论文标题
低对称性吹散勇士晶体中的辐射传热
Radiative heat transfer in low-symmetry Bravais crystal
论文作者
论文摘要
在过去的几年中，晶体内的对称性破裂引起了广泛的关注，因为它可以改善光传播的控制。特别是，低对称性吹牛的晶体可以支持在热光子学中具有巨大潜力的剪切偏振子。在这项工作中，我们报告了基于低对称性Bravais晶体介质（\ b {eta} -GA2O3）的扭曲引起的近场热控制系统。此类晶体板之间的近场热辐射（NFTR）比黑体限制大四个数量级，超过了其他传统介电材料的NFTR。此外，我们表明该晶体可以作为扭曲引起的近场热控制的绝佳平台。由于固有的剪切效果，低对称性Bravais晶体支持的扭曲诱导的调制超过了高对称性晶体。我们进一步阐明了剪切效果如何影响由双曲线和椭圆极偏振子支撑的扭曲诱导的热辐射调制，并表明剪切效应显着增强了由椭圆极化模式引起的扭曲诱导的热控制。这些结果为低对称材料（包括地质矿物质，公共氧化物和有机晶体）的热辐射控制开辟了新的方向。
Over the last few years, broken symmetry within crystals has attracted extensive attention since it can improve the control of light propagation. In particular, low-symmetry Bravais crystal can support shear polaritons which has great potential in thermal photonics. In this work, we report a twist-induced near-field thermal control system based on the low-symmetry Bravais crystal medium (\b{eta}-Ga2O3). The near-field thermal radiation (NFTR) between such crystal slabs is nearly four orders of magnitude larger than the blackbody limit, exceeding the NFTR from other traditional dielectric materials. Moreover, we show that this crystal can serve as an excellent platform for twist-induced near-field thermal control. Due to the intrinsic shear effect, the twist-induced modulation supported by low-symmetry Bravais crystal exceeds that by high-symmetry crystal. We further clarify how the shear effect affects the twist-induced thermal-radiation modulation supported by hyperbolic and elliptical polaritons and show that the shear effect significantly enhances the twist-induced thermal control induced by the elliptical polariton mode. These results open new directions for thermal-radiation control in low-symmetry materials, including geological minerals, common oxides, and organic crystals.
