Thermochromism Frequency-Selective Emitter for Infrared Stealth Application

Zhao, Yuechao; Fang, Fei

doi:10.1021/acsaelm.1c00277

Cited by 21 publications

(9 citation statements)

References 65 publications

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“…This particular form of emissivity is caused by the asynchronous phase transition temperature of the W-doped VO 2 layer and the VO 2 layer. Similarly, Zhao et al 291 proposed a new metal–dielectric–metal (MIM) structure, as shown in Fig. 31b.…”

Section: Smart Applications Of Element-doped Vo2mentioning

confidence: 99%

Element doping: a marvelous strategy for pioneering the smart applications of VO₂

Xue

Yin

2022

Nanoscale

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Section: Smart Applications Of Element-doped Vo2mentioning

confidence: 99%

Element doping: a marvelous strategy for pioneering the smart applications of VO₂

Xue

Yin

2022

Nanoscale

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“…[ 1 ] However, due to the performance limits of conventional materials, various needs in building energy management, [ 2,3 ] packing technology, [ 4,5 ] safety, [ 6 ] and military applications [ 7 ] cannot be satisfied sufficiently, which leads to developing advanced materials having the engineered properties depending on their missions. [ 8 ] The camouflage platform with metamaterials to manipulate electromagnetic energy efficiently is one of the solutions to satisfy the needs in energy, [ 9,10 ] military, [ 11–15 ] and space applications. [ 16 ] Hence, many researchers have developed several camouflage platforms with metamaterials, [ 17,18 ] such as metal‐dielectric‐metal (MDM) structure, [ 19,20 ] photonic crystal, [ 21 ] multi‐layers, [ 22,23 ] and novel materials [ 24–27 ] to control the electromagnetic energy for breaking the limits of conventional applications.…”

Section: Introductionmentioning

confidence: 99%

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mentioning

confidence: 99%

Flexible Assembled Metamaterials for Infrared and Microwave Camouflage

Lee

Lim

Chang

et al. 2022

Advanced Optical Materials

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camouflage platform with metamaterials to manipulate electromagnetic energy efficiently is one of the solutions to satisfy the needs in energy, [9,10] military, [11][12][13][14][15] and space applications. [16] Hence, many researchers have developed several camouflage platforms with metamaterials, [17,18] such as metal-dielectric-metal (MDM) structure, [19,20] photonic crystal, [21] multilayers, [22,23] and novel materials [24][25][26][27] to control the electromagnetic energy for breaking the limits of conventional applications. [28,29] There are two camouflage mechanisms: reduction in the reflection or the emission from the target against the detector at the specific wavelength. In reducing the reflected wave from the target such as the microwave, [30,31] metamaterials for microwave camouflage match the impedance with the medium and consume the incident wave through the energy dissipation in the structure, inducing the unity of absorptivity. Otherwise, when the detector measures the emitted wave from the target in the infrared (IR) wave, the emissivity (absorptivity) in the detected band should be zero; it means the unity reflectivity on the surface contrary to the metamaterials for microwave camouflage. These different mechanisms make the multispectral camouflage difficult because camouflage materials should satisfy both the zero and the unity absorptivity in the different spectral regimes in the same structure. Furthermore, blocking the signal from the target can induce energy accumulation based on the energy conservation law, [32] meaning that we also need to consider the energy dissipation through the undetected spectrum to prevent the unwanted energy accumulation in the structure. [33] Therefore, there have been several studies on metamaterials for camouflage with a specific property of the unity absorptivity for microwave [30,31,34] or reflectivity for IR wave. [33,[35][36][37] However, only a few studies of the multispectral metamaterials have been conducted [38,39] since they should solve the issue of size difference depending on the target wavelength. In metamaterials, the operating wavelength is proportional to the unit cell size. This requires that they contain various unitcell sizes in the same structure to cover the multispectral wavelength range such as microwave (O ∼ centimeter) and IR wave (O ≈ micrometer), [40] which makes the fabrication difficult. Light, heat, and waves in electromagnetic energy are the foundation for the advancement of human being. Camouflage materials based on metamaterials are used to excel the performance limits by manipulating the electromagnetic energy. However, multispectral camouflage materials with flexibility are difficult to fabricate because required radiative properties in each spectral regime are different and have largely different scales of the unit cell in a single structure. The authors propose flexible assembled metamaterials (FAM) by assembling the flexible infrared (IR) emitter and flexible microwave absorber. The authors adopt the intermediate layer to a...

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“…Vanadium dioxide (VO 2 ) is known as a functional material for smart windows, − infrared stealth, imaging, data storage, memristors, tunable-frequency metamaterials, multifunctional sensors, , etc. It undergoes a reversible metal–insulator transition at ∼68 °C, which can be further lowered to room temperature by doping. − Monoclinic VO 2 (M) is a low-temperature phase, which is a semiconductor and infrared-transparent, whereas high-temperature rutile VO 2 (R) is a metal phase with low near-infrared transition and low infrared radiation.…”

Section: Introductionmentioning

confidence: 99%

“…9−12 In photodetectors, hybridization of ZnO with a second semiconductor, e.g., perovskite, could achieve an ambipolar photoresponse, higher switching ratio, faster response speed, and higher response and detection rate than compared to corresponding monophase devices. 13−16 Vanadium dioxide (VO 2 ) is known as a functional material for smart windows, 17−20 infrared stealth, 21 imaging, 22 data storage, 23 memristors, 24 tunable-frequency metamaterials, 25 multifunctional sensors, 26,27 etc. It undergoes a reversible metal−insulator transition at ∼68 °C, which can be further lowered to room temperature by doping.…”

Section: Introductionmentioning

confidence: 99%

UV–vis–IR Broad Spectral Photodetectors Based on VO₂–ZnO Nanocrystal Films

Zhu

et al. 2022

ACS Omega

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As a narrow band semiconductor at room temperature and a metallic material above ∼68 °C, functional VO2 films are widely investigated for smart windows, whereas their potential for ultraviolet–visible–infrared (UV–vis–IR) broad spectral photodetectors has not been efficiently studied. In this report, photodetectors based on VO2–ZnO nanocrystal composite films were prepared by nanocrystal-mist (NC-mist) deposition. An enhanced photodetection switching ratio was achieved covering the ultraviolet to infrared wavelength. Due to the synergetic effect of nanosize, surface, phase transition, percolation threshold, and the band structure of the heterojunction, the transfer and transport of photogenerated carriers modulate the device performance. This study probes new chances of applying VO2-semiconductor-based nanocomposites for broad spectral photodetectors.

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Thermochromism Frequency-Selective Emitter for Infrared Stealth Application

Cited by 21 publications

References 65 publications

Element doping: a marvelous strategy for pioneering the smart applications of VO₂

Element doping: a marvelous strategy for pioneering the smart applications of VO₂

Flexible Assembled Metamaterials for Infrared and Microwave Camouflage

UV–vis–IR Broad Spectral Photodetectors Based on VO₂–ZnO Nanocrystal Films

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Thermochromism Frequency-Selective Emitter for Infrared Stealth Application

Cited by 21 publications

References 65 publications

Element doping: a marvelous strategy for pioneering the smart applications of VO2

Element doping: a marvelous strategy for pioneering the smart applications of VO2

Flexible Assembled Metamaterials for Infrared and Microwave Camouflage

UV–vis–IR Broad Spectral Photodetectors Based on VO2–ZnO Nanocrystal Films

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Element doping: a marvelous strategy for pioneering the smart applications of VO₂

Element doping: a marvelous strategy for pioneering the smart applications of VO₂

UV–vis–IR Broad Spectral Photodetectors Based on VO₂–ZnO Nanocrystal Films