The absorption of electromagnetic waves has always attracted a large interest because of its cross-the-board nature that spans from microwave to optical frequencies in both linear and nonlinear regimes. At the same time, the experimental isolation of bi-dimensional (2D) materials has recently unveiled how single layers might also be very attractive because of their unprecedented optical and absorption properties. In particular, graphene, a 2D version of graphite, exhibits a remarkably high absorption value (∼2.3%) in the visible range [1] when compared to metals or dielectric materials. In this paper, we will review and illustrate the quest for the enhanced absorption in photonic nanostructures that incorporate monolayer and multilayer graphene sheets emphasizing the difference in terms of configurations and strategies proposed in literature. Then, we will detail the optical performance of graphene-based one-dimensional (1D) gratings that support guided mode resonances showing how it is possible to tune theoretically and experimentally their total absorption ranging from 2.3% to perfect absorption by means of metallic and dielectric reflectors or engineered super cells
Graphene-based optical absorbers / Grande, Marco; Vincenti, M. A.; Stomeo, T.; Bianco, G. V.; De Ceglia, D.; Akozbek, N.; Petruzzelli, Vincenzo; Bruno, G.; De Vittorio, M.; Scalora, M.; D'Orazio, Antonella (INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS). - In: 17th International Conference on Transparent Optical Networks (ICTON) : 5-9 July 2015, Budapest, HungaryELETTRONICO. - Piscataway, NJ : IEEE Computer Society, 2015. - ISBN 978-1-4673-7880-2. [10.1109/ICTON.2015.7193344]
Graphene-based optical absorbers
GRANDE, Marco;PETRUZZELLI, Vincenzo;D'ORAZIO, Antonella
2015-01-01
Abstract
The absorption of electromagnetic waves has always attracted a large interest because of its cross-the-board nature that spans from microwave to optical frequencies in both linear and nonlinear regimes. At the same time, the experimental isolation of bi-dimensional (2D) materials has recently unveiled how single layers might also be very attractive because of their unprecedented optical and absorption properties. In particular, graphene, a 2D version of graphite, exhibits a remarkably high absorption value (∼2.3%) in the visible range [1] when compared to metals or dielectric materials. In this paper, we will review and illustrate the quest for the enhanced absorption in photonic nanostructures that incorporate monolayer and multilayer graphene sheets emphasizing the difference in terms of configurations and strategies proposed in literature. Then, we will detail the optical performance of graphene-based one-dimensional (1D) gratings that support guided mode resonances showing how it is possible to tune theoretically and experimentally their total absorption ranging from 2.3% to perfect absorption by means of metallic and dielectric reflectors or engineered super cellsI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
