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Optical response of finite-thickness ultrathin plasmonic films

Published online by Cambridge University Press:  15 August 2018

Igor V. Bondarev Open the ORCID record for Igor V. Bondarev [Opens in a new window] ,
Hamze Mousavi  and
Vladimir M. Shalaev
Igor V. Bondarev*
Affiliation:
Math & Physics Department, North Carolina Central University, Durham, NC 27707, USA
Hamze Mousavi
Affiliation:
Math & Physics Department, North Carolina Central University, Durham, NC 27707, USA
Vladimir M. Shalaev
Affiliation:
School of Electrical & Computer Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, IN 47907, USA
*
Address all correspondence to Igor V. Bondarev at ibondarev@nccu.edu
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Abstract

We show that the optical response of ultrathin metallic films of finite lateral size and thickness can feature peculiar magneto-optical effects resulting from the spatial confinement of the electron motion. In particular, the frequency dependence of the magnetic permeability of the film exhibits a sharp resonance structure shifting to the red as the film aspect ratio increases. The films can also be negatively refractive in the IR frequency range under proper tuning. We show that these magneto-optical properties can be controlled by adjusting the film chemical composition, plasmonic material quality, the aspect ratio, and the surroundings of the film.

Type
Research Letters
Information
MRS Communications , Volume 8 , Issue 3 , September 2018 , pp. 1092 - 1097
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Copyright
Copyright © Materials Research Society 2018 

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