[15a-PA3-1~11] 3.8 Optical measurement, instrumentation, and sensor

▲ [15a-PA3-9] Biosensor Based on a Photonic Crystal Cavity Resonator

〇(DC)Amrita Sana¹, Keita Honzawa¹, Yoshiteru Amemiya¹, Shin Yokoyama¹ (1.Hiroshima Univ.)

Keywords:Biosensor,Photonic Crystal

We have studied both cavity and defect type resonators for biosensing. In the cavity type, resonator confines the light and light-biomolecule interaction occurs. However, in the defect type structure only the evanescent light are in the resonator region and makes interaction with biomolecules. The sensing ability of both structures has measured using sucrose solution at different concentration. The resonance wavelength has shifted linearly with changing the sucrose concentration and device has shown very high sensitivity of 2714 nm/RIU for the cavity type. The cavity type resonator has 4 times large wavelength shift than defect type.