We propose an analytical model to study the absorption of a graphene sheet in the microwave range when its sheet resistance is varied. We demonstrate that the maximum achievable for a suspended structure is 50% and it is independent of the frequency in the range of interest. Finally, we propose a microwave absorber based on a Salisbury screen configuration consisting of two opportunely doped graphene sheets separated by a quarter-wavelength dielectric lossless spacer. In particular, we show how it is possible to achieve near-perfect absorption over a wide frequency bandwidth and how this graphene-based absorber is less sensitive to the variation of the graphene sheet resistance. The realization of the microwave absorber with few-layer graphene leads to a fully transparent device in the visible-near infrared range.

Optically transparent graphene-based Salisbury screen microwave absorber

Grande, Marco;D'Orazio, Antonella;Bruno, Giovanni;Vincenti, Maria Antonietta;De Ceglia, Domenico;
2015-01-01

Abstract

We propose an analytical model to study the absorption of a graphene sheet in the microwave range when its sheet resistance is varied. We demonstrate that the maximum achievable for a suspended structure is 50% and it is independent of the frequency in the range of interest. Finally, we propose a microwave absorber based on a Salisbury screen configuration consisting of two opportunely doped graphene sheets separated by a quarter-wavelength dielectric lossless spacer. In particular, we show how it is possible to achieve near-perfect absorption over a wide frequency bandwidth and how this graphene-based absorber is less sensitive to the variation of the graphene sheet resistance. The realization of the microwave absorber with few-layer graphene leads to a fully transparent device in the visible-near infrared range.
2015 IEEE 15th Mediterranean Microwave Symposium (MMS)
978-1-4673-7602-0
IEEE
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/75899
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • Scopus 5
  • ???jsp.display-item.citation.isi??? 0
social impact