Dual-core Photonic Crystal Fiber in the Terahertz Band of Cancer Cell Biodetection Sensor

Jinpei Wang; She Li; Han Ding; Yingying Song

doi:10.6919/ICJE.202503_11(3).0004

Authors

Jinpei Wang
She Li
Han Ding
Yingying Song

DOI:

https://doi.org/10.6919/ICJE.202503_11(3).0004

Keywords:

Photonic Crystal Fibers; Terahertz; Biosensor.

Abstract

Terahertz waves are used in non-destructive testing and biosensing due to their special transparency and safety, while photonic crystal fibers are used to fabricate various optical devices due to their unique optical transmission characteristics. This article studies a dual core terahertz photonic crystal fiber biological detection sensor, which introduces elliptical air holes between two fiber cores, and the cladding is composed of elliptical air holes of the same size arranged in a hexagonal pattern. Using finite element method for research, normal blood cells and cancerous blood cells are used as test objects to study and analyze the coupling length and coupling length ratio of optical fibers in the frequency range of 0.5THz-1.1THz. The results show that by optimizing the structural parameters of photonic crystal fibers, a shorter coupling length of 182.27 μm and a normalized output power change of 91.26% were obtained, which has important application potential in the fields of biosensing and medical detection.

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