“…[ 1 ] PCs are periodic arrangements of macroscopic dielectric materials that provide photonic bandgap (PBG) characteristics besides various dispersion anomalies leading to super‐prism, negative refraction, slow light, and self‐collimation (SC) phenomena. [ 2–4 ] So far, interesting and highly efficient devices based on PCs have been reported in sensing, imaging, cloaking and invisibility, and energy harvesting. [ 5–8 ] One of the major fields of applications is devoted to sensor design by PCs and diverse sensors have been reported for temperature, pressure, pH, humidity, and refractive index (RI) which find potential applications in healthcare, automation, defense, security, food quality control, and environment.…”