Abstract: We investigated a wavelength-controlled Bloch surface wave high-performance biosensor. Based on impedance matching method, we optimized the system parameters of the biosensor,  and applied it to detection of glucose solution mass concentration. The biosensor was composed of a grating coupled with one-dimensional photonic crystal structure. Strong localized Bloch surface waves could be excited near the grating structure. The results show that the quality factor of Bloch surface waves can be optimized by adjusting the thickness of the buffer layer, the periods of the photonic crystal, and the incident angle, thereby improving the sensing performance of biosensors. Combining the high-quality factor and high wavelength sensitivity of Bloch surface waves, the sensing performance of this biosensor in glucose mass concentration detection can reach 708.1(g/mL)^-1.

Key words: Bloch surface wave, biosensor, grating structure, photonic crystal