Thermal radiation in one-dimensional photonic quasicrystals with graphene

Effects of graphene on light transmission spectra in Dodecanacci photonic quasicrystals

“…We could observe a scaling behavior with respect to the number of generations n of the Dodecanacci sequence, for different reduced frequency values. This scaling property corresponds to a self-similar behavior of the spectrum, which is a qualitative evidence of a fractal spectrum, a result that is analogous to the one previously found for the Octonacci sequence [18]. When we consider graphene between the AjB and BjA interfaces, for normal incidence (θ ¼ 0 ∘ ), we note the breakdown of the mirror-like symmetry around the reduced frequency ω=ω 0 ¼ 1.…”

“…2, for the same generations of Dodecanacci sequence, i.e., (e) fifth generation, (f) zoom of fifth generation for the reduced range of frequency 0:99 � ω=ω 0 � 1:05, (g) and (h) correspond to sixth and seventh generations for 1 � ω= ω 0 � 1:04 and 1:005 � ω=ω 0 � 1:035, respectively. The presence of graphene at the interfaces between different media causes the loss of the mirror symmetry on the transmission spectra around the mid-gap reduced frequency ω=ω 0 ¼ 1, although the quarter-wavelength condition was considered, as it was deeply discussed on previous works [14,18,19]. The central frequency has now a new value of reduced frequency around 1.02.…”

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].…”

Plasmon-polariton fractal spectra in quasiperiodic photonic crystals with graphene

“…We can note two well-defined regions for the bulk plasmon-polariton spectrum, for frequencies above and below ω ≈ 1.34 THz. For ω below about 1.34 THz and for k x d A ≈ 0 there is a large gap, sometimes called the graphene-induced gap [44,45], which extends out to the DLL of SiO 2 . For k x d A values to the right of the DLL we have many bulk bands which start at the origin and eventually merge into three narrow bands that will join in a straight line with a constant group velocity for high values of k x d A (not shown here).…”