Tunable wide-angle perfect absorber based on black phosphorous-dielectric-metallic hybrid architecture

Triple-Band Anisotropic Perfect Absorbers Based on α-Phase MoO3 Metamaterials in Visible Frequencies

“…n , k , and d are the effective refractive index, the wave vector, and the thickness of the designed structure, separately. Furthermore, the dielectric layer is assumed to be SiO 2 with a refractive index of 1.45, and the permittivity of silver is obtained from Drude mode [ 35 ]: ε m ( ω ) = ε ∞ − ω p 2 /( ω 2 + iωγ ), where ω is the angular frequency, the plasma frequency is ε p = 1.39 × 10 16 rad/s, the scattering rate is γ = 2.7 × 10 13 rad/s, and the high-frequency constant is ε ∞ = 3.4.…”

“…n, k, and d are the effective refractive index, the wave vector, and the thickness of the designed structure, separately. Furthermore, the dielectric layer is assumed to be SiO 2 with a refractive index of 1.45, and the permittivity of silver is obtained from Drude mode [35]:…”

“…For example, Luo et al theoretically proposed a tunable narrowband absorber based on graphene film and realized an ultra-narrowband perfect absorption peak [ 33 ]. Zhu et al theoretically proposed a tunable ultra-broadband and wide-angle perfect absorber based on stacked monolayer black phosphorus nanoribbons and black phosphorus–dielectric–metallic hybrid architecture [ 34 , 35 ], respectively. Sang et al presented a dual-band absorber based on monolayer molybdenum disulfide (MoS 2 ) [ 36 ].…”

Highly sensitive plasmonic sensor based on eccentric-core photonic crystal fibers

“…The reason for this phenomenon is that as the eccentricity decreased, the coupling coefficient between the first-order SPP mode and the core mode decreased, and the coupling coefficient between the higher-order SPP mode and the core mode increased. 48 1.232 mm and its sensitivity to eccentricity increased from 43.85 nm mm À1 to 91.28 nm mm À1 due to the decrease in eccentricity leading to an increase in the distance between the gold film and the core. In Fig.…”

Active thermally tunable and highly sensitive terahertz smart windows based on the combination of a metamaterial and phase change material

“…In fact, the dielectric properties of the metamaterial can be modulated by its electric field response, which is one of the most important parameters for optimising the geometry. 49,50 A detailed discussion of the impact of the structure's geometric parameters on TSW behaviour will be given later.…”