2018
DOI: 10.1016/j.optcom.2018.05.085
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A broadband and switchable VO2-based perfect absorber at the THz frequency

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Cited by 141 publications
(45 citation statements)
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“…Meanwhile, during the transition progress, the dielectric constant of VO 2 can change several orders of magnitude at the THz band. To date, some thermally controlled materials are developed to design tunable absorbers [34]- [40]. By respectively stacking layers of VO 2 periodic array, dielectric layer, VO 2 film, Au periodic array, dielectric layer and Au reflective layer, two thermally controlled absorption bands, 0.76 -0.86 THz and 1.12-1.25 THz, are implemented [34].…”
Section: Introductionmentioning
confidence: 99%
“…Meanwhile, during the transition progress, the dielectric constant of VO 2 can change several orders of magnitude at the THz band. To date, some thermally controlled materials are developed to design tunable absorbers [34]- [40]. By respectively stacking layers of VO 2 periodic array, dielectric layer, VO 2 film, Au periodic array, dielectric layer and Au reflective layer, two thermally controlled absorption bands, 0.76 -0.86 THz and 1.12-1.25 THz, are implemented [34].…”
Section: Introductionmentioning
confidence: 99%
“…Recently, special attention has been paid to switchable /tunable metamaterial (MM) absorbers due to their flexibility and fabricability in practical applications . Conventional absorbers operate at frequency‐fixed absorption mode once manufactured unless the structure parameters are altered .…”
Section: Introductionmentioning
confidence: 99%
“…Some feasible methods such as thermal control, electrical control, and optical control have been proposed to realize switchable or tunable absorbers according to respective requirements. Related to these methods, semiconductor materials, graphene, and some phase‐change materials, such as germanium antimony telluride (GST) and vanadium dioxide (VO 2 ), have become important choices for realization of switchable /tunable devices . By incorporating these materials in the resonators, one can regulate the resonance characteristics through adjusting the conductivity of these materials by temperature, bias voltage, or optical power.…”
Section: Introductionmentioning
confidence: 99%
“…Therefore, 68 C is a jump point of the conductivity of VO 2 . VO 2 exhibits metal properties at temperatures equal to or greater than 68 C, and keeps insulating state at temperatures below 68 C, 11 which makes VO 2 widely used in designing the surfaces, 12 the absorbers, 13,14 and the antennas. 15,16 Since the insulator-metal transition of VO 2 , we can describe its physical properties by the conductivity.…”
Section: Introductionmentioning
confidence: 99%