Abstract
In this paper, a tunable dielectric metamaterial absorber with temperature-based vanadium dioxide (VO2) is proposed. In contrast to previous studies, both the metal phase of VO2 and the semiconductor phase are applied to manipulate the Mie resonant modes in the dielectric cubes. By embedding VO2 in the main resonant structure, the control over Mie resonant modes in dielectric metamaterials is realized. Each resonant mode is analyzed through field distribution and explains why the phase switch of VO2 could affect the absorbance spectrum. This use of tunable materials could create another new methodology for the manipulation of the Mie resonance-based dielectric cubes and make them closer in essence to isotropic metamaterials.
Highlights
The study of electromagnetic waves began in the late 1800s
The study of VO2 is mainly focused on two areas: the first design idea is changing the electrical length by exploiting the ultra-large change of the refractive index in VO2 between the semiconductor and the metallic states [21,22,23], and the second design idea is changing the transverse electric and transverse magnetic pass with different phases [24,25]
Mode, efficiency the VO2 phase switchingfrom led to a resonant frequency which shifted from 15.79 GHz the GHz, second resonant efficiency frequencywas of enhanced the semiconductor-phase dielectric absorber, toAt16.61 andmain the absorbance from 27.3% to 68.2%
Summary
The study of electromagnetic waves began in the late 1800s. Over the course of a century’s research, the primary goal modern electromagnetic wave research has been to achieve full control of it, including amplitude control, phase control, and wave impendence control [1,2,3,4,5]. The study of VO2 is mainly focused on two areas: the first design idea is changing the electrical length by exploiting the ultra-large change of the refractive index in VO2 between the semiconductor and the metallic states [21,22,23], and the second design idea is changing the transverse electric and transverse magnetic pass with different phases [24,25]. These two ideas are still far from achieving full control over the electromagnetic wave.
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