Electro-Ionic Control of Surface Plasmons in Graphene-Layered Heterostructures
| Autor: | Avinash Kumar Chaurasiya, Jian Yi Pae, Rajdeep Singh Rawat, Marco Battiato, Murukeshan Vadakke Matham, Rohit Medwal, Radhika V. Nair |
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| Přispěvatelé: | School of Mechanical and Aerospace Engineering, School of Physical and Mathematical Sciences, Center for Optical and Laser Engineering, Singapore Centre for 3D Printing |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
business.industry Graphene Mechanical Engineering Surface plasmon Surface Plasmons Optical communication Physics::Optics Bioengineering Heterojunction General Chemistry Dielectric Electric Field-control Condensed Matter Physics Optical switch law.invention Physics [Science] law Electric field Physics::Atomic and Molecular Clusters Optoelectronics General Materials Science business Plasmon |
| Zdroj: | Nano Letters. 20:8305-8311 |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/acs.nanolett.0c03471 |
| Popis: | Precise control of light is indispensable to modern optical communication devices especially as the size of such devices approaches the subwavelength scale. Plasmonic devices are suitable for the development of these optical devices due to the extreme field confinement and its ability to be controlled by tuning the carrier density at the metal/dielectric interface. Here, an electro-ionic controlled plasmonic device consisting of Au/graphene/ion-gel is demonstrated as an optical switch, where an external electric field modulates the real part of the electrical conductivity. The graphene layer enhances charge penetration and charge separation at the Au/graphene interface resulting in an increased photoinduced voltage. The ion-gel immobilized on the Au/graphene further enables the electrical tunability of plasmons which modulates the intensity of the reflected laser light. This work paves the way for developing novel plasmonic electro-optic switches for potential applications such as integrated optical devices. Ministry of Education (MOE) National Research Foundation (NRF) J.Y.P. acknowledges NTU for the Research Student Scholarship and SC3DP which is supported by the National Research Foundation, Prime Minister’s Office, Singapore under its Medium-Sized Centre funding scheme. This work was supported in part by the Ministry of Education (MOE), Singapore - Academic Research Funding (AcRF) Tier 1 Grant RG192/17. R.M. and R.S.R. acknowledge Grants MOE2017- T2-2-129 and MOE2019-T2-1-058. M.B. acknowledges NTU for the NAP-SUG grant. |
| Databáze: | OpenAIRE |
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