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Different from the conventional whispering-gallery-mode sensing using reactive interaction, the dissipative interaction is proposed and demonstrated to detect single nanoparticles which are lossy and with an ultra-small real part of the polarizability.
Detection of single nanoscale objects is highly desirable for applications in various fields, such as in early-stage diagnosis of human diseases and in environmental monitoring. High-Q microcavities, which can significantly enhance light-matter interactions, provide ideal platforms for label-free, ultrasensitive detection of single nano- objects. In the first part of this talk, we report the experimental...