Abstract
Super-resolution optical imaging is a consistent research hotspot for promoting studies in nanotechnology and biotechnology due to its capability of overcoming the diffraction limit, which is an intrinsic obstacle in pursuing higher resolution for conventional microscopy techniques. In the past few decades, a great number of techniques in this research domain have been theoretically proposed and experimentally demonstrated. Graphene, a special two-dimensional material, has become the most meritorious candidate and attracted incredible attention in high-resolution imaging domain due to its distinctive properties. In this article, the working principle of graphene-assisted imaging devices is summarized, and recent advances of super-resolution optical imaging based on graphene are reviewed for both near-field and far-field applications.
Highlights
Graphene is a two-dimensional material made up of sp2 -hybridized carbon arranged in a honeycomb crystal lattice with one-atom thickness [1]
This review presents a comprehensive summary of the research on super-resolution optical imaging based on graphene, including both experimental and theoretical studies
In 2018, Liu and co-workers introduced a graphene sheet as an ultrathin nonlinear negative reflection lens for achieving super-resolution imaging based on four wave mixing (FWM) process in the terahertz regime [73] thanks to the fact that graphene possesses strong nonlinear electromagnetic response
Summary
Graphene is a two-dimensional material made up of sp2 -hybridized carbon arranged in a honeycomb crystal lattice with one-atom thickness [1]. Graphene plasmons show high confinement and relatively low loss with more flexible features All these unique features have made graphene a promising candidate for a variety of crucial applications [24,25], such as super-resolution imaging and optical biosensing [26,27,28]. The resolution of traditional fluorescence microscopy is fundamentally limited to λ⁄2NA (λ is the wavelength of the incident light and NA is the numerical aperture) This intrinsic limit, known as diffraction limit [29,30], has become the main obstacle to high-resolution optical imaging. It becomes more difficult to disperse and composite with graphene These controllable properties will affect the device performance of graphene-assisted imaging components when graphene is integrated into a super-resolution imaging system. The article first introduces the principle of super-resolution imaging with graphene and the following sections will focus on different imaging methods with graphene found in the bibliography and categorized by application regions (near field and far field)
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call