Yager Tom, Chikvaidze George, Wang Qin, Fu Ying
Institute of Solid State Physics, University of Latvia, LV-1063 Riga, Latvia.
RISE Research Institutes of Sweden AB, Box 1070, SE-164 25 Kista, Sweden.
Nanomaterials (Basel). 2023 Jul 20;13(14):2113. doi: 10.3390/nano13142113.
We integrated graphene with asymmetric metal metasurfaces and optimised the geometry dependent photoresponse towards optoelectronic molecular sensor devices. Through careful tuning and characterisation, combining finite-difference time-domain simulations, electron-beam lithography-based nanofabrication, and micro-Fourier transform infrared spectroscopy, we achieved precise control over the mid-infrared peak response wavelengths, transmittance, and reflectance. Our methods enabled simple, reproducible and targeted mid-infrared molecular sensing over a wide range of geometrical parameters. With ultimate minimization potential down to atomic thicknesses and a diverse range of complimentary nanomaterial combinations, we anticipate a high impact potential of these technologies for environmental monitoring, threat detection, and point of care diagnostics.
我们将石墨烯与不对称金属超表面集成在一起，并针对光电分子传感器设备优化了与几何形状相关的光响应。通过精心调整和表征，结合时域有限差分模拟、基于电子束光刻的纳米制造以及微傅里叶变换红外光谱，我们实现了对中红外峰值响应波长、透射率和反射率的精确控制。我们的方法能够在广泛的几何参数范围内实现简单、可重复且有针对性的中红外分子传感。由于具有低至原子厚度的最终最小化潜力以及多种互补的纳米材料组合，我们预计这些技术在环境监测、威胁检测和即时诊断方面具有很高的潜在影响力。
