On-chip single nanoparticle detection and sizing by mode splitting in an ultrahigh- Q microresonator

By Jiangang Zhu, Ş. Özdemir, Yun-Feng Xiao, Lin Li, Lina He, Da-Ren Chen, Lan Yang. 2009

1,078 citations recorded by the source corpus.

The ability to detect and size individual nanoparticles with high resolution is crucial to understanding the behaviour of single particles and effectively using their strong size-dependent properties to develop innovative products. We report realtime, in situ detection and sizing of single nanoparticles, down to 30 nm in radius, using mode splitting in a monolithic ultrahigh-quality-factor (Q) whispering-gallery-mode microresonator. Particle binding splits a whispering-gallery mode into two spectrally shifted resonance modes, forming a self-referenced detection scheme. This technique provides superior noise suppression and enables the extraction of accurate particle size information with a single-shot measurement in a microscale device. Our method requires neither labelling of the particles nor a priori information on their presence in the medium, providing an effective platform to study nanoparticles at single-particle resolution. With the rapid progress in nanotechnology, nanoparticles of different materials and sizes have been synthesized and engineered as key components in various applications ranging from solar cell

Subfields: Atomic and Molecular Physics, and Optics, Biomedical Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/16736179955c416c2e862b6d98cf90ad215103b2

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In Atomic and Molecular Physics, and Optics

In Biomedical Engineering

In Electrical and Electronic Engineering

Citations in the corpus

Breaking the Loss Limitation of On-chip High-confinement Resonators (2016, background): “Low propagation loss silicon nitride (Si3N4) ring resonators are critical for a variety of photonic applications such as efficient and compact on-chip optical routing [1,2], low threshold frequency combs [3-5], optical clocks [6] and high precision sensing [7-11].”
Hybrid quantum circuits: Superconducting circuits interacting with other quantum systems (2012, background): “, 2006), and microtoroidal cavities (Aoki et al., 2006; Dayan et al., 2008; Zhu et al., 2010; Özdemir et al., 2011).”
Whispering gallery mode sensors (2015, background): “Undoubtedly, the most significant multimodal sensing mechanism used is that based on the measurement of the frequency splitting between two coupled WGMs [185].”