黑磷光栅的光学特性及其近场辐射换热特性

Due to the contribution of evanescent waves, near-field radiation heat transfer (NFRHT) can exceed the blackbody limit by several orders of magnitude. The regulation of NFRHT is important in frontier fields such as near-field thermal photovoltaics and thermal managements. Black phosphorus (BP) is a potential functional material that can be used for controlling the NFRHT. This paper studies the unique optical properties of BP gratings, and then studies the NFRHT characteristics of type I and II BP gratings. It is found that both type I and type II gratings can support hyperbolic surface plasmon polaritons (HSPPs), but the propagation intensity of HSPPs of type I gratings is weaker than that of type II gratings. Adjusting the electron doping, rotation angle and filling factors to proper values can effectively enhance the NFRHT. This study can help to understand the regulation characteristics of NFRHT between BP.