A tunable hybrid metamaterial absorber based on vanadium oxide films

Wen, Qiye; Zhang, Huaiwu; Yang, Qinghui; Chen, Zhi; Long, Yang; Jing, Yulan; Lin, Yuan; Zhang, Peixin

doi:10.1088/0022-3727/45/23/235106

Cited by 149 publications

(62 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This semiconductor-to-metal transition (SMT) takes place when a thermal, electrical, magnetic or optical stimulus is applied and it can occur at ultrafast timescales (~100 fs) [12][13][14]. Recently, considerable efforts have focused on fabricating frequency tunable active metamaterials exhibiting narrow-band operation for a given portion of the electromagnetic spectrum, including microwave, THz and optical frequencies, by tuning the electrical and magnetic modes of SRRs using the phase changing properties of VO 2 [15][16][17]. In this paper, we demonstrate hybrid metamaterial devices designed for multi-band THz frequencies by fabricating double SRR arrays on VO 2 films by a conventional lift off process.…”

Section: Introductionmentioning

confidence: 99%

Active terahertz metamaterials based on the phase transition of VO2 thin films

et al. 2015

View full text Add to dashboard Cite

Vanadium dioxide (VO 2 ) thin films were prepared on single crystal sapphire substrates by pulsed laser deposition. VO 2 films exhibited a significant resistivity drop (N 10 4 Ω-cm) and large optical transmittance change (N 60%) in the near-infrared region across their semiconductor-to-metal transition. Hybrid metamaterial devices designed for the THz frequency regime were fabricated by combining double split-ring resonators (SRRs) with phase changing VO 2 films. By changing the conductivity of VO 2 via temperature, the behavior of the SRR gap was adjusted from capacitive to resistive in order to modulate the THz beam transmission at their resonance frequencies. A modulation efficiency greater than 50% was achieved at the magnetic resonance frequencies (0.3 THz and 0.7 THz) in these hybrid SRR-VO 2 metamaterial devices.Published by Elsevier B.V.

show abstract

Section: Introductionmentioning

confidence: 99%

Active terahertz metamaterials based on the phase transition of VO2 thin films

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Most of these tuning approaches utilizes the change in material properties of the structural materials or surrounding medium. The various means of external control such as optical [12], electrical [13], mechanical [14], thermal [15], or magnetic [16] have been reported so far. However these tuning methods usually involve exotic materials, and so have limited response with non-linear characteristics.…”

Section: Introductionmentioning

confidence: 99%

MEMS switchable infrared metamaterial absorber

Pitchappa

Qian

et al. 2015

SPIE Proceedings

View full text Add to dashboard Cite

We experimentally demonstrate a switchable metamaterial absorber for infrared spectral region using MEMS technology. In order to achieve active tunability; air gap is introduced as the part of dielectric spacer layer and is electrostatically actuated. As the air gap is decreased, the peak absorption wavelength will blue shift accordingly. The tuning range is approximately 700 nm for 300 nm air gap change. Complementary cross is used as the metamaterial unit cell pattern. Owing to the π/2 rotational symmetry of the metamaterial unit cell geometry and out of plane actuation direction of the metamaterial layer, the resultant absorption retains the polarization insensitive characteristics at different actuation states. Additionally high temperature stable materials such as, molybdenum and silicon-di-oxide are used as structural materials for potential use in rugged applications.

show abstract

“…22,23 Tunable metamaterial absorbers in the microwave 24 and THz regimes 25 were designed by using VO 2 film as the ground plane to modulate the impedance match conditions for splitring resonators (SRRs). Dicken et al 26 reported a metamaterial with tunable resonance frequency in the near-infrared by depositing SRRs on a continuous VO 2 film, which modulates surface plasmon at different phases.…”

mentioning

confidence: 99%