Graphene-based ultrathin flat lenses

Xiang Tian Kong, Ammar A. Khan, Piran R. Kidambi, Sunan Deng, Ali K. Yetisen, Bruno Dlubak, Pritesh Hiralal, Yunuen Montelongo, James Bowen, Stéphane Xavier, Kyle Jiang, Gehan A.J. Amaratunga, Stephan Hofmann, Timothy D. Wilkinson, Qing Dai, Haider Butt

Research output: Contribution to journalArticlepeer-review

66 Scopus citations

Abstract

Flat lenses when compared to curved surface lenses have the advantages of being aberration free, and they offer a compact design necessary for a myriad of electro-optical applications. In this paper we present flat and ultrathin lenses based on graphene, the worlds thinnest known material. Monolayers and multilayers of graphene were fabricated into Fresnel zones to produce Fresnel zone plates, which utilize the reflection and transmission properties of graphene for their operation. The working of the lenses and their performance in the visible and terahertz regimes were analyzed computationally. Experimental measurements were also performed to characterize the lens in the visible regime, and a good agreement was obtained with the simulations. This work demonstrates the principle of atom-thick graphene-based lenses, with perspectives for ultracompact integration.

Original languageBritish English
Pages (from-to)200-207
Number of pages8
JournalACS Photonics
Volume2
Issue number2
DOIs
StatePublished - 18 Feb 2015

Keywords

  • Fresnel zone plates
  • graphene
  • thin lenses

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