Abstract
ABSTRACTEmerging black phosphorene (BP) has unique advantages in mediating near-field thermal radiation due to its strong and tunable in-plane anisotropy, but relative researches are rarely reported in stark contrast to its gained tremendous attention in other fields. Here, we investigate near-field thermal radiation of nanopatterned BP considering different ways of patterning and electronic doping. Appropriate doping increases free carrier density, enabling the transition of BP from dielectrics to hyperbolic materials and the excitation of plasmon resonances. Nanopatterned BP is found to possess a higher radiative transfer rate by as high as 65% compared with plane counterparts due to topological transition of phosphorene ribbon plasmons from quasi-ellipses to quasi-hyperbolas. This work opens alternative routes to mediate and enhance near-field thermal radiation, which has promising applications in efficient thermal management and energy conversion.
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