Sensitivity is very important while designing any biosensor. We present a tunable and highly sensitive absorbing metasurface for sensing hemoglobin biomolecules. The metasurface is based on phase change material made using different alloy combinations of Ge₂Sb₂Te₅ (GST). Hemoglobin biomolecules are sensed using the perfect absorbing metasurfaces. Three metasurfaces made up of C-shape split-ring resonator and thin wire are investigated. The biosensor is investigated for different phases of GST material and tuning is observed for amorphous GST (aGST) and crystalline GST (cGST). The results are presented in the form of absorption, electric field, and magnetic field. The absorption results for different angles show that the metasurface is angle sensitive. The results are also observed for different geometrical parameters like GST material thickness and gold metasurface thickness. The proposed perfect absorbing sensitive metasurface based on phase-changing material can be used for sensing hemoglobin in biomedical applications.

在设计任何生物传感器时，灵敏度都非常重要。我们提出了一种可调谐且高度敏感的吸收超表面，用于感测血红蛋白生物分子。超表面基于使用 Ge ₂ Sb ₂ Te _{5 的}不同合金组合制成的相变材料(消费税)。使用完美的吸收超表面来检测血红蛋白生物分子。研究了由 C 形开口环谐振器和细线组成的三个超表面。针对 GST 材料的不同阶段研究了生物传感器，并观察了无定形 GST (aGST) 和结晶 GST (cGST) 的调谐。结果以吸收、电场和磁场的形式呈现。不同角度的吸收结果表明超表面是角度敏感的。还观察了不同几何参数的结果，如 GST 材料厚度和金超表面厚度。所提出的基于相变材料的完美吸收敏感超表面可用于传感生物医学应用中的血红蛋白。