Long-range mid-infrared energy transfer mediated by hyperbolic phonon polaritons

• URL: http://arxiv.org/abs/2603.06184v1
• Date: Fri, 06 Mar 2026 11:44:14 GMT
• Title: Long-range mid-infrared energy transfer mediated by hyperbolic phonon polaritons
• Abstract summary: We show that phonon polaritons can mediate and enhance room-temperature energy transfer at ranges far exceeding conventional mid-infrared platforms.<n>This is because the dipole-dipole interaction potential energy diverges along the asymptotes of the real-space hyperbolic opening angle.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: We provide a framework to theoretically describe long-range energy transfer in single and twisted two-dimensional hyperbolic slabs. We demonstrate that phonon polaritons (PhPs, quantum superpositions of photons and lattice vibrations in polar dielectrics) can mediate and enhance room-temperature energy transfer at ranges far exceeding those of conventional mid-infrared (MIR) platforms, and with extreme directionality. This is because the dipole-dipole interaction potential energy diverges along the asymptotes of the real-space hyperbolic opening angle. Our findings allow us to extend classical and quantum interactions between dipoles, typically strictly confined to the near-field, beyond several free-space MIR wavelengths. We use $α$-MoO$_3$ as a representative material, but this mechanism is not limited to the MIR: it is general to anisotropic media across the whole electromagnetic spectrum.

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