Vanadium Dioxide-Based Terahertz Metamaterial Devices Switchable between Transmission and Absorption

Jiang, Haoqing; Wang, Yue; Cui, Zijian; Zhu, Yongqiang; Zhang, Kuang

doi:10.3390/mi13050715

Cited by 22 publications

(5 citation statements)

References 44 publications

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“…The permittivity of VO 2 is dependent on its thermal excitation. The permittivity of 𝑉𝑉𝑆𝑆 2 , both its real and imaginary components, are given by equations (4-6) [33], [34], [35].…”

Section: Design Of the Proposed Absorbermentioning

confidence: 99%

VO₂-Graphene Ultrathin Films: Enabling Wideband Switchable and Tunable THz Absorption

Upender,

Harsha Vardhini,

Kumba

et al. 2024

IEEE Access

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This paper presents a groundbreaking advancement in terahertz (THz) technology through the introduction of a novel ultrathin absorber. Composed of vanadium dioxide (VO 2 ) and graphene, this absorber offers a non-metallic solution for wideband absorption, covering an impressive frequency range from 1.198 THz to 8.752 THz (7.554 THz). Our absorber exhibits exceptional tunable and switchable performance, a significant achievement considering the challenge of achieving frequency tunability across broadband absorption ranges, which was the primary focus of our research endeavor. Furthermore, our proposed absorber demonstrates remarkable characteristics, achieving up to 80% absorption even at high incidence angles of up to 80 o . Additionally, the absorber enhances Shielding Effectiveness in electromagnetic interference (EMI) shields and stealth systems, further highlighting its versatility and potential impact in various applications.INDEX TERMS Absorber, graphene, switchable, tunable, VO 2 , Wideband.

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Section: Design Of the Proposed Absorbermentioning

confidence: 99%

VO₂-Graphene Ultrathin Films: Enabling Wideband Switchable and Tunable THz Absorption

Upender,

Harsha Vardhini,

Kumba

et al. 2024

IEEE Access

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“…For materials with a metal component volume fraction greater than 20%, we utilize Bruggeman effective medium theory to analyze the phase transition process [27,28]. Its dielectric constant is represented as:…”

Section: ( ) W S =mentioning

confidence: 99%

Temperature-controlled tunable metamaterial absorber based on vanadium dioxide with ‘switch’ functionality

Zhu,

Pan,

Tang

2024

Phys. Scr.

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A THz wave modulator, utilizing temperature-controlled phase change materials, is proposed to address the limitation of absorbers' inability to adjust to external environments. This modulator enables the switch function of metamaterial absorbers, comprising a gold reflector layer, a silicon dioxide depletion layer, and a vanadium dioxide pattern layer. Simulations via finite element method reveal two nearly perfect absorption peaks, up to 99.99%. As temperature rises, absorption rates increase, stabilizing gradually after vanadium dioxide transitions from insulating to metallic phase. With a modulation depth of 98.49%, the absorber achieves adjustability. It enables polarization-independent absorption of electromagnetic waves, exhibiting strong absorption at incident angles from 0° to 50° for TE and TM waves. Leveraging vanadium dioxide's phase change characteristics, the absorber can switch between ON and OFF states based on temperature changes, promising potential applications in light modulation and THz absorbers.

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“…They can only achieve a single function and do not have adjustable characteristics, which greatly limits the scalability and practical application of metamaterial. The VO 2 based THz metamaterial device is switchable between transmitter and absorber (Li et al, 2019;Jiang et al, 2022).…”

Section: Vanadium Dioxide For Metasurfaces and Metamaterialsmentioning

confidence: 99%

Review of the VO2 smart material applications with emphasis on its use for spacecraft thermal control

et al. 2022

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It is surprising to see the wide range and versatile potential of applications of the VO2, due to its transition from a semiconductor phase at low temperature, to a metallic state at high temperature. Although this transition’s atomic mechanism is not yet well understood, the tuneability is very reproducible experimentally and can be monitored by various triggering schemes, not only by heating/cooling but also by applying a voltage, pressure, or high power single fast photonic pulse. Many of the recent applications use not only the low-temperature phase and the high-temperature phase, but also the transition slope to monitor a specific parameter. The paper starts with a summary of the VO2 thin film deposition methods and a table presenting its recent proposed applications, some of which our team had worked on. Then the development characterization and application of the VO2 as a smart thermal radiator is provided along with the recent progress. The experimental results of the emissivity were measured at low temperature and high temperature, as well as during the transition in vacuum based on the thermal power balance. These measurements were compared with those deduced from an average of Infrared Reflectance (2–30 µm) weighed with the blackbody reflection spectrum. The roadmap is to try alternatives of the multilayers in order to increase the emissivity tuneability, increase the device dimensions, have an easier application on space surfaces, while lowering cost.

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Vanadium Dioxide-Based Terahertz Metamaterial Devices Switchable between Transmission and Absorption

Cited by 22 publications

References 44 publications

VO₂-Graphene Ultrathin Films: Enabling Wideband Switchable and Tunable THz Absorption

VO₂-Graphene Ultrathin Films: Enabling Wideband Switchable and Tunable THz Absorption

Temperature-controlled tunable metamaterial absorber based on vanadium dioxide with ‘switch’ functionality

Review of the VO2 smart material applications with emphasis on its use for spacecraft thermal control

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Vanadium Dioxide-Based Terahertz Metamaterial Devices Switchable between Transmission and Absorption

Cited by 22 publications

References 44 publications

VO2-Graphene Ultrathin Films: Enabling Wideband Switchable and Tunable THz Absorption

VO2-Graphene Ultrathin Films: Enabling Wideband Switchable and Tunable THz Absorption

Temperature-controlled tunable metamaterial absorber based on vanadium dioxide with ‘switch’ functionality

Review of the VO2 smart material applications with emphasis on its use for spacecraft thermal control

Contact Info

Product

Resources

About

VO₂-Graphene Ultrathin Films: Enabling Wideband Switchable and Tunable THz Absorption

VO₂-Graphene Ultrathin Films: Enabling Wideband Switchable and Tunable THz Absorption