Using the single-scatterer-induced coupling mechanism of a pair of counterpropagating high- whispering-gallery modes (WGMs), we investigate the highly sensitive detection of single nonspherical nanoparticles. The nonspherical particle may produce distinct frequency splitting and additional damping for TE and TM WGMs. This polarization-dependent effect allows for studying the orientation of single biomolecule, molecule-molecule interaction on the microcavity surface, and possibly distinguishing different inner configurations of similar biomolecules.
Polarization-dependent detection of cylinder nanoparticles with mode splitting in a high- whispering-gallery microresonator
Xu Yi, Yun-Feng Xiao, Yan Li, Yong-Chun Liu, Bei-Bei Li, Zhao-Pei Liu, Qihuang Gong; Polarization-dependent detection of cylinder nanoparticles with mode splitting in a high- whispering-gallery microresonator. Appl. Phys. Lett. 15 November 2010; 97 (20): 203705. https://doi.org/10.1063/1.3520138
Download citation file: