Design of a Slot Photonic Crystal Waveguide for Highly Sensitive Evanescent Field Absorption Sensing in Fluids

Description

The design of a highly sensitive sensor based on slot photonic crystal waveguide (slot-PCWG) is presented. These types of waveguides feature a hexagonal array of holes in a silicon slab, which are filled with SiO2. The waveguide is formed by removing elements from the regular photonic crystal grid in a row and embedding a slot in the center position. This concept allows a vast enhancement of the evanescent field ratio leading to a strong overlap between the field of the waveguide mode and the analyte. In the present work, we show that the sensitivity at constant slab thickness and waveguide-length of the slot-PCWG modes is greatly enhanced up to a factor of 7.6 compared to corresponding PCWGs modes or Si slab WGs.

Period	03 Oct 2019
Event title	The 4th Conference on MicroFluidic Handling Systems (MFHS 2019)
Event type	Conference
Location	NetherlandsShow on map