Abstract
Traditional metamaterial-based sensors acquire sensing information mainly by measuring the change of amplitude or frequency caused by the environmental medium. However, this sensing method is not suitable for measuring samples with a large range of stationary spectral lines, such as jade carving materials. In this paper, we design and apply a metamaterial sensor with all-dielectric structure and obtain a smooth transmission line in the operating frequency range of 6-40THz. The transmission properties of the metamaterial are more sensitive to the thickness of SU-8 and less sensitive to the thickness of SiO2. The metamaterial samples were used to measure the effect of thickness and type on the thermal resonance properties (thermal resonance current, thermal conductivity, thermal resistance) of jade carving materials. When the thickness is increased from 1.0mm to 1.9mm, the thermal conductivity of the jade carved sample is weakened, including: the amplitude of the thermal response current and the thermal conductivity coefficient are reduced, and the thermal resistance is significantly increased. These results indicate that the thermal resonance properties of jade samples can be controlled by optimizing the thickness. The thermal resonance properties of four Jade carving samples (Jadeite, Turquoise, Color Jade, and Yellow stone) were measured and compared in detail. Among them, the heat transfer coefficient of Jade carving sample Color Jade is the largest, while the heat transfer coefficient of jade carving sample Turquoise is the smallest. These results indicate that the mineral composition and internal structure of jade carving samples are important factors in determining thermal resonance properties.