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Optothermally Tuned Charge Transfer Plasmons in Au-Ge2Sb2Te5 Core-Shell Assemblies

Published online by Cambridge University Press:  05 March 2018

Burak Gerislioglu ,
Arash Ahmadivand  and
Nezih Pala
Burak Gerislioglu*
Affiliation:
Department of Electrical and Computer Engineering, Florida International University, 10555 W Flagler St., Miami, FL33174, U.S.A.
Arash Ahmadivand
Affiliation:
Department of Electrical and Computer Engineering, Florida International University, 10555 W Flagler St., Miami, FL33174, U.S.A.
Nezih Pala
Affiliation:
Department of Electrical and Computer Engineering, Florida International University, 10555 W Flagler St., Miami, FL33174, U.S.A.
*
*(Email: bgeri002@fiu.edu)
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Abstract

Tunable plasmonic resonances across the visible and near infrared spectra have provided novel ways to develop next-generation nanophotonic devices. Here, by utilizing optothermally controllable phase-changing material (PCM), we studied highly tunable charge transfer plasmon (CTP) resonance modes. To this end, we have designed a two-member dimer assembly including gold cores and Ge2Sb2Te5 (GST) shells in distant, touching, and overlapping conditions. We successfully demonstrated that toggling between amorphous (dielectric) and crystalline (conductive) phases of GST allows for achieving tunable dipolar and CTP resonances along the near-infrared spectrum. The proposed dimer structures can help forming optothermally controlled devices without further morphological variations in the geometry of the design, and having strong potential for advanced plasmon modulation and fast data routing.

Keywords

phase transformationamorphouscore/shell
Type
Articles
Information
MRS Advances , Volume 3 , Issue 33: Electronics, Magnetics and Photonics , 2018 , pp. 1919 - 1924
Copyright
Copyright © Materials Research Society 2018 

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