Journal articles: 'Thermal emission metasurfaces'

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Liu, Xiu, Lin Jing, Xiao Luo, Bowen Yu, Shen Du, Zexiao Wang, Hyeonggyun Kim, Yibai Zhong, and Sheng Shen. "Electrically driven thermal infrared metasurface with narrowband emission." Applied Physics Letters 121, no. 13 (September 26, 2022): 131703. http://dx.doi.org/10.1063/5.0116880.

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Metasurfaces consisting of an array of planar sub-wavelength structures have shown great potentials in controlling thermal infrared radiation, including intensity, coherence, and polarization. These capabilities together with the two-dimensional nature make thermal metasurfaces an ultracompact multifunctional platform for infrared light manipulation. Integrating the functionalities, such as amplitude, phase (spectrum and directionality), and polarization, on a single metasurface offers fascinating device responses. However, it remains a significant challenge to concurrently optimize the optical, electrical, and thermal responses of a thermal metasurface in a small footprint. In this work, we develop a center-contacted electrode line design for a thermal infrared metasurface based on a gold nanorod array, which allows local Joule heating to electrically excite the emission without undermining the localized surface plasmonic resonance. The narrowband emission of thermal metasurfaces and their robustness against temperature nonuniformity demonstrated in this work have important implications for the applications in infrared imaging, sensing, and energy harvesting.

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Park, Junghyun, Ju-Hyung Kang, Xiaoge Liu, Scott J. Maddox, Kechao Tang, Paul C. McIntyre, Seth R. Bank, and Mark L. Brongersma. "Dynamic thermal emission control with InAs-based plasmonic metasurfaces." Science Advances 4, no. 12 (December 2018): eaat3163. http://dx.doi.org/10.1126/sciadv.aat3163.

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Thermal emission from objects tends to be spectrally broadband, unpolarized, and temporally invariant. These common notions are now challenged with the emergence of new nanophotonic structures and concepts that afford on-demand, active manipulation of the thermal emission process. This opens a myriad of new applications in chemistry, health care, thermal management, imaging, sensing, and spectroscopy. Here, we theoretically propose and experimentally demonstrate a new approach to actively tailor thermal emission with a reflective, plasmonic metasurface in which the active material and reflector element are epitaxially grown, high-carrier-mobility InAs layers. Electrical gating induces changes in the charge carrier density of the active InAs layer that are translated into large changes in the optical absorption and thermal emission from metasurface. We demonstrate polarization-dependent and electrically controlled emissivity changes of 3.6%P (6.5% in relative scale) in the mid-infrared spectral range.

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Sakr, Enas, Deanna Dimonte, and Peter Bermel. "Metasurfaces with Fano resonances for directionally selective thermal emission." MRS Advances 1, no. 49 (2016): 3307–16. http://dx.doi.org/10.1557/adv.2016.526.

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ABSTRACTThermal emission impacts a wide variety of applications, including thermophotovoltaics, photovoltaics, photon-enhanced thermionic emission, selective solar absorption, incandescent lighting, and spectroscopy. Ordinary structures generally emit a broad range of wavelengths, angles, and polarizations. However, highly selective thermal emission has potential to greatly improve performance in many of these applications. While prior work has explored a wide range of structures to provide some degree of control of one or more of these attributes, there is an ongoing challenge in combining readily-fabricated, simple structures made of appropriate (e.g., heat-resistant) materials with the desired functionality. Here, we will focus on using metasurfaces in conjunction with refractory materials as a platform for achieving selective control of emission. These structures are built from sub-wavelength elements that support localization of surface plasmon polaritons or electromagnetic resonant modes with appropriate attributes. Modeling is performed using rigorous coupled wave analysis (RCWA), plus Kirchhoff’s law of thermal radiation, which is further validated using finite-difference time domain (FDTD) simulations and coupled-mode analysis. Such structures can be considered arbitrarily directional sources that can be carefully patterned in lateral directions to yield a thermal lens with a designed focal length and/or concentration ratio; the benefit of this approach is that it can enhance the view factor between thermal emitters and receivers, without restricting the area ratio or separation distance. This design and modeling platform is then applied to exclude thermal radiation over a certain range of angles. In this work, we study the effect of controlling the angular width and direction on the view factor, and we explore angular dependence of these angular selective structures.

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Barho, Franziska B., Fernando Gonzalez-Posada, Mario Bomers, Aude Mezy, Laurent Cerutti, and Thierry Taliercio. "Surface-Enhanced Thermal Emission Spectroscopy with Perfect Absorber Metasurfaces." ACS Photonics 6, no. 6 (May 16, 2019): 1506–14. http://dx.doi.org/10.1021/acsphotonics.9b00254.

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Salihoglu, Hakan, Zhuo Li, and Sheng Shen. "Theory of thermal radiation from a nanoparticle array." Applied Physics Letters 121, no. 24 (December 12, 2022): 241701. http://dx.doi.org/10.1063/5.0117131.

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Thermal radiation has diffusive and broad emission characteristics. Controlling emission spectrum and direction is essential for various applications. Nanoparticle arrays, supporting collective lattice resonances, can be employed for controlling optical properties. However, thermal emission characteristics remain unexplored due to the lack of a theoretical model. Here, we develop an analytical model to predict thermal radiation from a nanoparticle array using fluctuation–dissipation theorem and lattice Green's functions. Our findings reveal that the periodicity and particle size of the particle array are main parameters to control both emission spectrum and direction. The derived simple expression for thermal emission enables insightful interpretation of physics. This model will lay a foundation for analytical derivation of thermal radiation from metasurfaces. Our study can be useful in engineering infrared thermal sources and radiative cooling applications.

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Blanchard, Cedric, Leo Wojszvzyk, Cecile Jamois, Jean-Louis Leclercq, Celine Chevalier, Lydie Ferrier, Pierre Viktorovitch, et al. "Metallo-dielectric metasurfaces for thermal emission with controlled spectral bandwidth and angular aperture." Optical Materials Express 12, no. 1 (December 2, 2021): 1. http://dx.doi.org/10.1364/ome.443111.

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Zhang, Xia, Zhen-guo Zhang, Qiang Wang, Shi-ning Zhu, and Hui Liu. "Controlling Thermal Emission by Parity-Symmetric Fano Resonance of Optical Absorbers in Metasurfaces." ACS Photonics 6, no. 11 (September 30, 2019): 2671–76. http://dx.doi.org/10.1021/acsphotonics.9b00024.

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Yang, Yue, Sydney Taylor, Hassan Alshehri, and Liping Wang. "Wavelength-selective and diffuse infrared thermal emission mediated by magnetic polaritons from silicon carbide metasurfaces." Applied Physics Letters 111, no. 5 (July 31, 2017): 051904. http://dx.doi.org/10.1063/1.4996865.

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Kumagai, Takuhiro, Naoki To, Armandas Balčytis, Gediminas Seniutinas, Saulius Juodkazis, and Yoshiaki Nishijima. "Kirchhoff’s Thermal Radiation from Lithography-Free Black Metals." Micromachines 11, no. 9 (August 30, 2020): 824. http://dx.doi.org/10.3390/mi11090824.

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Lithography-free black metals composed of a nano-layered stack of materials are attractive not only due to their optical properties but also by virtue of fabrication simplicity and the cost reduction of devices based on such structures. We demonstrate multi-layer black metal layered structures with engineered electromagnetic absorption in the mid-infrared (MIR) wavelength range. Characterization of thin SiO2 and Si films sandwiched between two Au layers by way of experimental electromagnetic radiation absorption and thermal radiation emission measurements as well as finite difference time domain (FDTD) numerical simulations is presented. Comparison of experimental and simulation data derived optical properties of multi-layer black metals provide guidelines for absorber/emitter structure design and potential applications. In addition, relatively simple lithography-free multi-layer structures are shown to exhibit absorber/emitter performance that is on par with what is reported in the literature for considerably more elaborate nano/micro-scale patterned metasurfaces.

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Huang, Lujun, Alex Krasnok, Andrea Alú, Yiling Yu, Dragomir Neshev, and Andrey E. Miroshnichenko. "Enhanced light–matter interaction in two-dimensional transition metal dichalcogenides." Reports on Progress in Physics 85, no. 4 (March 8, 2022): 046401. http://dx.doi.org/10.1088/1361-6633/ac45f9.

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Abstract Two-dimensional (2D) transition metal dichalcogenide (TMDC) materials, such as MoS2, WS2, MoSe2, and WSe2, have received extensive attention in the past decade due to their extraordinary electronic, optical and thermal properties. They evolve from indirect bandgap semiconductors to direct bandgap semiconductors while their layer number is reduced from a few layers to a monolayer limit. Consequently, there is strong photoluminescence in a monolayer (1L) TMDC due to the large quantum yield. Moreover, such monolayer semiconductors have two other exciting properties: large binding energy of excitons and valley polarization. These properties make them become ideal materials for various electronic, photonic and optoelectronic devices. However, their performance is limited by the relatively weak light–matter interactions due to their atomically thin form factor. Resonant nanophotonic structures provide a viable way to address this issue and enhance light–matter interactions in 2D TMDCs. Here, we provide an overview of this research area, showcasing relevant applications, including exotic light emission, absorption and scattering features. We start by overviewing the concept of excitons in 1L-TMDC and the fundamental theory of cavity-enhanced emission, followed by a discussion on the recent progress of enhanced light emission, strong coupling and valleytronics. The atomically thin nature of 1L-TMDC enables a broad range of ways to tune its electric and optical properties. Thus, we continue by reviewing advances in TMDC-based tunable photonic devices. Next, we survey the recent progress in enhanced light absorption over narrow and broad bandwidths using 1L or few-layer TMDCs, and their applications for photovoltaics and photodetectors. We also review recent efforts of engineering light scattering, e.g., inducing Fano resonances, wavefront engineering in 1L or few-layer TMDCs by either integrating resonant structures, such as plasmonic/Mie resonant metasurfaces, or directly patterning monolayer/few layers TMDCs. We then overview the intriguing physical properties of different van der Waals heterostructures, and their applications in optoelectronic and photonic devices. Finally, we draw our opinion on potential opportunities and challenges in this rapidly developing field of research.

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David, Christin, and Robert Hussein. "Advances in Photovoltaic Technologies from Atomic to Device Scale." Photonics 9, no. 11 (November 8, 2022): 837. http://dx.doi.org/10.3390/photonics9110837.

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The question of how energy resources can be efficiently used is likewise of fundamental and technological interest. In this opinion, we give a brief overview on developments of harvesting solar energy across different length scales and address some strategies to tackle economic and ecological challenges, in particular with a view to sustainability and toward a circular economy. On the mesoscopic scale, the emergence of thermodynamic laws in open quantum systems is of central importance and how they can be employed for efficient quantum thermal machines and batteries. The broad tunability of band gaps in quantum dot systems makes them attractive for hybrid photovoltaic devices. Complementary, machine learning-aided band gap engineering and the high-throughput screening of novel materials assist with improving absorption characteristics. On the device scale, hybrid concepts of optical control via metasurfaces enable a multitude of functionalities such as a directed re-emission of embedded photoluminescent materials or field enhancement effects from nanostructures. Advanced techniques in computational nanophotonics concern a topology optimization of nanostructured layers together with multiobjective optimization toward specific light management tasks. On the industrial level, modern manufacturers explore 3D printing and flexible solar cell platforms obtained from roll-to-roll technologies. The remote control of solar parks through applications via the Internet of Things opens up new strategies to expand to difficult terrain where human interaction is only required to a limited extent.

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Cao, Tun, Xinyu Zhang, Weiling Dong, Li Lu, Xilin Zhou, Xin Zhuang, Junhong Deng, Xing Cheng, Guixin Li, and Robert E. Simpson. "Tuneable Thermal Emission Using Chalcogenide Metasurface." Advanced Optical Materials 6, no. 16 (June 10, 2018): 1800169. http://dx.doi.org/10.1002/adom.201800169.

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Yada, Kyohei, Takashi Shimojo, Hideyuki Okada, and Atsushi Sakurai. "Theoretical and Numerical Analysis of Active Switching for Narrow-Band Thermal Emission with Graphene Ribbon Metasurface." Sensors 21, no. 20 (October 11, 2021): 6738. http://dx.doi.org/10.3390/s21206738.

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Components smaller than the wavelength of electromagnetic waves are called meta-atoms. Thermal emission can be controlled by an artificial structure in which these meta-atoms are arranged on the surface. This artificial structure is called a metasurface, and its optical properties are determined by the materials and shapes of the meta-atoms. However, optical devices may require active control of thermal emission. In the present study, we theoretically and numerically analyze a wavelength-selective emitter using a graphene ribbon metasurface. The graphene ribbon metasurface consists of a graphene ribbon array, potassium bromide thin film, and silver substrate. The geometric parameters of the graphene metasurface are determined based on an equivalent circuit model that agrees well with the results of the electromagnetic field analysis (rigorous coupled-wave analysis). The proposed emitter causes impedance matching depending on the conductivity of the graphene ribbon in a very narrow wavelength range. The conductivity of graphene can be actively controlled by the gate voltage. Therefore, the proposed emitters may realize near-perfect emission with a high quality factor and active controllable switching for various wavelengths. In addition, the quality factor can be changed by adjusting the electron mobility of graphene. The proposed emitter can be used for optical devices such as thermophotovoltaic systems and biosensing.

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Araki, Ken, and Richard Z. Zhang. "Simultaneous solar rejection and infrared emission switching using an integrated dielectrics-on-VO₂ metasurface." AIP Advances 12, no. 5 (May 1, 2022): 055205. http://dx.doi.org/10.1063/5.0085111.

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Passive infrared emittance switching can be achieved with a metal-to-insulating phase transition material vanadium dioxide (VO2), but its non-transitioning bandgap results in high absorptance in the visible wavelength range. To achieve a half-order reduction of absorptance in the visible to near-infrared region, we design integrated dielectric photonic metasurface structures on monolithic VO2 coatings. This combination of nano/micro-patterned dielectric diffractive and resonant gratings with a multilayer VO2 structure preserves the terrestrial thermal wavelength emission switching capabilities. We demonstrate a periodic microscale diffractive prism array, comparing the reflectance provided by either infrared-transparent germanium (Ge) or silicon (Si). Despite the advantage of total internal reflection in the broad near-infrared region, some bandgap absorption limits the performance in the visible wavelengths. A better theoretical means to reflect broadband light via waveguide-like Fabry–Pérot resonance are near-wavelength 1D and 2D High Contrast Grating (HCG) high-index metasurface structures surrounded by a low-index host medium. This HCG metasurface allows broadband high-quality reflection within the dual-mode (or tri-mode) region from 1.0 to 2.2 µm wavelengths for HCG with a refractive index of 4.0, which corresponds to Ge. This study investigates the advantages and disadvantages along with the thermal performance of these metasurface augments aimed to enable thermally switchable passive radiative cooling—thermal emission exceeding solar absorption—of solar cells, terrestrial buildings, and energy storage devices.

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Лаврухин, Д. В., А. Э. Ячменев, И. А. Глинский, Н. В. Зенченко, Р. А. Хабибуллин, Ю. Г. Гончаров, И. Е. Спектор, К. И. Зайцев, and Д. С. Пономарев. "Излучательная эффективность терагерцовых антенн с традиционной топологией и металлической метаповерхностью: сравнительный анализ." Журнал технической физики 129, no. 7 (2020): 1012. http://dx.doi.org/10.21883/os.2020.07.49575.19-20.

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We report on experimental study of the photoconductive antennas (PCA)-emitters featuring conventional topology as well as metallic metasurface with plasmonic grating, based on the InGaAs/InAlAs superlattices. We measure and determine the photocurrents and the emission spectra of the PCAs, as well as the energy characteristics of the terahertz (THz) radiation, and the efficiency of the optical-to-THz conversion for different bias voltages and average laser excitation power. The integral THz emission power of 10 μW as well as conversion efficiency of 0.2% are demonstrated for the PCA with the metasurface, which are not reachable for the conventional due to thermal breakdown of the antenna. Therefore, the PCAs with the metasurface can be considered to be the attractive THz emitters that can potentially become among the elemental base for modern THz spectroscopic systems for biomedical applications.

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Mihai, Laura, Razvan Mihalcea, Roxana Tomescu, Costel Paun, and Dana Cristea. "Selective Mid-IR Metamaterial-Based Gas Sensor System: Proof of Concept and Performances Tests." Nanomaterials 12, no. 6 (March 18, 2022): 1009. http://dx.doi.org/10.3390/nano12061009.

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In this paper, we propose a highly selective and efficient gas detection system based on a narrow-band IR metasurface emitter integrated with a resistive heater. In order to develop the sensor for the detection of specific gases, both the microheater and metasurface structures have been optimized in terms of geometry and materials. Devices with different metamaterial structures and geometries for the heater have been tested. Our prototype showed that the modification of the spectral response of metasurface-based structures is easily achieved by adapting the geometrical parameters of the plasmonic micro-/nanostructures in the metasurface. The advantage of this system is the on-chip integration of a thermal source with broad IR radiation with the metasurface structure, obtaining a compact selective radiation source. From the experimental data, narrow emission peaks (FWHM as low as 0.15 μm), corresponding to the CO2, CH4, and CO absorption bands, with a radiant power of a few mW were obtained. It has been shown that, by changing the bias voltage, a shift of a few tens of nm around the central emission wavelength can be obtained, allowing fine optimization for gas detection applications.

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Sakurai, Atsushi, and Yuki Matsuno. "Design and Fabrication of a Wavelength-Selective Near-Infrared Metasurface Emitter for a Thermophotovoltaic System." Micromachines 10, no. 2 (February 25, 2019): 157. http://dx.doi.org/10.3390/mi10020157.

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In this study, a tungsten-SiO2-based metal–insulator–metal-structured metasurface for the thermal emitter of the thermophotovoltaic system was designed and fabricated. The proposed emitter was fabricated by applying the photolithography method. The fabricated emitter has high emissivity in the visible to near-infrared region and shows excellent wavelength selectivity. This spectral emissivity tendency agreed well with the result calculated by the finite-difference time-domain method. Additionally, the underlying mechanism of its emission was scrutinized. Study of the fabrication process and theoretical mechanisms of the emission, clarified in this research, will be fundamental to design the wavelength-selective thermal emitter.

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Nishijima, Yoshiaki, Shinya Morimoto, Armandas Balčytis, Tomoki Hashizume, Ryosuke Matsubara, Atsushi Kubono, Naoki To, Meguya Ryu, Junko Morikawa, and Saulius Juodkazis. "Coupling of molecular vibration and metasurface modes for efficient mid-infrared emission." Journal of Materials Chemistry C 10, no. 2 (2022): 451–62. http://dx.doi.org/10.1039/d1tc04519a.

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We demonstrate extraordinarily spectrally selective narrowband mid-infrared radiation via coupling of plasmon resonance and molecular vibration. Absorbance and thermal emittance with resonant peak FWHM ≤ 124 nm at λ = 5.73 μm, corresponding to a Q-factor of ∼92.3 were obtained.

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Dyakov, S. A., A. V. Ignatov, S. G. Tikhodeev, and N. A. Gippius. "Circularly polarized thermal emission from chiral metasurface in the absence of magnetic field." Journal of Physics: Conference Series 1092 (September 2018): 012028. http://dx.doi.org/10.1088/1742-6596/1092/1/012028.

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Brongersma, Mark L. "The road to atomically thin metasurface optics." Nanophotonics 10, no. 1 (November 25, 2020): 643–54. http://dx.doi.org/10.1515/nanoph-2020-0444.

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AbstractThe development of flat optics has taken the world by storm. The initial mission was to try and replace conventional optical elements by thinner, lightweight equivalents. However, while developing this technology and learning about its strengths and limitations, researchers have identified a myriad of exciting new opportunities. It is therefore a great moment to explore where flat optics can really make a difference and what materials and building blocks are needed to make further progress. Building on its strengths, flat optics is bound to impact computational imaging, active wavefront manipulation, ultrafast spatiotemporal control of light, quantum communications, thermal emission management, novel display technologies, and sensing. In parallel with the development of flat optics, we have witnessed an incredible progress in the large-area synthesis and physical understanding of atomically thin, two-dimensional (2D) quantum materials. Given that these materials bring a wealth of unique physical properties and feature the same dimensionality as planar optical elements, they appear to have exactly what it takes to develop the next generation of high-performance flat optics.

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Zhang, Deng, Song, and Zhang. "Broadband Near-Infrared Absorber Based on All Metallic Metasurface." Materials 12, no. 21 (October 30, 2019): 3568. http://dx.doi.org/10.3390/ma12213568.

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Perfect broadband absorbers have increasingly been considered as important components for controllable thermal emission, energy harvesting, modulators, etc. However, perfect absorbers which can operate over a wide optical regime is still a big challenge to achieve. Here, we propose and numerically investigate a perfect broadband near-infrared absorber based on periodic array of four isosceles trapezoid prism (FITP) unit cell made of titanium (Ti) over a continuous silver film. The structure operates with low quality (Q) factor of the localized surface plasmon resonance (LSPR) because of the intrinsic high loss, which is the foundation of the broadband absorption. The high absorption of metal nanostructures mainly comes from the power loss caused by the continuous electron transition excited by the incident light inside the metal, and the resistance loss depends on the enhanced localized electric field caused by the FITP structure. Under normal incidence, the simulated absorption is over 90% in the spectrum ranging from 895 nm to 2269 nm. The absorber is polarization-independent at normal incidence, and has more than 80% high absorption persisting up to the incident angle of ~45° at TM polarization.

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Chu, Qiongqiong, Fengyuan Zhang, Ye Zhang, Tong Qiao, Shining Zhu, and Hui Liu. "Integrated thermal emission microchip based on meta-cavity array." Nanophotonics, August 11, 2022. http://dx.doi.org/10.1515/nanoph-2022-0328.

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Abstract Microscale infrared thermal emitters are highly demanded in a variety of applications such as micro-molecular thermal sensing and micro-thermal imaging. In this paper, we propose a micro-meta-cavity array through combining nanohole metasurfaces and Fabry–Pérot (FP) cavity. Based on this design, integrated multiband micro-thermal emitters covering 7 − 9 μm and 10 − 14 μm wavelength ranges with high spatial resolution near wavelength scale has been theoretically and experimentally demonstrated simultaneously, providing the possibility for microscale infrared sources. In addition, narrow thermal emission bandwidth is enabled by the interaction between the resonant modes of metasurface and the FP cavity mode in meta-cavity. The emission features of each meta-cavity are investigated and analyzed through thermal imaging. Furthermore, polarization, wavelength and spatial multiplexing thermal emission with high spatial resolution is also experimentally demonstrated utilizing nanohole patterns. We anticipate that this thermal emission microchip can be possibly employed in micro-molecular sensing and micro-thermal imaging in the future.

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Wojszvzyk, Léo, Anne Nguyen, Anne-Lise Coutrot, Cheng Zhang, Benjamin Vest, and Jean-Jacques Greffet. "An incandescent metasurface for quasimonochromatic polarized mid-wave infrared emission modulated beyond 10 MHz." Nature Communications 12, no. 1 (March 5, 2021). http://dx.doi.org/10.1038/s41467-021-21752-w.

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AbstractIncandescent sources such as hot membranes and globars are widely used for mid-infrared spectroscopic applications. The emission properties of these sources can be tailored by means of resonant metasurfaces: control of the spectrum, polarization, and directivity have been reported. For detection or communication applications, fast temperature modulation is desirable but is still a challenge due to thermal inertia. Reducing thermal inertia can be achieved using nanoscale structures at the expense of a low absorption and emission cross-section. Here, we introduce a metasurface that combines nanoscale heaters to ensure fast thermal response and nanophotonic resonances to provide large monochromatic and polarized emissivity. The metasurface is based on platinum and silicon nitride and can sustain high temperatures. We report a peak emissivity of 0.8 and an operation up to 20 MHz, six orders of magnitude faster than commercially available hot membranes.

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Zhang, X., H. Liu, Z. G. Zhang, Q. Wang, and S. N. Zhu. "Controlling thermal emission of phonon by magnetic metasurfaces." Scientific Reports 7, no. 1 (February 3, 2017). http://dx.doi.org/10.1038/srep41858.

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RahimianOmam, Zahra, Amir Ghobadi, Bahram Khalichi, and Ekmel Özbay. "Adaptive thermal camouflage using sub-wavelength phase-change metasurfaces." Journal of Physics D: Applied Physics, November 18, 2022. http://dx.doi.org/10.1088/1361-6463/aca41d.

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Abstract Sub-wavelength metasurface designs can be used to artificially engineer the spectral thermal signature of an object. The real-time control of this emission can provide the opportunity to switch between radiative cooling and thermal camouflage functionalities. This performance could be achieved by using phase-change materials (PCMs). This paper presents a sub-wavelength dynamic metasurface design with the adaptive property. The proposed metasurface is made of vanadium dioxide (VO2) nanogratings on a silver (Ag) substrate. The design geometries are optimized in a way that both narrowband and broadband mid-infrared (MIR) emitters can be realized. At low temperatures, insulating VO2 nanogratings trigger the excitation of Fabry-Perot mode inside the grating and surface plasmon polaritons at the metal-dielectric interface with an emission peak located in the MIR region to maximize the radiative cooling performance of the design. As temperature rises, the PCM transforms into a metallic phase material and supports excitation of Wood’s anomaly and localized surface plasmon resonance modes. Accordingly, the thermal signature is adaptively suppressed.

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Li, Jiayu, Zhuo Li, Xiu Liu, Stanislav Maslovski, and Sheng Shen. "Active control of thermal emission by graphene-nanowire coupled plasmonic metasurfaces." Physical Review B 106, no. 11 (September 14, 2022). http://dx.doi.org/10.1103/physrevb.106.115416.

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Overvig, Adam C., Sander A. Mann, and Andrea Alù. "Thermal Metasurfaces: Complete Emission Control by Combining Local and Nonlocal Light-Matter Interactions." Physical Review X 11, no. 2 (June 4, 2021). http://dx.doi.org/10.1103/physrevx.11.021050.

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Costantini, D., A. Lefebvre, A. L. Coutrot, I. Moldovan-Doyen, J. P. Hugonin, S. Boutami, F. Marquier, H. Benisty, and J. J. Greffet. "Plasmonic Metasurface for Directional and Frequency-Selective Thermal Emission." Physical Review Applied 4, no. 1 (July 30, 2015). http://dx.doi.org/10.1103/physrevapplied.4.014023.

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Dyakov, S. A., V. A. Semenenko, N. A. Gippius, and S. G. Tikhodeev. "Magnetic field free circularly polarized thermal emission from a chiral metasurface." Physical Review B 98, no. 23 (December 17, 2018). http://dx.doi.org/10.1103/physrevb.98.235416.

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Zhu, Huanzheng, Qiang Li, Chenning Tao, Yu Hong, Ziquan Xu, Weidong Shen, Sandeep Kaur, Pintu Ghosh, and Min Qiu. "Multispectral camouflage for infrared, visible, lasers and microwave with radiative cooling." Nature Communications 12, no. 1 (March 22, 2021). http://dx.doi.org/10.1038/s41467-021-22051-0.

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AbstractInterminable surveillance and reconnaissance through various sophisticated multispectral detectors present threats to military equipment and manpower. However, a combination of detectors operating in different wavelength bands (from hundreds of nanometers to centimeters) and based on different principles raises challenges to the conventional single-band camouflage devices. In this paper, multispectral camouflage is demonstrated for the visible, mid-infrared (MIR, 3–5 and 8–14 μm), lasers (1.55 and 10.6 μm) and microwave (8–12 GHz) bands with simultaneous efficient radiative cooling in the non-atmospheric window (5–8 μm). The device for multispectral camouflage consists of a ZnS/Ge multilayer for wavelength selective emission and a Cu-ITO-Cu metasurface for microwave absorption. In comparison with conventional broadband low emittance material (Cr), the IR camouflage performance of this device manifests 8.4/5.9 °C reduction of inner/surface temperature, and 53.4/13.0% IR signal decrease in mid/long wavelength IR bands, at 2500 W ∙ m−2 input power density. Furthermore, we reveal that the natural convection in the atmosphere can be enhanced by radiation in the non-atmospheric window, which increases the total cooling power from 136 W ∙ m−2 to 252 W ∙ m−2 at 150 °C surface temperature. This work may introduce the opportunities for multispectral manipulation, infrared signal processing, thermal management, and energy-efficient applications.

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Journal articles on the topic 'Thermal emission metasurfaces'

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