On-chip single nanoparticle detection and sizing by mode splitting in an ultrahigh- Q microresonator
Abstrak
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
Topik & Kata Kunci
Penulis (7)
Jiangang Zhu
S. Ozdemir
Yun-Feng Xiao
Lin Li
L. He
Da-Ren Chen
Lan Yang
Akses Cepat
- Tahun Terbit
- 2009
- Bahasa
- en
- Total Sitasi
- 1073×
- Sumber Database
- Semantic Scholar
- DOI
- 10.1038/nphoton.2009.237
- Akses
- Open Access ✓