Multiple resonant absorber with prism-incorporated graphene and one-dimensional photonic crystals in the visible and near-infrared spectral range

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].…”

Implementation of Atomically Thick Graphene and Its Derivatives in Electromagnetic Absorbers

“…Finally, there are also quarter-wavelength absorbers based on dielectric/graphene structure operating from THz to optical frequencies under wide absorption angle [72][73][74][75][76][77]. Unlike the Salisbury, Jaumann and Dällenbach absorbers that require a metallic ground, the dielectric/graphene absorbers utilize one or more kinds of dielectrics as well as graphene to achieve EM absorption, as shown in Figure 5a-c. Slightly different from the absorbers with a metallic ground, the EM wave transmittance (T) has to be considered in these devices and the absorption (A) is calculated with Equation 7.…”

“…Strong wave absorption is achieved when the transmittance is minimized and Fabry-Perot resonance occurs. The absorption performance of dielectric/graphene absorbers can also be tuned by varying the chemical potential of graphene [75][76][77]. No extra metallic electrodes are required in these devices as the graphene layers act as optical transparent electrodes for self-biasing, as shown in Figure 5b,c.…”

Graphene-Based Perfect Absorption Structures in the Visible to Terahertz Band and Their Optoelectronics Applications

“…After that, many graphene-based perfect absorption structures in the visible and near-IR band were proposed by utilizing guided resonances in subwavelength periodic structures [49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66]. Meanwhile, perfect absorption in graphene can be also achieved by prism coupling [67,68], by using aperiodic multilayer microstructures [69] or by employing coherent illumination [70,71].…”

“…In the visible and near-IR band, graphene can hardly support plasmons due to the limits of doping or gating level, and the absorption of graphene was normally enhanced by coupling graphene with metallic or dielectric resonant structures. In this band region, graphene-based perfect absorption has been demonstrated by utilizing localized surface plasmon resonances of metals [32,33,34,35,36,37,38,39,40,41,42,43], Fabry–Pérot cavity resonances [44,45], photonic crystal cavity mode [46], guided mode resonances [47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66], or by using prism coupling [67,68], aperiodic multilayer microstructures [69] and coherent illumination [70,71].…”