Magnetically tunable enhanced absorption of circularly polarized light in graphene-based 1D photonic crystals

Abstract

We theoretically investigate the magnetic-field-induced terahertz absorption enhancement of a graphene-based one-dimensional photonic crystal using the 4×4 transfer matrix method for the circular polarization of light. The results show that the magnetically tunable absorption of the structure depends on the circular polarization state, magnetic circular dichroism, and, interestingly, absorption behaviors of right-handed and left-handed circularly polarized light interchange by changing the direction of the magnetic field. These properties can be used to design the circular-polarization-based sensors.

On the enhancement of light absorption in vanadium dioxide/1D photonic crystal composite nanostructures

“…Moreover, preparing hybrid structures with PCs can also lead to the enhancement of absorption because the optical properties of these hybrids can radically differ from those of the individual elements. For instance, hybrid structures based on graphene and PCs as well as photonic quasi crystals have been intensively studied in order to achieve effective optical absorption by the structures [13][14][15][16][17][18][19][20][21][22][23][24][25].…”

Terahertz tunable photonic crystal optical filter containing graphene and nonlinear electro-optic polymer

“…In other cases, taking advantage of the electro-optical (EO) features of materials such as Li:NbO 3 or liquid crystals, the electrical tuning of the optical features of PCs is suggested [13,16]. Magnetic tuning is the other proposed method, in which an external magnetic field is utilized to tune the optical characteristics of a PC [17,18]. A few other approaches, such as the use of mechanical strains, have been also proposed [19].…”

“…Other research has focused on controlling the optical features of graphene-based PCs by an external magnetic field. Rashidi et al suggested an external magnetic field for controlling the absorbance of a graphene-based PC [17]. Ardakani et al studied a structure consisting of a graphene layer placed in between two magneto-optical layers that are themselves located between two PCs [18].…”

Graphene-Based Magnetically Tunable Broadband Terahertz Absorber

“…Crucially, this technique is non-contact and free of electrodes, which can effectively reduce the difficulty of manufacturing. Using the SBMF, Rashidi et al investigated the circularly polarized wave absorption performance of a graphene-based 1DPC in the THz region [19]. However, this work was limited to narrowband absorption.…”