journal article·2024-01-17Open access

Bicolor Regulation of an Ultrathin Absorber in the Mid-Wave Infrared and Long-Wave Infrared Regimes

Xinpeng Jiang, Xinfei Wang, Jie Nong, Gangyi Zhu, Xin He, Te Du, Hansi Ma, Zhaojian Zhang, Huan Chen, Yang Yu, Dongqing Liu, Peiguang Yan, Jiagui Wu, Zhenfu Zhang, Junbo Yang

ACS Photonics· Volume 11· Issue 1

Abstract

Thermal radiation in the mid-wave infrared (MWIR) and long-wave infrared (LWIR) regions profoundly influences human lives. However, most thermal radiation regulators exhibit mismatched spectral characteristics and multiband incompatibility. Here, we introduce a new type of ultrathin absorber─a dual-band dynamic optical coating (DBDOC)─to realize the independent regulation of MWIR and LWIR regions. A new framework of thermal radiation regulation is employed to maximize the independent emissivity performance of the DBDOC in the MWIR and LWIR regions. The bicolor emissivity changes for the DBDOC are 0.80 and 0.46 in the MWIR (3–5 μm) and LWIR (8–14 μm) regions, respectively, with slight emissivity changes of 0.25 and 0.03 in the opposite regions. We experimentally demonstrate bicolor thermal imaging with different MWIR and LWIR information via independent emissivity regulation of MWIR and LWIR regions. We further validate gray-scale thermal imaging regulation in the LWIR region and the associated dynamic process at different heating temperatures in the MWIR region. The results demonstrate the experimental realization of independent thermal radiation regulation in the MWIR and LWIR regimes.
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Research context

OpenAlex topics: Thermal Radiation and Cooling Technologies · Metamaterials and Metasurfaces Applications · Optical Polarization and Ellipsometry

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Center of Material Science, College of Sciences, National University of Defense Technology, Changsha 410073, China

Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China

Peter Grünberg Research Centre, College of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China

School of Physical Science and Technology, Southwest University, Chongqing 400715, China

Funding

Program for New Century Excellent Talents in University · National University of Defense Technology · Natural Science Foundation of Hunan Province · National Key Research and Development Program of China · Hunan Provincial Innovation Foundation for Postgraduate · China Postdoctoral Science Foundation · National Natural Science Foundation of China

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