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Deng Z, Hu W, Zhou P, Huang L, Wang T, Wang X, Gong R. Broadband tunable laser and infrared camouflage by wavelength-selective scattering metamaterial with radiative thermal management. OPTICS LETTERS 2024; 49:935-938. [PMID: 38359220 DOI: 10.1364/ol.512245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 01/10/2024] [Indexed: 02/17/2024]
Abstract
Metamaterial-based multispectral (including infrared and multiple lasers) camouflage compatible with non-atmospheric window radiative cooling is effective for low observability against multiple detection means. However, simultaneously achieving low reflectance in a non-atmospheric window band and broadband laser scattering, especially for a broadband tunable long-wave infrared laser, remains challenging. This Letter proposes a wavelength-selective scattering metamaterial (WSSM) that realizes effective camouflage for mid-wave infrared (MWIR), long-wave infrared (LWIR), broadband tunable LWIR and near-infrared (NIR) lasers. Moreover, the WSSM achieves radiative cooling in a non-atmospheric window (5-8 µm). The simulated emissivity is 0.19/0.20 in MWIR and LWIR bands, while it is 0.54 in a non-atmospheric window band that ensures radiative cooling. The WSSM also achieves low specular reflectance (4.35%) in 8-12 µm for broadband tunable laser camouflage, together with low reflectance at 1.06 µm and 1.55 µm. The thermal simulation is also conducted, demonstrating that the WSSM has a surface temperature decrement of 12.6°C compared to the conventional low-emissivity reference at the heated temperature of 400°C due to selective emission. The radiation temperatures have a reduction of 37%/64% than the real surface temperature in MWIR and LWIR bands. This work achieves the multispectral compatible camouflage by regulating specular reflection and scattering, providing a novel, to the best of our knowledge, approach for manipulating electromagnetic waves.
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Chen J, Liu X, Wang P, Xiao C, Chen S, Zhou H. Epsilon-near-zero material-based bi-layer metamaterials for selective mid-infrared radiation. NANOTECHNOLOGY 2023; 35:055302. [PMID: 37883949 DOI: 10.1088/1361-6528/ad074f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 10/26/2023] [Indexed: 10/28/2023]
Abstract
Selective mid-infrared (MIR) radiation is highly desirable in many applications. However, there are still great challenges to simultaneously achieve MIR camouflage and radiative cooling utilizing simple structure. This work theoretically and experimentally proposes a bi-layer metamaterial composed of aluminum doped zinc oxide (AZO) nanoparticles embedded in Al2O3matrix on the aluminum film. The bi-layer metamaterial exhibits high performance in MIR camouflage with radiative cooling, a low emissivity (ε3-5μm= 0.11,ε8-14μm= 0.20) in atmospheric windows and a high emissivity (ε5-8μm= 0.81) in non-atmospheric windows. The interaction of the epsilon-near-zero (ENZ) mode and localized surface plasmon resonance (LSPR) mode is responsible for the perfect emission over the wavelength range of 5-8μm. Additionally, the proposed selective MIR emitter supports large-angle incidence and has great polarization insensitivity. This demonstrates that epsilon-near-zero material-based bi-layer metamaterial is highly promising for the development of selective mid-infrared radiation.
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Affiliation(s)
- Ju Chen
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Xianghui Liu
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Pan Wang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Chengyu Xiao
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Shaowen Chen
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Han Zhou
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
- Shenzhen Research Institute, Shanghai Jiao Tong University, Shenzhen, 518057, People's Republic of China
- Future Materials Innovation Center, Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, 429 Zhangheng Road, Shanghai, 201203, People's Republic of China
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Kang Q, Guo K, Guo Z. A tunable infrared emitter based on phase-changing material GST for visible-infrared compatible camouflage with thermal management. Phys Chem Chem Phys 2023; 25:27668-27676. [PMID: 37811767 DOI: 10.1039/d3cp02983b] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Visible-infrared compatible camouflage is important to increase the counter-detection ability of a target due to the fast development of detection systems. However, most of the previously reported visible-infrared compatible camouflage structures are not suitable when the temperature of targets and type of background environment change. In this paper, we propose a tunable infrared emitter composed of ZnS/Ge/Ag/Ge2Sb2Te5/Ag films and numerically demonstrate visible-infrared compatible camouflage and radiation heat dissipation. Firstly, the proposed infrared emitter can produce different structural colors as the thickness of the ZnS film changes, which can be applied to visible camouflage. Secondly, the crystallization fraction of the Ge2Sb2Te5 (GST) layer could help to engineer the average emissivity of the proposed infrared emitter, achieving tunable mid-infrared (MIR) camouflage, radiation heat dissipation, and long-infrared (LIR) camouflage in wavelength ranges of 3-5 μm, 5-8 μm, and 8-14 μm, respectively. Finally, we numerically demonstrate the visible camouflage and infrared camouflage for different application scenarios by using the simulated visible and infrared images. This work has promising application potential in visible-infrared compatible camouflage technology.
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Affiliation(s)
- Qianlong Kang
- School of Computer and Information, Hefei University of Technology, Hefei, 230009, China.
| | - Kai Guo
- School of Computer and Information, Hefei University of Technology, Hefei, 230009, China.
| | - Zhongyi Guo
- School of Computer and Information, Hefei University of Technology, Hefei, 230009, China.
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Qin B, Zhu Y, Zhou Y, Qiu M, Li Q. Whole-infrared-band camouflage with dual-band radiative heat dissipation. LIGHT, SCIENCE & APPLICATIONS 2023; 12:246. [PMID: 37794015 PMCID: PMC10550919 DOI: 10.1038/s41377-023-01287-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 09/01/2023] [Accepted: 09/15/2023] [Indexed: 10/06/2023]
Abstract
Advanced multispectral detection technologies have emerged as a significant threat to objects, necessitating the use of multiband camouflage. However, achieving effective camouflage and thermal management across the entire infrared spectrum, especially the short-wave infrared (SWIR) band, remains challenging. This paper proposes a multilayer wavelength-selective emitter that achieves effective camouflage across the entire infrared spectrum, including the near-infrared (NIR), SWIR, mid-wave infrared (MWIR), and long-wave infrared (LWIR) bands, as well as the visible (VIS) band. Furthermore, the emitter enables radiative heat dissipation in two non-atmospheric windows (2.5-3 μm and 5-8 μm). The emitter's properties are characterized by low emittance of 0.270/0.042/0.218 in the SWIR/MWIR/LWIR bands, and low reflectance of 0.129/0.281 in the VIS/NIR bands. Moreover, the high emittance of 0.742/0.473 in the two non-atmospheric windows ensures efficient radiative heat dissipation, which results in a temperature decrement of 14.4 °C compared to the Cr reference at 2000 W m-2 input power density. This work highlights the role of solar radiance in camouflage, and provides a comprehensive guideline for developing multiband camouflage compatible with radiative heat dissipation, from the visible to LWIR.
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Affiliation(s)
- Bing Qin
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Yining Zhu
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Yiwei Zhou
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Min Qiu
- Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, 18 Shilongshan Road, Hangzhou, 310024, Zhejiang, China
- Institute of Advanced Technology, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou, 310024, Zhejiang, China
| | - Qiang Li
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
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Nong J, Jiang X, Wei X, Zhang Y, Li N, Li X, Chen H, He X, Yu Y, Zhang Z, Zhang Z, Yang J. Optical transparent metamaterial with multi-band compatible camouflage based on inverse design. OPTICS EXPRESS 2023; 31:33622-33637. [PMID: 37859139 DOI: 10.1364/oe.500867] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 09/12/2023] [Indexed: 10/21/2023]
Abstract
Infrared (IR) thermal camouflage and management are deeply desirable in the field of military and astronomy. While IR compatible with laser camouflage technology is extensively studied to counter modern detection systems, most existing strategies for visible light camouflage focus on color matching, which is not suitable for scenarios requiring transparency. In this work, we propose an optically transparent metamaterial with multi-band compatible camouflage capability based on the inverse design. The metamaterial consists of Ag grating, Si3N4 dielectric spacer layer, Ag reflection layer, and Si3N4 anti-reflective layer. An ideal multi-band compatible spectrum is involved in the inverse design algorithm. Calculated results demonstrate high transmittance (T0.38-0.78µm = 0.70) in the visible region, low reflectance (R1.55µm = 0.01) in laser working wavelength, high reflectance (R3-5µm = 0.86 and R8-14µm = 0.92) in the dual-band atmospheric window, and high emissivity (ɛ5-8µm = 0.61) for the non-atmospheric window. The radiative heat flux in the detected band is 31W/m2 and 201W/m2 respectively. Furthermore, the incident and polarized insensitivity of the proposed metamaterial supports applicability for practical situations. This work, emphasizes an effective strategy for conducting optically transparent design with compatible IR-laser camouflage as well as radiative cooling properties by an automated design approach.
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