Hamza Baroud, Fatima Djerfaf, Djalal eddine Bensafieddine, Tahar Aliouar, Sarah Guenou, El Tayeb Bentria
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New bio-inspired composite solar absorber with dynamic thermal regulation via phase change materials
Solar absorbers are critical to the advancement of renewable energy systems via solar to thermal conversion efficiency optimization. We present a triple bio-inspired hierarchical solar absorber with a simulated 98.2% AM1.5-weighted absorption. Its multiscale synergy of fractal tungsten for omnidirectional harvesting (> 95% at 85° incidence) and MXene nano-arrays for high quality factor (Q) resonances (Q = 114.8 at 1068 nm) and near-perfect NIR capture (99.79% at 1068 nm) demonstrates a potential that outperforms that of existing absorbers. Integrated PCM microcapsules provide dynamic thermal management (60 °C isothermal plateau, 20–30 °C temperature reduction). Numerical simulations confirm strong field confinement and volumetric loss in high MXene-PCM interfaces. Thermal management provides material stability (simulated ΔT < 0.05 °C at 4727 °C) under a flux of 1000 W/m2. The structure enhances thermal homogeneity by 10,000 times, setting new standards for deployable solar systems.
期刊介绍：
Optical and Quantum Electronics provides an international forum for the publication of original research papers, tutorial reviews and letters in such fields as optical physics, optical engineering and optoelectronics. Special issues are published on topics of current interest.
Optical and Quantum Electronics is published monthly. It is concerned with the technology and physics of optical systems, components and devices, i.e., with topics such as: optical fibres; semiconductor lasers and LEDs; light detection and imaging devices; nanophotonics; photonic integration and optoelectronic integrated circuits; silicon photonics; displays; optical communications from devices to systems; materials for photonics (e.g. semiconductors, glasses, graphene); the physics and simulation of optical devices and systems; nanotechnologies in photonics (including engineered nano-structures such as photonic crystals, sub-wavelength photonic structures, metamaterials, and plasmonics); advanced quantum and optoelectronic applications (e.g. quantum computing, memory and communications, quantum sensing and quantum dots); photonic sensors and bio-sensors; Terahertz phenomena; non-linear optics and ultrafast phenomena; green photonics.
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