High-Resolution Temperature Sensor Based on Resonance Excitation of Tamm Plasmon Polaritons: Graphene Plasmon Polariton Hybrid Mode

A theoretical demonstration of a high-quality-factor photonic crystal (PC) temperature sensor in the near-infrared frequency domain is presented. The sensor is based on coupling of Tamm plasmon polaritons (TPPs) existing at the graphene-PC interface and graphene plasmon polaritons (GPPs) existing at the graphene surface. This leads to the appearance of a TPP-GPP hybrid mode in one-dimensional ternary photonic crystals (1D TPC) truncated by a dielectric layer between graphene monolayers. For a transverse magnetic (TM) polarized wave, the excited TPP-GPP hybrid modes are localized within the range 180-270 THz or 1.11-1.67 mu m. Excellent control over the resonance frequency is established via Kretschmann configuration excitation that covers the temperature range spanning from 1 K to 1500 K with high coupling efficiency and high quality factor (QF) of the order of 10(5) . It has been proved that the QF is strongly governed by temperature. The design parameters of the sensor are optimized so that temperature sensitivity of 5.75 fm/K is achieved, with an excellent figure of merit of the order of 10(-4) K-1 and high detection accuracy of the order of 10(11) . The proposed sensor exhibits a high temperature detection limit or temperature resolution of 3.915 x 10(-4)K. A comparative analysis of the sensor parameters in the near infrared wavelength is provided, and the wavelengths are resolved at the femtometer length scale with very high QF. [GRAPHICS] .