Excitation of localized graphene plasmons by aperiodic self-assembled arrays of metallic antennas
V. Kaydashev, 1 B. Khlebtsov,2 A. Miakonkikh,3 E. Zhukova,1 S. Zhukov,1 D. Mylnikov1, I. Domaratskiy1 and D. Svintsov1
1Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology (MIPT), Institutskiy Per.9, 141701, Dolgoprudny, Russia
2Institute of Biochemistry and Physiology of Plants and Microorganisms RAS, 13 Entuziastov Ave., 410049, Saratov, Russia
3Valiev Institute of Physics and Technology RAS, 36/1 Nahimovsky Ave., 117218, Moscow, Russia
Abstract
Infrared and terahertz plasmons in two-dimensional materials are commonly excited by metallic or dielectric grating couplers with deep-submicron features fabricated by e-beam lithography. Mass reproduction of such gratings at macroscopic scales is a labor-consuming and expensive technology. Here, we show that localized plasmons in graphene can be generated on macroscopic scales with couplers based on randomly oriented particle-like nanorods in close proximity to graphene layer. We monitor the excitation of graphene plasmons indirectly by tracking the changes in reflection/absorption spectra of Methylene Blue or PMMA molecules deposited on the structure. Hybridization of spectrally broad graphene plasmon and narrow molecular oscillators results in enhanced oscillator strengths and Fano scattering related lines asymmetry in reflection spectra.
Speaker
Vladimir Kaydashev
Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology (MIPT), Institutskiy Per.9, 141701, Dolgoprudny, Russia
Russia
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