Dynamic Thermal Emission Control Based on Ultrathin Plasmonic Metamaterials Including Phase‐Changing Material GST (Laser Photonics Rev. 11(5)/2017)

Qu, Yue; Li, Qiang; Du, Kaikai; Cai, Lu; Lu, Jun; Qiu, Min

doi:10.1002/lpor.201770052

Cited by 23 publications

(24 citation statements)

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“…[ 197–199 ] As a conventional approach, gated 2D monolayers (e.g., graphene, [ 200–204 ] semiconducting transition metal dichalcogenide (TMDC) monolayers: [ 205–208 ] MoS 2 , MoSe 2 , WS 2 , WSe 2 , and low‐dimensional materials [ 209,210 ] ) have widely been employed to enhance the functionality of metadevices ranging from IR to THz frequencies. Instead, an active control over the spectral response of optical metasurfaces can be realized via thermally reversible phase‐change materials (PCMs) (e.g., VO 2 , [ 211–214 ] Ge x Sb y Te z , [ 215–220 ] and AgInSbTe [ 221,222 ] ). This concept relies on the active toggling between amorphous and crystalline states of the PCM at specific temperatures, [ 223 ] which enables the development of functional photonic tools across a broad range of frequencies.…”

Section: Active Hybrid Toroidal Metamodulatorsmentioning

confidence: 99%

Toroidal Metaphotonics and Metadevices

Ahmadivand

Gerislioglu

Ahuja

et al. 2020

Laser & Photonics Reviews

105

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Toroidal moments in artificial media have received growing attention and considered as a promising framework for initiating novel approaches to manage intrinsic radiative losses in nanophotonic and plasmonic systems. In the past decade, there has been substantial attention on the characteristics and excitation methods of toroidal multipoles-in particular, toroidal dipole-in 3D bulk and planar metaplatforms. The remarkable advantages of toroidal resonances have thrust the toroidal metasurface technology from relative anonymity into the limelight, in which researchers have recently centered on developing applied optical and optoelectronic subwavelength devices based on toroidal metaphotonics and metaplasmonics. In this focused contribution, the key principles of 3D and flatland toroidal metastructures are described, and the revolutionary tools that have been implemented based on this topology are briefly highlighted. Infrared photodetectors, immunobiosensors, ultraviolet beam sources, waveguides, and functional modulators are some of the fundamental and latest examples of toroidal metadevices that have been introduced and studied experimentally so far. The possibility of the realization of strong plexciton dynamics and pronounced vacuum Rabi oscillations in toroidal plasmonic metasurfaces are also presented in this review. Ultimate efficient extreme-subwavelength scale devices, such as low-threshold lasers and ultrafast switches, are thus in prospect.

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Section: Active Hybrid Toroidal Metamodulatorsmentioning

confidence: 99%

Toroidal Metaphotonics and Metadevices

Ahmadivand

Gerislioglu

Ahuja

et al. 2020

Laser & Photonics Reviews

105

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“…[ 26,27 ] Nevertheless, these PCMs usually require high thermal annealing temperature conditions. For example, the reamorphization of GST requires a thermal annealing process at a temperature in excess of 800 K. [ 28,29 ] The chemosynthesis process of VO 2 usually requires an annealing temperature in excess of 723 K. [ 30,31 ] In consideration of these high‐temperature requirements, PCM optical films are usually fabricated on substrates such as glass, [ 19,22–24 ] silicon, [ 29 ] sapphire, [ 32 ] and quartz. [ 33 ] However, all of these substrates are rigid and thus further limit exploration to realize flexible optical metadevices.…”

Section: Introductionmentioning

confidence: 99%

Flexible Phase Change Materials for Electrically‐Tuned Active Absorbers

Wang

Xiong

Peng

et al. 2021

Small

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Phase change materials (PCMs), such as GeSbTe (GST) alloys and vanadium dioxide (VO2), play an important role in dynamically tunable optical metadevices. However, the PCMs usually require high thermal annealing temperatures above 700 K, but most flexible metadevices can only work below 500 K owing to the thermal instability of polymer substrates. This contradiction limits the integration of PCMs into flexible metadevices. Here, a mica sheet is chosen as the chemosynthetic support for VO2 and a smooth and uniformly flexible phase change material (FPCM) is realized. Such FPCMs can withstand high temperatures while remaining mechanically flexible. As an example, a metal‐FPCM‐metal infrared meta‐absorber with mechanical flexibility and electrical tunability is demonstrated. Based on the electrically‐tuned phase transition of FPCMs, the infrared absorption of the metadevice is continuously tuned from 20% to 90% as the applied current changes, and it remains quite stable at bending states. The metadevice is bent up to 1500 times, while no visible deterioration is detected. For the first time, the FPCM metastructures are significantly added to the flexible material family, and the FPCM‐based metadevices show various application prospects in electrically‐tunable conformal metadevices, dynamic flexible photodetectors, and active wearable devices.

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“…[ 16 ] These camouflage sheets should be in thermal insulation with the target so that it manifests the same temperatures as that of the background. Studies have reported on emissivity manipulation using paints, [ 17 ] metamaterials, [ 18–24 ] photonic crystals, [ 25–28 ] nanoantennas, [ 29 ] plasmonic structures, [ 30–32 ] phase change materials, [ 33–40 ] graphene, [ 41–43 ] and semiconductors. [ 44,45 ] Most current designs suffer from high specular reflectivity owing to low emissivity.…”

Section: Introductionmentioning

confidence: 99%

Infrared Camouflage Utilizing Ultrathin Flexible Large‐Scale High‐Temperature‐Tolerant Lambertian Surfaces

Huang

Pattanayak

et al. 2021

Laser & Photonics Reviews

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The development of ultrathin, flexible, large-scale, high-temperature-tolerant infrared camouflage devices, which are immune to the external environment, has emerged as an important unsolved challenge. This paper proposes an infrared camouflage device based on the Lambertian surface. The proposed device simultaneously exhibits low emissivity (≈0.1), low specular reflectance (≈0.05), and high temperature (290°C) tolerance over a broad infrared range (0.75-25 μm). Furthermore, the proposed device is ultrathin (≈50 μm), highly flexible, scalable, and can be fabricated at a low cost. The experimental results show that while camouflaging a target (at 65°C), the proposed Lambertian surface can reduce the peak value of the target-background contrast by 68.4% (indoor case) and 76.0% (outdoor case) compared to the conventional low-e (low-emissivity) smooth surface. The calculated detection range of the proposed low-e Lambertian surface is 60% less than that of both the low-e smooth surface and the blackbody. This work proposes a novel method to simultaneously control the radiation and the reflection, thereby introducing a new design paradigm for modern camouflage technology and energy harvesting applications.

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Dynamic Thermal Emission Control Based on Ultrathin Plasmonic Metamaterials Including Phase‐Changing Material GST (Laser Photonics Rev. 11(5)/2017)

Cited by 23 publications

References 0 publications

Toroidal Metaphotonics and Metadevices

Toroidal Metaphotonics and Metadevices

Flexible Phase Change Materials for Electrically‐Tuned Active Absorbers

Infrared Camouflage Utilizing Ultrathin Flexible Large‐Scale High‐Temperature‐Tolerant Lambertian Surfaces

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