Pixel-level metal blackbody microcavities via hierarchical laser writing.

ABSTRACT: Conventional blackbody cavities, known for their near-unity broadband omnidirectional emissivity (absorptivity), are however constrained by their large volume (e.g., >10⁴ cm³), imposing crucial restrictions on integration with existing devices. Here, we introduce the concept of metal blackbody microcavities, comprising thousands of microscale periodic pores created on metals, demonstrating excellent emissivity across visible and infrared (IR) ranges (exceeding 0.94 on average from 0.25 to 20 μm). In the long-wavelength IR (8 to 14 μm) region, near-unity emissivity was successfully achieved by 100-μm-deep metal microcavities with ultralow structural aspect ratios, facilitated by laser-textured multiscale surface morphologies that substantially enhance the light-trappin

SUBMITTER: Ng CK 

PROVIDER: S-EPMC11870063 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature