High sensitivity multitasking non-reciprocity sensor using the photonic spin Hall effect

A non-reciprocity sensor based on a layered structure with multitasking is proposed, which realizes biological detection and angle sensing. Through an asymmetrical arrangement of different dielectrics, the sensor obtains non-reciprocity on the forward and backward scales, thus achieving multi-scale sensing in different measurement ranges. The structure sets the analysis layer. Injecting the analyte into the analysis layers by locating the peak value of the photonic spin Hall effect (PSHE) displacement, cancer cells can accurately be distinguished from normal cells via refractive index (RI) detection on the forward scale. The measurement range is 1.569 similar to 1.662, and the sensitivity (S) is 2.97x10(-2) m/RIU. On the backward scale, the sensor is able to detect glucose solution with 0 similar to 400 g/L concentrations (RI= 1.3323 similar to 1.38), with S= 1.16x10(-3) m/RIU. When the analysis layers are filled with air, high-precision angle sensing can be achieved in the terahertz range by locating the incident angle of the PSHE displacement peak; 30 degrees similar to 45 degrees, and 50 degrees similar to 65 degrees are the detection ranges, and the highest S can reach 0.032 THz/degrees. This sensor contributes to detecting cancer cells and biomedical blood glucose and offers a new way to the angle sensing. (c) 2022 Optica Publishing Group

Automated summary

This article proposes a non-reciprocity sensor based on a layered structure with multitasking, which achieves biological detection and angle sensing. By asymmetrically arranging different dielectrics, the sensor obtains non-reciprocity on the forward and backward scales, enabling multi-scale sensing in different measurement ranges. The sensor is significant in detecting cancer cells and biomedical blood glucose, and it offers a new approach to angle sensing.