Active thermally tunable and highly sensitive terahertz smart windows based on the combination of a metamaterial and phase change material

Abstract

A terahertz thermally tuned window based on the combination of metamaterial with the phase change material VO2 is proposed. It is composed of a sandwich structure of vanadium oxide films....

Design and performance analysis of a mid-infrared broadband thermally tunable metamaterial absorption device based on the phase-change effect

“…The top layer adopts a windmill-shaped thin film of vanadium dioxide (VO 2 ). The dielectric constant of VO 2 can be characterized using the Drude model, as shown in eqn (1): 27,28 ε ∞ = 12 is the dielectric constant at high frequency, γ = 5.75 × 10 13 rad s −1 is the collision frequency, ω p ( σ ) is the plasma frequency related to conductivity. It is shown in eqn (2), where ω p ( σ 0 ) = 1.4 × 10 15 rad s −1 , σ 0 = 3 × 10 5 S m −1 .…”

Design of Plasmonic Photonic Crystal Fiber for Highly Sensitive Magnetic Field and Temperature Simultaneous Measurement

“…Figure 3 a,b show the optical field distribution of the x-pol core mode and y-pol core mode. The x-polarized core mode (x-pol core mode) and y-pol core mode in the core have different effective refractive indices because the lack of rotational symmetry in the construction of this sensor causes the birefringence effect [ 46 ]. In addition, according to the SPP mode characteristics [ 47 ], different modes with different electrical field distributions have different degrees of excitation on the SPR effect.…”

Highly sensitive plasmonic sensor based on eccentric-core photonic crystal fibers

“…Finally, we tested the concept with two typical sensing types, one in which the sensor was directly in contact with adulterated gasoline to achieve kerosene-concentration detection, and another in which the sensor was coated with a layer of polydimethylsiloxane (PDMS), whose RI is sensitive to the temperature field, to achieve temperature sensing. The plasmonic sensor is expected to be used in aerospace, material analysis, biomedicine, deep-sea exploration, and other scientific fields 25–29 due to its high sensitivity, high FOM, high confidence, and low fabrication process difficulty.…”