Giant enhancement of the Goos-Hänchen shift by hyperbolic shear polaritons with beta-phase Ga2O3 in the mid-infrared spectrum

IF 2.9 3区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-09-01 DOI:10.1016/j.photonics.2025.101453

Lu Yang, Xiongwen Chen, Chang Liu, Wang Zeng, Xinwu Liu, Zihao Liu

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引用次数: 0

Abstract

In this paper, we theoretically investigate the Goos-Hänchen (GH) shift in an Otto configuration based on beta-phase Ga₂O₃ (bGO). The study shows that when TM-polarized light is incident, hyperbolic shear polaritons (HShPs) can induce a significant GH shift in the mid-infrared range. The significant GH shift in reflection is caused by local phase changes at the interface, which result from the excitation of HShPs. The magnitude and sign of the GH shift vary with device rotation and air gap thickness. By selecting appropriate air gap thickness and angle of incidence, a GH shift up to

2000 λ

can be achieved near the angle of incidence where the sign changes. Utilizing the tunable GH shift, we design an anisotropic refractive index sensor, providing theoretical guidance for potential industrial applications. Furthermore, our results indicate that the tunable GH shift method based on prism coupling has significant potential applications in biosensing, beam alignment, and optical detection.

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β相Ga2O3在中红外光谱中双曲剪切极化子对Goos-Hänchen位移的显著增强

在本文中，我们从理论上研究了基于β相Ga₂O₃（bGO）的Otto构型中的Goos-Hänchen （GH）移位。研究表明，当tm偏振光入射时，双曲剪切极化子（HShPs）可以在中红外范围内引起明显的GH位移。反射中显著的GH位移是由界面处的局部相位变化引起的，这是由HShPs激发引起的。GH位移的大小和符号随器件旋转和气隙厚度的变化而变化。通过选择合适的气隙厚度和入射角，可以在符号变化的入射角附近实现高达2000λ的GH位移。利用可调的GH位移，我们设计了一个各向异性折射率传感器，为潜在的工业应用提供了理论指导。此外，我们的研究结果表明，基于棱镜耦合的可调谐GH位移方法在生物传感、光束对准和光学检测方面具有重要的潜在应用前景。

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来源期刊

Photonics and Nanostructures-Fundamentals and Applications 工程技术-材料科学：综合

CiteScore

5.00

自引率

3.70%

发文量

审稿时长

62 days

期刊介绍： This journal establishes a dedicated channel for physicists, material scientists, chemists, engineers and computer scientists who are interested in photonics and nanostructures, and especially in research related to photonic crystals, photonic band gaps and metamaterials. The Journal sheds light on the latest developments in this growing field of science that will see the emergence of faster telecommunications and ultimately computers that use light instead of electrons to connect components.