Multifunctional Radiation Conditioning Emitter for Laser and Infrared with Adaptive Radiative Cooling

With the development of technology, multifunctional multiband emitters have been paid much attention due to their wide range of applications, such as LIDAR detection, spectroscopic sensing, and infrared thermal management. However, the development of such emitters is impeded by incompatible structural requirements of different electromagnetic wavebands. Here, we demonstrate coupled modulation between near-infrared (NIR) laser-wavelength and long-wavelength-infrared by constructing a multifunctional emitter (MFE) with a structure of Al/HfO₂/VO₂, utilizing the phase transition of VO₂. The MFE displays excellent thermal modulation capability within the 8-14 μm range, achieving a thermal insulation effect (ϵ_{8-14 μm} = 0.18) at low temperatures, and heat dissipation effect (ϵ_{8-14 μm} = 0.64) at high temperatures. The MFE’s radiation power regulation capability is 145.06 W m^-2 between a temperature of 0 to 60 °C. Moreover, the MFE possesses a large reflectivity modulation value of 0.78 at NIR laser-wavelength (1.06 μm) with a short phase transition time of 1003 ms under 3 W cm^-2 laser irradiation. This study provides a guideline for the coordinated control of electromagnetic waves and intelligent collaborative thermal management through simple structural design, thus, having broad implications in energy saving and thermal information processing.