One-step rolling fabrication of VO<sub>2</sub> tubular bolometers with polarization-sensitive and omnidirectional detection.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 37851806.
- Also identified by DOI 10.1126/sciadv.adi7805 and PMC identifier 10584336.
- Licence recorded as CC BY-NC.
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Abstract
Uncooled infrared detection based on vanadium dioxide (VO<sub>2</sub>) radiometer is highly demanded in temperature monitoring and security protection. The key to its breakthrough is to fabricate bolometer arrays with great absorbance and excellent thermal insulation using a straightforward procedure. Here, we show a tubular bolometer by one-step rolling VO<sub>2</sub> nanomembranes with enhanced infrared detection. The tubular geometry enhances the thermal insulation, light absorption, and temperature sensitivity of freestanding VO<sub>2</sub> nanomembranes. This tubular VO<sub>2</sub> bolometer exhibits a detectivity of ~2 × 10<sup>8</sup> cm Hz<sup>1/2</sup> W<sup>-1</sup> in the ultrabroad infrared spectrum, a response time of ~2.0 ms, and a calculated noise-equivalent temperature difference of 64.5 mK. Furthermore, our device presents a workable structural paradigm for polarization-sensitive and omnidirectional light coupling bolometers. The demonstrated overall characteristics suggest that tubular bolometers have the potential to narrow performance and cost gap between photon detectors and thermal detectors with low cost and broad applications.