Actively controlled super-resolution using graphene-based structure

Bo Han Cheng, Kai Jiun Chang, Yung Chiang Lan, Din Ping Tsai

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

A super-resolution (with λ/50 resolution ability at mid-infrared region) device that consists of a monolayer graphene sandwiched between two dielectric materials with two alternate chemical potentials in graphene (which can be obtained by alternately applying two biased voltages to graphene) is proposed and analyzed. When the subwavelength resolution is achieved, the graphene-based device can be viewed as an effective optical medium with alternate arrangement of positive and negative refractive indices. And the isofrequency dispersion curves of the effective optical medium have the hyperbolic form. Furthermore, the super-resolution at different desired frequencies can be reached by merely changing the chemical potentials of graphene. The proposed devices have potential applications in multi-functional material, real-time subwavelength imaging, and high-density optoelectronic components for using the abnormal diffraction feature.

Original languageEnglish
Pages (from-to)28635-28644
Number of pages10
JournalOptics Express
Volume22
Issue number23
DOIs
Publication statusPublished - 2014 Nov 17

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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