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arXiv · 2605.13712

Enhanced Near-Field Thermal Radiation Driven by Multiple Corner and Edge Modes in Subwavelength Square Nanowires

Jose Ordonez-Miranda·Minggang Luo·Michele Diego·Roman Anufriev·Victor Guillemot·Masahiro Nomura·Sebastian Volz
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Abstract

We demonstrate that the near-field thermal radiation between subwavelength SiC nanowires with square cross sections is dominated by multiple corner and edge resonances rather than the single surface-phonon-polariton channel of planar surfaces. Fluctuational electrodynamics simulations reveal that these resonances lie within the SiC Reststrahlen band, redshift for thinner nanowires, and yield a four-fold enhancement of thermal conductance. This maximum enhancement occurs when the separation gap nearly matches the nanowire thickness, balancing dimensional confinement and interwire coupling. These findings establish square nanowires as a versatile platform for geometrycontrolled near-field heat transfer in nanoscale heat management and energy conversion.

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Jose Ordonez-Miranda, Minggang Luo, Michele Diego, Roman Anufriev, Victor Guillemot, Masahiro Nomura, Sebastian Volz. 2026-05-13. Enhanced Near-Field Thermal Radiation Driven by Multiple Corner and Edge Modes in Subwavelength Square Nanowires. https://arxiv.org/abs/2605.13712

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