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Li L, Cui Q, Zhang YJ, Wu Y, Han CQ, Yan CC. Visible transparent mid-infrared broadband absorbers based on gradient refractive indexes and multi-size cavity resonances. OPTICS EXPRESS 2022; 30:43078-43087. [PMID: 36523014 DOI: 10.1364/oe.473986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 10/25/2022] [Indexed: 06/17/2023]
Abstract
We proposed a multi-layered nanorod structure with the same tilt angle and different diameters, which has high visible transmittance and strong 3-5 µm absorption based on the principles of the gradient of the refractive index and the multi-size cavity resonances. The indium tin oxide (ITO) was selected as the target material to fabricate the structure by using a glancing angle deposition method. The experimental results show that when the deposition angle θ is 80°, swing deposition is successively done with the rotation angle φ of ±8°, ± 5°, ± 3°, and 0° on the surface of the substrate, and the quartz crystal microbalance thicknesses of ITO nanorods are 220 nm for each deposition, the average transmittance is 80.5% in the range of 400-800 nm and the integrated absorption is 86% in the 3-5 µm band. Such a simple, low-cost, and easy-to-fabricate device has potential applications in window stealth materials and other related fields.
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Dolado JS, Goracci G, Duque E, Martauz P, Zuo Y, Ye G. THz Fingerprints of Cement-Based Materials. MATERIALS 2020; 13:ma13184194. [PMID: 32967263 PMCID: PMC7560472 DOI: 10.3390/ma13184194] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 09/10/2020] [Accepted: 09/14/2020] [Indexed: 11/16/2022]
Abstract
To find materials with an appropriate response to THz radiation is key for the incoming THz technology revolution. Unfortunately, this region of the electromagnetic spectra remains largely unexplored in most materials. The present work aims at unveiling the most significant THz fingerprints of cement-based materials. To this end transmission experiments have been carried out over Ordinary Portland Cement (OPC) and geopolymer (GEO) binder cement pastes in combination with atomistic simulations. These simulations have calculated for the first time, the dielectric response of C-S-H and N-A-S-H gels, the most important hydration products of OPC and GEO cement pastes respectively. Interestingly both the experiments and simulations reveal that both varieties of cement pastes exhibit three main characteristic peaks at frequencies around ~0.6 THz, ~1.05 THz and ~1.35 THz, whose origin is governed by the complex dynamic of their water content, and two extra signals at ~1.95 THz and ~2.75 THz which are likely related to modes involving floppy parts of the dried skeleton.
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Affiliation(s)
- Jorge S. Dolado
- Centro de Física de Materiales, CSIC-UPV/EHU, Paseo Manuel de Lardizabal 5, 20018 Donostia/San Sebastián, Spain;
- Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 Donostia/San Sebastián, Spain;
- Microlab, Section Materials and Environment, Faculty of Civil Engineering and Geosciences, Delft University of Technology (TU DELFT), Stevinweg 1, 2628 CN Delft, The Netherlands; (Y.Z.); (G.Y.)
- Correspondence:
| | - Guido Goracci
- Centro de Física de Materiales, CSIC-UPV/EHU, Paseo Manuel de Lardizabal 5, 20018 Donostia/San Sebastián, Spain;
| | - Eduardo Duque
- Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 Donostia/San Sebastián, Spain;
| | - Pavel Martauz
- Povazska Cementaren a.s., Ladce, 01863 Ladce, Slovakia;
| | - Yibing Zuo
- Microlab, Section Materials and Environment, Faculty of Civil Engineering and Geosciences, Delft University of Technology (TU DELFT), Stevinweg 1, 2628 CN Delft, The Netherlands; (Y.Z.); (G.Y.)
- Hubei Key Lab of Control Structures, Huazhong University of Science and Technology, No. 28, Nanli Road, Hong-shan District, Wuhan 430068, China
| | - Guang Ye
- Microlab, Section Materials and Environment, Faculty of Civil Engineering and Geosciences, Delft University of Technology (TU DELFT), Stevinweg 1, 2628 CN Delft, The Netherlands; (Y.Z.); (G.Y.)
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Cao J, Liu X, Chang Q, Yang Z, Zhou H, Fan T. Spectrally tunable nanocomposite metamaterials as near-perfect emitters for mid-infrared thermal radiation management. Phys Chem Chem Phys 2020; 22:28012-28020. [DOI: 10.1039/d0cp04902f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nanocomposite absorbers possess a simple structure and tailorable absorption in the mid-infrared (MIR) region achieved by manipulating structural parameters.
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Affiliation(s)
- Jingrun Cao
- State Key Lab of Metal Matrix Composites
- School of Materials Science and Engineering
- Shanghai Jiao Tong University
- Shanghai
- China
| | - Xianghui Liu
- State Key Lab of Metal Matrix Composites
- School of Materials Science and Engineering
- Shanghai Jiao Tong University
- Shanghai
- China
| | - Qi Chang
- State Key Lab of Metal Matrix Composites
- School of Materials Science and Engineering
- Shanghai Jiao Tong University
- Shanghai
- China
| | - Zhiwei Yang
- State Key Lab of Metal Matrix Composites
- School of Materials Science and Engineering
- Shanghai Jiao Tong University
- Shanghai
- China
| | - Han Zhou
- State Key Lab of Metal Matrix Composites
- School of Materials Science and Engineering
- Shanghai Jiao Tong University
- Shanghai
- China
| | - Tongxiang Fan
- State Key Lab of Metal Matrix Composites
- School of Materials Science and Engineering
- Shanghai Jiao Tong University
- Shanghai
- China
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