Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 24, Issue 3, Pages 1395-1402Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2005.863333
Keywords
biochemical sensors; biosensors; integrated optics; microcavity; microresonator; microring; microring resonator; optical waveguides; ridge waveguides; sensors; waveguide
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Microring resonators can be exploited for biochemical sensing applications. To gain a better understanding of the design and optimization of microring sensors, the authors analytically derive the detection limit and the sensitivity. Other important parameters, including the ON-OFF contrast ratio and the signal-to-noise ratio (SNR), are also considered. In this paper, the combination of two sensing mechanisms and two sensing schemes are analyzed. These calculations provide a guideline for determining the microring geometry to satisfy the desired sensing requirements. In addition, the results can provide insights on how to enhance the sensitivity and lower the detection limit.
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