期刊
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
卷 28, 期 2, 页码 -出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSTQE.2021.3105132
关键词
Microsensors; cavity resonators; position sensitive particle detectors
资金
- National Natural Science Foundation of China [61805103]
- Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program [2019BT02X105]
- Youth Top-notch Scientific and Technological Innovation Talent of Guangdong Special Support Plan [2019TQ05X136]
- Fundamental Research Funds for the Central Universities [2019NTST31]
In this study, the mass sensitivities of mechanical oscillations in a microcavity are theoretically discussed and explored via simulations. The results provide an effective guideline for sensitivity optimization in microcavity design for single nanoparticle mass detection.
Single nanoparticle detection is demanding in fields such as early-stage diagnostics, environmental monitoring and biochemical researches. Microcavities are becoming excellent platforms for ultrasensitive detection due to the extremely strong enhancement of light-matter interactions. However, the analytes to be detected will introduce optical losses, which eventually spoils the detection limit of the optical sensor. The strong light confinement enables optical induced mechanical oscillations that is also sensitive to analyte attachments and can thus be applied as an alternative sensing signal in microcavity sensors. In this work, the mass sensitivities of the mechanical oscillations of a microcavity are theoretically discussed. The sensitivity dependence on different modes, analyte sensing position and microcavity structure are explored via finite-element-method simulations, which are consistent with theoretical predictions. Our results provide an effective guideline for the sensitivity optimization during microcavity design aiming for single nanoparticle mass detection.
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