Journal: Nanoscale Advances

Article Title: Photonic band structure calculation of 3D-finite nanostructured supercrystals †

doi: 10.1039/d2na00538g

Figure Lengend Snippet: Approaches to calculate the properties of photonic crystals, i.e. , infinite lattice for band structure calculations, effective medium theory for optical properties like reflectance, and proposed FDTD simulation for finite supercrystals.

Article Snippet: In order to calculate the optical properties of the supercrystals, we use the finite-difference time-domain (FDTD) method from Ansys-Lumerical.

Techniques:

Journal: Nanoscale Advances

Article Title: Photonic band structure calculation of 3D-finite nanostructured supercrystals †

doi: 10.1039/d2na00538g

Figure Lengend Snippet: Reflectance at the X point ( k = k X , left panels) with the FPMs indicated by red markers (the red arrow in the inset indicates the incident wavevector orientation relative to the supercrystal). Dispersion relation (right panels) of Au-NPs supercrystals with a lattice parameter of 100 nm. (a and b) Cubic, (c and d) rhombic dodecahedral, and (e and f) spherical habits. In the dispersion relations are included the light dispersion in water (cyan solid line), dispersion relation calculated with FDTD of a slab with effective refractive index of the supercrystal (white dashed line), and dispersion relation of the light in the effective medium (blue dashed line) with the FPMs obtained from the reflectance spectrum and applying the resonant condition of a Fabry-Pérot cavity, to find the k value, k N = ω n Re[ N eff ( ω )]/ c (magenta crosses).

Article Snippet: In order to calculate the optical properties of the supercrystals, we use the finite-difference time-domain (FDTD) method from Ansys-Lumerical.

Techniques: Dispersion, Refractive Index