Highly Efficient Asymmetric Dual Refractive Index D-type Photonic Crystal Fiber Surface Plasmon Resonance Sensor

To achieve simultaneous detection of dual refractive index (RI), an asymmetric dual RI D-type photonic crystal fiber (PCF) surface plasmon resonance (SPR) sensor is proposed. The PCF sensor adopts titanium dioxide (TiO2) and zirconium oxide (ZrO2) as the dielectric layer materials on both sides to form an asymmetric structure, achieving simultaneous detection of both analytes. The use of silver can promote the excitation of surface plasmons and enhance the detection sensitivity of the optical fiber sensor. Furthermore, the wavelength sensitivity of the dual channel reaches 11,200 nm/RIU and 14,300 nm/RIU with the RI range of 1.33-1.40. Meanwhile, according to its practical application, a detailed equipment construction process is designed. This PCF sensor is proposed to provide a new method for the simultaneous detection of dual RI.

Automated summary

An asymmetric dual refractive index D-type photonic crystal fiber surface plasmon resonance sensor is proposed for simultaneous detection of two analytes. The sensor utilizes titanium dioxide and zirconium oxide as dielectric layer materials to achieve an asymmetric structure. The use of silver enhances the detection sensitivity, and the sensor exhibits wavelength sensitivity within the refractive index range of 1.33-1.40.