In this article, we report a liquid sensing device based on a Ge–Sb–Se microring resonator (MRR) operating at a wavelength of 1550 nm. The transmission loss of the waveguide is 4.3 dB/cm, and the intrinsic Q factor of the MRR is 7.74 × 10⁴, with an extinction ratio of approximately 40 dB. By detecting the different concentrations of NaCl solutions, we observe that the sensitivity of our proposed device is approximately 123 nm/RIU, and the intrinsic limit of detection is approximately 3.24 × 10⁻⁴ RIU. Compared with the other materials, such as silicon, Si₃N₄, or polymer, the moderate refractive index (RI) of Ge₂₈Sb₁₂Se₆₀ glass allows it to obtain a high sensitivity and a high Q factor, while maintaining a strong confinement on the light field to avoid suffering from bending loss under a small bending radius, with a compact structure.

在本文中，我们报告了一种基于 Ge-Sb-Se 微环谐振器 (MRR) 工作在 1550 nm 波长的液体传感装置。波导的传输损耗为 4.3 dB/cm，MRR的固有Q因子为 7.74 × 10 ⁴，消光比约为 40 dB。通过检测不同浓度的 NaCl 溶液，我们观察到我们提出的装置的灵敏度约为 123 nm/RIU，检测的固有极限约为 3.24 × 10 ^-4 RIU。与硅、Si ₃ N ₄或聚合物等其他材料相比，Ge ₂₈ Sb ₁₂ Se ₆₀的中等折射率（RI）玻璃使其获得高灵敏度和高Q因子，同时保持对光场的强限制，避免在小弯曲半径下遭受弯曲损耗，结构紧凑。