Active Control of Temperature‐Sensitive GaN‐Graphene van der Waals Heterojunctions Integrated Metasurfaces: A Platform for Multifunctional Micro–Nanophotonic Devices

• DOI: 10.1002/adom.202401333
• Publication Date: 2024-07-22T09:55:55Z
• Authors: G. F. Wu; F. P. Yan; L. J. Liang; W. Wang; T. Li; Z. H. Li; X. Yan; R. Zhang; H. Y. Yao; Z. Q. Wang; X. F. Hu; L Wang
• Keywords: Nanophotonics; Nanogenerator

Abstract Van der Waals (vdW) heterojunctions composed of GaN/graphene have high transmittance and excellent carrier transport properties. The combination multidimensional hybrid with metasurfaces can open up many fascinating prospects for novel optical components over a broad range the electromagnetic spectrum. This work experimentally demonstrates multifunctional temperature‐sensitive meta‐device based on vdW integrated metasurface. Notably, it is discovered that conductivity increases rapidly when excited by thermal signal, resulting in significant change relative phase retardation as well amplitude modulation an incident THz wave. Then continuous wavelet transform used instead traditional Fourier transform, two‐dimensional coefficient card built to achieve fast detection wider temperature. Simultaneously, variation temperature dynamically controls contributions multipoles, eventually determining active switching exotic anapoles extreme non‐radiative confinement highly radiative electric dipoles. offers possibility designing chip‐scale tuning devices promotes potential application micro‐nanophotonic sensors, terahertz modulators, dynamic near‐field imaging.