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Engineering the Reststrahlen band with hybrid plasmon/phonon excitations

Published online by Cambridge University Press:  28 December 2015

W. Streyer
Affiliation:
Micro and Nanotechnology Laboratory, University of Illinois at Urbana Champaign, Electrical and Computer Engineering, 208 North Wright St, Urbana, Illinois, USA
K. Feng
Affiliation:
University of Notre Dame, Electrical Engineering, Notre Dame, Indiana, USA
Y. Zhong
Affiliation:
Micro and Nanotechnology Laboratory, University of Illinois at Urbana Champaign, Electrical and Computer Engineering, 208 North Wright St, Urbana, Illinois, USA
A.J. Hoffman
Affiliation:
University of Notre Dame, Electrical Engineering, Notre Dame, Indiana, USA
D. Wasserman*
Affiliation:
Micro and Nanotechnology Laboratory, University of Illinois at Urbana Champaign, Electrical and Computer Engineering, 208 North Wright St, Urbana, Illinois, USA
*
Address all correspondence to D. Wasserman at dwass@illinois.edu
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Abstract

There has been increasing interest in so-called phononic materials, which can support surface modes known as surface phonon polaritons, consisting of electromagnetic waves coupled to lattice vibrations at the surface of a polar material. While such excitations have a variety of desirable features, they are limited to the spectral range between a material's longitudinal and transverse optical phonon frequencies. In this work, we demonstrate that for materials whose free-carrier concentrations can be controlled, hybrid plasmonic/phononic modes can be supported across a range of frequencies including those generally forbidden by purely phononic materials.

Information

Type
Plasmonics, Photonics, and Metamaterials Research Letters
Copyright
Copyright © Materials Research Society 2015 

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