On-chip single nanoparticle detection using ultra-high-Q whispering gallery microresonator

Lan Yang; Jiangang Zhu; Sahin Kaya Ozdemir; Lina He; Yunfeng Xiao; Lin Li; Da-Ren Chen

doi:10.1117/12.850662

28 April 2010 On-chip single nanoparticle detection using ultra-high-Q whispering gallery microresonator

Lan Yang, Jiangang Zhu, Sahin Kaya Ozdemir, Lina He, Yunfeng Xiao, Lin Li, Da-Ren Chen

Proceedings Volume 7682, Photonic Microdevices/Microstructures for Sensing II; 76820B (2010) https://doi.org/10.1117/12.850662
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

Whispering gallery mode (WGM) optical microcavities trap light in micro-scale volumes by continuous total internal reflection which leads to enhancement of light intensity within a confined region and longer photon lifetime. Consequently, light-matter interaction is enhanced making the WGM resonator an extremely sensitive platform for the detection of perturbations in and around the resonator. Here, we report mode-splitting in monolithic ultra-high-Q WGM microcavities for real-time and in-situ detection of single nanoparticles. We investigate experimentally and theoretically particle detection and sizing at single nanoparticle resolution using the mode-splitting technique. Theoretical calculations are in good agreement with the experimental results. The mode-splitting effect provides a 'self-reference sensing' technique that can overcome the limitations of current resonator-based sensors and in the meantime keep the advantages offered by resonant structures for high-performance sensing.

Citation Download Citation

Lan Yang, Jiangang Zhu, Sahin Kaya Ozdemir, Lina He, Yunfeng Xiao, Lin Li, and Da-Ren Chen "On-chip single nanoparticle detection using ultra-high-Q whispering gallery microresonator", Proc. SPIE 7682, Photonic Microdevices/Microstructures for Sensing II, 76820B (28 April 2010); https://doi.org/10.1117/12.850662

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