Abstract
We investigate the photonic bandgaps in graphene-pair arrays. Graphene sheets are installed in a bulk substrate to form periodical graphene photonic crystal. The compound system approves a photonic band structure as a light impinges on it. Multiple stopbands are induced by changing the incident frequency of light. The stopbands widths and their central frequencies could be modulated through the graphene chemical potential. The number of stopbands decreases with the increase in the spatial period of graphene pairs. Otherwise, two full passbands are realized in the parameter space composed of the incident angle and the light frequency. This investigation has potentials applied in tunable multi-stopbands filters.
Highlights
Bragg gratings, which are formed by modulating the refractive indices of materials or spatial structures of systems periodically, are extensively utilized for optical filters [1,2], fiber lasers [3] and optical reflectors [4,5]
For a transverse magnetic (TM) wave, as it normally impinges on the periodic structures composed of graphene pairs from the left, Figure 2a gives the transmittance versus the frequency of light
Multiple photonic bandgaps and their regulations were investigated in a complex system composed of a bulk dielectric and graphene pairs
Summary
Bragg gratings, which are formed by modulating the refractive indices of materials or spatial structures of systems periodically, are extensively utilized for optical filters [1,2], fiber lasers [3] and optical reflectors [4,5]. A. Bragg grating can be formed by inserting a series of graphene monolayers into a bulk dielectric to form periodic graphene arrays in space. Graphene has unique advantages, as it is utilized for exciting surface plasmon polariton [22,23,24] These unique periodic structures constructed by graphene arrays can be viewed as photonic crystals as well. Photonic crystals based on graphene arrays are formed by arranging a monolayer of graphene periodically in the horizontal direction [25]. The photonic bands in transmission and reflection spectra of light are investigated, and the optical tunabilities of stopbands by the chemical potential graphene are discussed as well. This work could be utilized for multiple stopbands photonic filters
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
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
