Journal
OPTICS EXPRESS
Volume 25, Issue 26, Pages 33193-33201Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.25.033193
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Funding
- National Natural Science Foundation of China [61535010, 21605116, 61605172]
- National High Technological Research and Development Program of China [2014AA06A504]
- Science and Technology Department of Zhejiang Province [2016C33074]
- Natural Science Foundation of Zhejiang Province [LY16F050001]
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We report a refractive index sensing system with a high sensitivity of 1579 dB/RIU and a low refractive index detection limit of 9.7 x 10(-6) RIU. The sensing system was based on cascaded-microring resonators (CMRR) using intensity interrogation. The free spectrum range (FSR) for the reference ring was designed to be equal to the sensing ring. The sensing ring of the CMRR was modified with molecularly imprinted polymers (MIPs) for the detection of progesterone. The achieved limit of detection (LOD) was as low as 83.5 fg/mL. (C) 2017 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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