Journal: Nanoscale Advances

Article Title: A reconfigurable hyperbolic metamaterial perfect absorber †

doi: 10.1039/d0na00787k

Figure Lengend Snippet: (a) Scheme of the reconfigurable phase-change HMM absorber, where the structure is composed of Au–GST225 stacked layers. Both the GST225 and Au films have an identical thickness of 40 nm. The whole HMM absorber sits on a silica substrate. (b) FIB image of the cross-section of the HMM absorber. (c) Real parts of the ε ‖ and ε ⊥ of the HMM absorber extracted from VASE as transiting the GST225 state from amorphous (top panel) to crystalline (bottom panel). (d) The VASE measured (top panel) and FDTD simulated (bottom panel) A ( ω ) of the HMM absorber for the amorphous and crystalline states.

Article Snippet: A commercial FDTD simulation software package (Lumerical Solutions, version 8.15.736) was used to simulate the HMM absorber.

Techniques:

Journal: Nanoscale Advances

Article Title: A reconfigurable hyperbolic metamaterial perfect absorber †

doi: 10.1039/d0na00787k

Figure Lengend Snippet: (a and b) The performance of resonance switching in the HMM absorber: VASE measured (top panels) and FDTD simulated (bottom panels) absorptance spectra for the (a) amorphous and (b) crystalline states. The filling factor is f = 0.5 and the thickness of the constituent layer is T Au = T GST = 20 nm (black lines), 30 nm (blue lines), and 40 nm (cyan lines), respectively. The redshift of the absorptance spectra can be both experimentally and numerically found by changing the GST225 state from amorphous to crystalline. (c) The resonant wavelength is plotted against the thickness of constituent layers for both the amorphous (blue dot) and crystalline (red open circle) phases. (d) A 2D diagram of absorptance against T Au and T GST at a fixed wavelength of λ a = 1180 nm.

Article Snippet: A commercial FDTD simulation software package (Lumerical Solutions, version 8.15.736) was used to simulate the HMM absorber.

Techniques:

Journal: Nanoscale Advances

Article Title: A reconfigurable hyperbolic metamaterial perfect absorber †

doi: 10.1039/d0na00787k

Figure Lengend Snippet: The VASE measurement (left column) and FDTD simulation (right column) of incident angular-dependent absorptance spectra for the phase change HMM absorber on a SiO 2 substrate under the illumination of (a) p- and (b) s-polarized lights for the amorphous state and (c) p- and (d) s-polarized lights for the crystalline state.

Article Snippet: A commercial FDTD simulation software package (Lumerical Solutions, version 8.15.736) was used to simulate the HMM absorber.

Techniques: