Abstract Metasurfaces have become one of the most prominent research topics in the field of optics owing to their unprecedented properties and novel applications on an ultrathin platform. By combining graphene with metasurfaces, electrical tunable functions can be achieved with fast tuning speed, large modulation depth, and broad tuning range. However, the tuning efficiency of hybrid graphene metasurfaces within the short‐wavelength infrared (SWIR) spectrum is typically low because of the small resonance wavelength shift in this wavelength range. In this work, through the integration of graphene and silicon metasurfaces that support quasi‐bound states in the continuum (quasi‐BIC), the critical coupling as well as transmittance spectrum tuning is experimentally demonstrated. The spectrum tuning is substantial even with less than 30 nm resonance wavelength shift thanks to the high quality factor of quasi‐BIC metasurfaces. The tunable transmittance spectrum is measured using Fourier transform infrared spectroscopy (FTIR) with a modified reflective lens to improve the accuracy, and the electrical tuning is realized utilizing the “cut‐and‐stick” method of ion gel. At the wavelength of 3.0 µm, the measured transmittance change (Δ T = T max − T min ) and modulation depth (Δ T / T max ) can reach 22.2% and 28.9%, respectively, under a small bias voltage ranging from −2 to +2 V. This work demonstrates an effective way of tuning metasurfaces within the SWIR spectrum, which has potential applications in optical modulation, reconfigurable photonic devices, and optical communications.

Ziqiang Cai

Xianzhe Zhang

Tushar Sanjay Karnik

Yihao Xu

Taeyoon Kim

Juejun Hu

Yongmin Liu

Advanced Optical Materials

先进光学材料的范围致力于光子学、等离子体激元学、超材料等方面的突破性发现和基础研究。以下是高级光学材料中涵盖的主题的非详尽列表：光子晶体非线性光学光学纳米结构光电子学光学器件、探测器和传感器全息光声材料光学数据存储微/纳米谐振器光波导。

The journal "Advanced Optical Materials" focuses on groundbreaking discoveries and fundamental research in the fields of photonics, plasmonics, and metamaterials. Topics covered include, but are not limited to: photonic crystals, nonlinear optics, optical nanostructures, optoelectronics, optical devices, detectors and sensors, holography, photoacoustic materials, optical data storage, micro/nano resonators, and optical waveguides.

《Advanced Optical Materials》期刊专注于光子学、等离子体激元学、超材料等领域的突破性发现和基础研究。期刊涵盖的主题包括但不限于：光子晶体、非线性光学、光学纳米结构、光电子学、光学器件、探测器和传感器、全息技术、光声材料、光学数据存储、微/纳米谐振器及光波导等。

Category	Quartile
材料科学	2
材料科学, 材料科学综合	2
材料科学, 光学	2

Electrically Tuning Quasi‐Bound States in the Continuum with Hybrid Graphene‐Silicon Metasurfaces

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