High-sensitivity Goos-Hänchen shifts sensor in twisted bilayer graphene on hexagonal boron nitride

Siying Huang; Leyong Jiang; Zhiwei Zheng

doi:10.1117/12.2686933

27 November 2023 High-sensitivity Goos-Hänchen shifts sensor in twisted bilayer graphene on hexagonal boron nitride

Siying Huang, Leyong Jiang, Zhiwei Zheng

Proceedings Volume 12771, Advanced Sensor Systems and Applications XIII; 1277108 (2023) https://doi.org/10.1117/12.2686933
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Abstract

The present paper proposes a Surface Plasmon Resonance (SPR) sensor utilizing Twisted Bilayer Graphene (TBG)- Hexagonal Boron Nitride (hBN) heterostructures to enhance the Goos-Hänchen (GH) shift. The study presents a theoretical demonstration of the adjustability of GH shift via tuning the TBG twist angle, the number of TBG layers, and the thickness of hBN, respectively. The two-dimensional twisted bilayer graphene twist angle effectively promotes the sensitivity of the sensor. With a relative twist angle of 76.87°, the sensitivity of this sensor structure is remarkably enhanced to 1.8×10⁸ μm/RIU. The outcomes of this investigation offer a theoretical underpinning for the development of new high-sensitivity biosensors.

Citation Download Citation

Siying Huang, Leyong Jiang, and Zhiwei Zheng "High-sensitivity Goos-Hänchen shifts sensor in twisted bilayer graphene on hexagonal boron nitride", Proc. SPIE 12771, Advanced Sensor Systems and Applications XIII, 1277108 (27 November 2023); https://doi.org/10.1117/12.2686933

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