Figure 1
From: Hyperuniform disordered terahertz quantum cascade laser
(a) Bidimensional finite element simulations performed with the commercial software Comsol Multiphysics of a hyperuniform disordered pattern with a χ factor = 0.5 arranged in a near hexagonal tile of high refractive index disks merged in a low refractive index matrix, which correspond to the active region and to the Cyclotene polymer substrate, respectively. This structure supports several localized modes. The highest frequency mode on the lower band edge on the PBG is reported together with the corresponding far-field. The mode is identified by the electric-field intensity in the AR, while the circumferential line’s radial deformation is proportional to the far-field intensity. (b) Q-factor for the different modes supported by this structure obtained from the eigenfrequency analysis. The inset reports the calculated structure factor S(
) which is isotropic and presents an inner circle of S(
) identical equal to zero for |k| ≤ kc for some kc.
