title: On-chip integrated differential optical microring refractive index sensing platform based on a laminar flow scheme.
abstract: We propose an on-chip integrated differential optical microring refractive index sensing platform which leverages laminar flow conditions. Close spacing between a sensing and a reference resonator, and sharing the same microfluidic channel allows the two resonators to experience similar environmental disturbances, such as temperature fluctuations and fluidic-induced transients, achieving reliable and sensitive sensing performance. We obtain a noise floor of 80.0 MHz (0.3 pm) and a bulk refractive index sensitivity of 17.0 THz per refractive index unit (RIU) (64.2 nm/RIU), achieving a limit of detection of 1.4×10(-5) RIU in a 30 min and an 8°C window.
authors.forename: Dongwan
authors.initials: D
authors.lastname: Kim
authors.forename: Paula
authors.initials: P
authors.lastname: Popescu
authors.forename: Mark
authors.initials: M
authors.lastname: Harfouche
authors.forename: Jacob
authors.initials: J
authors.lastname: Sendowski
authors.forename: Maria-Eleni
authors.initials: ME
authors.lastname: Dimotsantou
authors.forename: Richard C
authors.initials: RC
authors.lastname: Flagan
authors.forename: Amnon
authors.initials: A
authors.lastname: Yariv
mesh_terms: D056656:Lab-On-A-Chip Devices; D055620:Optical Phenomena; D012031:Refractometry / Q000295:instrumentation*; D013997:Time Factors; D014867:Water
chemical_list: D014867:Water