Abstract
In this article, the plasmonic Talbot effect supported by a graphene monolayer is investigated theoretically when surface plasmon polaritons (SPPs) are excited on the graphene. The Talbot effect distance is studied by varying the chemical potential, wavelength and the period of grating. The Talbot distance increases with the period in a parabolic way, and exhibits the opposite trends with respect to the chemical potential and wavelength. Moreover, the full width at half maximum (FWHM) of the Talbot image is recorded as a function of chemical potential and the wavelength. This study provides a new approach for sub-wavelength scale imaging and extends the applications of Talbot effect as well as graphene-based plasmonic devices.
Highlights
The Talbot effect [1], a superposition phenomenon of multi-slit interference and single-slit diffraction, was interpreted by L.Rayleigh according to the Fresnel diffraction theory [2]
The plasmonic Talbot effect occurs when surface plasmon waves are incident which is produced by the powerful interaction between the free electron oscillations and the electromagnetic field at the metal–dielectric interface
The plasmonic Talbot effect has been achieved in a sheet of graphene by using
Summary
The Talbot effect [1], a superposition phenomenon of multi-slit interference and single-slit diffraction, was interpreted by L.Rayleigh according to the Fresnel diffraction theory [2]. Dennis et al have reported the plasmonic Talbot effect on metals [5]. The plasmonic Talbot effect occurs when surface plasmon waves are incident which is produced by the powerful interaction between the free electron oscillations and the electromagnetic field at the metal–dielectric interface. As new branch of self-imaging effect, the plasmonic Talbot effect breaks the diffraction limit [6,7,8,9,10,11] due to the excellent electromagnetic field confinement ability of plasmon [12,13,14,15,16]. All the drawbacks limit the implication of the conventional metal-based plasmonic Talbot effect
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