Photonics based on 2D materials
15:15 : Graphene Nano-roads for Nanoscale Particle Transport
Mohammad Danesh (1),Zhengtong Liu (2),Cheng-Wei Qiu (1)
(1)National University of Singapore (Singapore) , (2)Institute of High Performance Computing (Singapore) The capability to accurately control the position of nanoparticles is of great interest in the nano-sciences. However, controlling the exact position of sub 10nm particles can be particularly challenging. Here we propose a low power method to overcome this challenge by utilizing the tunable dirac plasmons in a nanostructured graphene nanoroad. In our nanoroad we produce an electrically tunable optical potential and carefully study the nanoparticle transport using langevin dynamics and also consider the plasmonic heating effects.
15:30 : Perfect extinction of millimeter waves through a single atomic layer
Hyeong-Ryeol Park (1),Seon Namgung (1),Xiaoshu Chen (1),Nathan Lindquist (2),Vincenzo Giannini (3),Yan Francescato (3),Stefan Maier (3),Sang-Hyun Oh (1)
(1)University of Minnesota (USA) , (2)Bethel University (USA) , (3)Imperial College London (United Kingdom) We experimentally demonstrate 99 percent extinction of millimeter wave transmission when single layer graphene covers the openings of 2-nm-wide apertures through a metal film. By resonantly coupling millimeter waves with annular nanogaps, the extremely localized fields lead to the nearly-perfect extinction and strong absorption in SLG. Furthermore, by integrating these ionic gel, enhanced intraband absorption in the graphene leads to 80 percent modulation of millimeter waves with an operational voltage as low as 1.5V.
15:45 : Distortion of Surface Plasmon Polariton Propagation on Graphene due to Chemical Potential Variation
Stamatios Amanatiadis, Nikolaos Kantartzis
Aristotle University of Thessaloniki (Greece) The variation of graphene's chemical potential owing to surface plasmon polariton excitation and the influence of the former on their propagation properties is examined in this paper. Although the chemical potential is controlled though a constant electric field bias, the excitation of the highly confined surface wave is capable of affecting the chemical potential, thus disrupting the wave's natural propagation. Numerical results, extracted by means of an accurate finite-difference time-domain scheme, validate this interesting convention.
16:00 : Fiber-to-chip meta-grating couplers
Kristjan Leosson (1),J. P. B. Mueller (2),Federico Capasso (2)
(1)University of Iceland (Iceland) , (2)Harvard University (USA) We analyze coupling of light to planar dielectric waveguides using polarization-selective meta-grating couplers. The meta-grating couplers are based on metal nanoantenna arrays, arranged in a fishbone pattern. High index contrast waveguide platforms like TiO2/SiO2 and silicon-on-insulator are considered.