Analysis and detection of women's reproductive hormones using a bistable and reconfigurable 1D annular photonic crystal composed of the GeSbTe phase-change material.

In this study, the reconfigurable biosensing capabilities of the one-dimensional annular photonic structure, (AB)CDC(AB), was examined theoretically. The proposed structure was made of concentric cylindrical layers of periodically modulated refractive indices, which were restricted in one direction only. Germanium antimony telluride (GST), which belongs to the class of phase-change materials (PCMs), was used in the fabrication of the proposed biosensing design.