Fig. 1: CQD-based PhC phosphor with a TiO2 2D PhC backbone layer.
From: Structurally engineered colloidal quantum dot phosphor using TiO2 photonic crystal backbone
a Schematic of the 2D PhC phosphor structure, with the schemes for excitation and detection indicated. b–e Photonic band structures calculated for b SiN-W, c SiN-P, d TiO-W, and e TiO-P. The inset in each figure is a schematic of the corresponding PhC phosphor platform. Both the Si3N4 and TiO2 films are assumed to be 60 nm in thickness. f–i Calculated transmittance, reflectance, and absorbance spectra for f SiN-W, g SiN-P, h TiO-W, and i TiO-P. Insets show the calculated absorption enhancement factors for the corresponding PhC phosphor platforms. For direct comparisons, the wavelengths of the Γ-point band-edge modes determined from the band structures in (b–e) are identified. j–l Γ-point band-edge mode profiles (\(\left| E \right| = \sqrt {E_x^2 + E_y^2 + E_z^2}\)) calculated for TiO-P: j Γ1, k Γ2, and l Γ3/Γ4. m–o Γ-point band-edge mode profiles (Hz) calculated for TiO-P: m Γ1, n Γ2, and o Γ3/Γ4. The circles in (j–o) represent the air hole in the PhC unit cell
