We put forward a multimode slotted nanobeam cavity (MM-SPCNC) supporting both air and dielectric modes through a specific design of band properties. Dual-parameter detection is realized by jointly measuring the resonance wavelength shifts of both air and dielectric modes. The proposed sensor is robust against external interference and shows higher sensitivity compared with other dual-parameter sensors. The maximum external interference ranges of the proposed sensor are 4.82×10⁻⁶ and 0.05 for refractive index (RI) and temperature (T), respectively, which indicates that the sensor can effectively resist against external interference. The RI and T sensitivities of the fundamental air mode are 421 nm/RIU and 58 pm/K respectively, whereas those of the fundamental dielectric mode are 706 nm/RIU and 46 pm/K respectively. The proposed sensor thus represents a promising candidate for future multifunctional and lab-on-chip sensing applications.

我们提出了一种通过带隙特性的特定设计同时支持空气和介电模的多模缝隙纳米束腔（MM-SPCNC）。通过共同测量空气模式和介电模式的共振波长偏移，可以实现双参数检测。与其他双参数传感器相比，该传感器具有较强的抗外部干扰能力，并具有更高的灵敏度。建议的传感器的最大外部干扰范围为4.82×10 ^-6折射率（RI）和温度（T）分别为0.05和0.05，这表明该传感器可以有效抵抗外界干扰。基本空气模式的RI和T灵敏度分别为421 nm / RIU和58 pm / K，而基本介电模式的RI和T灵敏度分别为706 nm / RIU和46 pm / K。因此，提出的传感器代表了未来多功能和芯片实验室传感应用的有希望的候选者。