发表机构
Macao Institute of Materials Science and Engineering (MIMSE), Sino-Luso Joint Laboratory for Optoelectronics, Macau University of Science and Technology; Macau University of Science and Technology Zhuhai MUST Science and Technology Research Institute（澳门大学科学技术学院澳门科技大学中葡联合光学电子学实验室; 澳门科技大学珠海研究院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出利用非厄米耗散作为额外自由度，在扭转α-MoO3/α-V2O5异质结构中调控双曲剪切极化激元，实现剪切度连续调节与可逆开关，并演示了基于此的二进制编码方案。
AI 中文摘要
双曲剪切极化激元（HShPs）代表了一类独特的各向异性极化激元态，通过不对称的动量空间色散实现定向的亚波长光操控，而在扭转体系中对其的控制迄今主要依赖于几何和光谱参数。在此，我们引入非厄米耗散作为扭转范德华异质结构中调控HShPs的一个额外自由度。在等频轮廓紧密匹配但介电损耗不同的扭转{\alpha}-MoO3/{\alpha}-V2O5异质结构中，耗散修饰了复混合极化激元态，从而调节了由此产生的动量空间和实空间不对称性。近场红外成像结合解析建模和全波仿真揭示了剪切响应随扭转角、激发频率、层厚度和衬底介电环境的演化。材料耗散与介电屏蔽之间的相互作用使得剪切度得以连续调节，并可在剪切开启与关闭状态之间可逆切换。此外，我们展示了一种基于耗散控制的剪切态切换的概念验证型二进制状态编码方案。我们的工作将非厄米耗散确定为扭转极化激元体系中的一个额外控制参数，扩展了可重构中红外纳米光子学的可用设计空间。
英文摘要
Hyperbolic shear polaritons (HShPs) represent a distinctive class of anisotropic polaritonic states that enable directional subwavelength light manipulation through asymmetric momentum-space dispersion, while their control in twisted systems has so far relied mainly on geometric and spectral parameters. Here, we introduce non-Hermitian dissipation as an additional degree of freedom for tuning HShPs in twisted van der Waals heterostructures. In twisted α-MoO3/α-V2O5 heterostructures with closely matched isofrequency contours but distinct dielectric losses, dissipation modifies the complex hybrid polaritonic states and thereby tunes the resulting momentum-space and real-space asymmetry. Near-field infrared imaging combined with analytical modeling and full-wave simulations reveals the evolution of the shear response with twist angle, excitation frequency, layer thickness, and substrate dielectric environment. The interplay between material dissipation and dielectric screening enables continuous regulation of the shear degree and reversible switching between shear-off and shear-on states. Furthermore, we demonstrate a proof-of-concept binary-state encoding scheme based on dissipation-controlled shear-state switching. Our work identifies non-Hermitian dissipation as an additional control parameter in twisted polaritonic systems, expanding the available design space for reconfigurable mid-infrared nanophotonics.
