Design of Refractive Index Sensors Based on Valley Photonic Crystal Mach-Zehnder Interferometer.

ABSTRACT: The refractive index is an important optical property of materials which can be used to understand the composition of materials. Therefore, refractive index sensing plays a vital role in biological diagnosis and therapy, material analysis, (bio)chemical sensing, and environmental monitoring. Conventional optical refractive index sensors based on optical fibers and ridge waveguides have relatively large sizes of a few millimeters, making them unsuitable for on-chip integration. Photonic crystals (PCs) have been used to significantly improve the compactness of refractive index sensors for on-chip integration. However, PC structures suffer from defect-introduced strong scattering, resulting in low transmittance, particularly at sharp bends. Valley photonic crystals (VPCs) can realize defect-i

SUBMITTER: Li Y 

PROVIDER: S-EPMC12157726 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature