▎ 摘　　要

NOVELTY - The sensor has a structure formed with a surface defect cavity. A periodic photonic crystal is formed with high refractive index material (A) and low refractive index material (B). The surface defect cavity is arranged with an absorbent medium graphene (C). A low index refraction material detects sample solution to be measured through a sensor surface, where a relationship between peak wavelength and a sample refractive index is obtained to monitor tested sample refractive index by detecting resonance peak wavelength shift. USE - Graphene absorption medium surface defect cavity photonic crystal refractive index sensor. ADVANTAGE - The sensor is introduced into a defect cavity absorption medium graphite to obtain resonance light signal, so that defects formed in the cavity is gradually absorbed in an efficient manner. DESCRIPTION OF DRAWING(S) - The drawing shows a sectional perspective view of a graphene absorption medium surface defect cavity photonic crystal refractive index sensor. High refractive index material (A) Low refractive index material (B) Absorbent medium graphene (C)