Optimized optical "tractor beam" for core-shell nanoparticles

Neng Wang*, Wanli Lu, Tsz Fai Jack NG, Zhifang Lin

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

32 Citations (Scopus)


It is known that core-shell subwavelength nanoparticles consisting of a dielectric shell and a metallic core can simultaneously support electric and magnetic dipolar resonances, which enhance forward scattering and suppress backward scattering. This creates favorable conditions for optical tractor beam applications. Using the generalized Lorenz-Mie theory and Maxwell stress tensor formulation, we demonstrate how optical pulling forces can be induced and optimized by first-order Bessel beams with appropriate polarization. The transverse stability of the core-shell nanoparticle under ambient damping is also verified by linear stability analysis and dynamical simulation.

Original languageEnglish
Pages (from-to)2399-2402
Number of pages4
JournalOptics Letters
Issue number8
Publication statusPublished - 15 Apr 2014

Scopus Subject Areas

  • Atomic and Molecular Physics, and Optics


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