Dressing plasmon resonance with particle-microcavity architecture for efficient nano-optical trapping and sensing

• Main Authors: Zhang, Haixi, Zhou, Yanyan, Yu, Xia, Luan, Feng, Xu, Jianbin, Ong, Hock-Chun, Ho, Ho-Pui
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2014
• Subjects: DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics
• Online Access: https://hdl.handle.net/10356/104041; http://hdl.handle.net/10220/19483
• Institution: Nanyang Technological University

We propose a particle-microcavity scheme for efficient optical trapping and sensing. When a resonant plasmonic nanoparticle (NP) is placed inside a microcavity with high Q-factor, sensitivity is enhanced in the far-field extinction while near-field around the NP is barely affected. Stable near-field and high sensitivity for optical trapping and ultrasensitive detection of nanosized targets are therefore realized simultaneously. Such a particle-microcavity system opens up a new hybrid nanophotonic device platform that combines the unique merits of conventional and plasmonic integrated photonics.