BME Frontiers / 2021 / Article / Fig 3

Research Article

Bioresorbable Multilayer Photonic Cavities as Temporary Implants for Tether-Free Measurements of Regional Tissue Temperatures

Figure 3

Optical properties of a bioresorbable multilayer photonic cavity structure and its sensing mechanism. Experimental measurements (a) and simulation results (b) of transmission spectra for a 1.5 μm thick Si membrane at incidence angles between 0° and 32°. Experimental measurements (c) and simulation results (d) of transmission spectra for a SiNx/SiNy multilayer structure at incidence angles between 0° and 32°. (e) Simulation results of a bioresorbable multilayer photonic cavity structure at temperatures between 20°C and 70°C. (f) 3D surface plots of peaks , , and (labeled in (e)) at various temperatures and angle of incident light. (g) Each measurement yields a set of values for peaks , , and . Applying these values to the 3D surface plots (shown in Figure 3(f)) yields intersection curves for peaks , , and , respectively. The point of intersection defines the temperature and angle of incident light.