Abstract
We describe the design and the characterization of high- $Q$ coupled photonic crystal nanobeam cavities for biosensing with 3-D finite-difference time-domain simulation. The majority of optical field localizes in the slotted low-index area, which contributes to a strong light-matter interaction. By introducing a parabolic modulated radius tapering structure, a calculated high quality factor of $1.14\times 10^{7}$ has been obtained. Successive infiltrations by liquids with different refractive indices yield a high bulk sensitivity of 415 nm/RIU. A high figure of merit of 4122 and the ultra-compact sensing part of 11.2 $\mu \textrm {m}\times 0.8~\mu \text{m}$ are obtained, which is potentially an ideal platform for lab-on-chip sensors array.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
