Optical trapping of dielectric nanoparticles in resonant cavities

Journal Article · Mon Nov 15 00:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.053819· OSTI ID:21528735

Juejun, Hu ^[1]; Shiyun, Lin; Crozier, Kenneth ^[2]; Kimerling, Lionel C ^[1]

---

1. Microphotonics Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
2. School of Engineering and Applied Science, Harvard University, Cambridge, Massachusetts 02138 (United States)

We theoretically investigate the opto-mechanical interactions between a dielectric nanoparticle and the resonantly enhanced optical field inside a high Q, small-mode-volume optical cavity. We develop an analytical method based on open system analysis to account for the resonant perturbation due to particle introduction and predict trapping potential in good agreement with three-dimensional (3D) finite-difference time-domain (FDTD) numerical simulations. Strong size-dependent trapping dynamics distinctly different from free-space optical tweezers arise as a consequence of the finite cavity perturbation. We illustrate single nanoparticle trapping from an ensemble of monodispersed particles based on size-dependent trapping dynamics. We further discover that the failure of the conventional dipole approximation in the case of resonant cavity trapping originates from a new perturbation interaction mechanism between trapped particles and spatially localized photons.

• OSTI ID: 21528735
• Journal Information: Physical Review. A, Vol. 82, Issue 5; Other Information: DOI: 10.1103/PhysRevA.82.053819; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
ANALYTIC FUNCTIONS
CAVITY RESONATORS
COMPUTERIZED SIMULATION
DIELECTRIC MATERIALS
DIPOLES
DISTURBANCES
FINITE DIFFERENCE METHOD
NANOSTRUCTURES
PARTICLES
PHOTONS
SYSTEMS ANALYSIS
THREE-DIMENSIONAL CALCULATIONS
TRAPPING
BOSONS
CALCULATION METHODS
ELECTRONIC EQUIPMENT
ELEMENTARY PARTICLES
EQUIPMENT
FUNCTIONS
ITERATIVE METHODS
MASSLESS PARTICLES
MATERIALS
MATHEMATICAL SOLUTIONS
MULTIPOLES
NUMERICAL SOLUTION
RESONATORS
SIMULATION