Journal
OPTICS LETTERS
Volume 40, Issue 17, Pages 4106-4109Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.40.004106
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Funding
- National Science Foundation (NSF) [1152623]
- Div Of Biological Infrastructure
- Direct For Biological Sciences [1152623] Funding Source: National Science Foundation
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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 x 10(-5) RIU in a 30 min and an 8 degrees C window. (C) 2015 Optical Society of America
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