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Ultrawide Spectrum Metallic Plane Blackbody with Extremely High Absorption from 0.2 to 25 µm
Jin-Yong Qi1, Xue-Qing Liu1, Zi-Jian Liu1
1State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, 130012, China.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|November 21, 2024
Summary
Researchers developed an ultrawide spectrum metallic plane blackbody using femtosecond laser fabrication. This novel blackbody achieves over 98% absorption from UV to MIR, crucial for infrared detectors in space sensing.
Area of Science:
- Materials Science
- Optics
- Nanotechnology
Background:
- Plane blackbodies are essential for calibrating infrared detectors in space remote sensing.
- Current blackbodies struggle with uniform, stable absorption across the UV-VIS-NIR-MIR spectrum.
Purpose of the Study:
- To develop an ultrawide spectrum metallic plane blackbody with high absorption.
- To overcome limitations of existing blackbody fabrication methods.
Main Methods:
- Fabrication of cross-scale multi-layered micro- and nanocomposite structures on copper using a femtosecond laser "V"-scanning method.
- Creation of micrometer cone-tip structures, oxide layers, and nanoparticles.
Main Results:
- Achieved uniform high absorption rates exceeding 99% from 400-700 nm.
- Attained over 98% absorption from the UV (200 nm) to MIR (25 µm) range.
- Demonstrated a generalized approach for enhancing surface light absorption.
Conclusions:
- The femtosecond laser method enables fabrication of advanced metallic plane blackbodies.
- This technology has significant potential for infrared calibration, passive radiation cooling, and stray light suppression.
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