[21p-P16-1~12] 3.15 Silicon photonics

▲ [21p-P16-4] Label Free Biosensor Based on Photonic Crystal Resonator

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

Keywords:Biosensor, Photonic crystal.

In this work, we have studied both cavity and defect type resonators with different center hole diameter. The experimental results of cavity type shows larger wavelength shift than the defect type. Moreover, larger cavity offers more resonance wavelength shift than small cavity type device. The experimental results shows for the large center hole, the resonance wavelength shift is not linear possibly due to bubbles generated inside the cavity. The small cavity i.e. center hole 400 nm and 430 nm, the resonance wavelength shift linearly changed with sucrose concentration. In our measured results the abnormal( center hole is connected to surrounding holes) cavity (450 nm) has about 1.7 times large wavelength shift than small cavity (cavity size 430 nm) at 0.1 % sucrose concentration and we confirmed that 2.3 times large wavelength shift of large cavity type structure than defect type structure at 0.1 % sucrose concentration.
We found that the cavity type PhC resonator has large sensitivity than that of the defect type device due to large sensing area.