetry offers a promising approach to tune the
surface plasmon resonance with a polarization-dependent response at the
standard telecommunication band, and such tunable plasmonic structure
might be exploited in realizing photonic devices such as sensors, switches
and filters.
TidsskriftOptics Express
Udgave nummer5
Sider (fra-til)5237-5242
StatusUdgivet - 2012
Udgivet eksterntJa

Bibliografisk note

This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-5-5237. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.


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