685 citations · 6.5k across the 94 of their papers we have counts for
6 papers · 2 filters
Tapered nanofiber trapping of high-refractive-index nanoparticles
Jon D. Swaim, Joachim Knittel, Warwick P. Bowen
A nanofiber-based optical tweezer is demonstrated. Trapping is achieved by combining attractive near-field optical gradient forces with repulsive electrostatic forces. Silica-coate…
Back-scatter based whispering gallery mode sensing
Joachim Knittel, Jon D. Swaim, David L. McAuslan +2
Whispering gallery mode biosensors allow selective unlabelled detection of single proteins and, combined with quantum limited sensitivity, the possibility for noninvasive realtime…
Optomechanical parameter estimation
Shan Zheng Ang, Glen I. Harris, Warwick P. Bowen +1
We propose a statistical framework for the problem of parameter estimation from a noisy optomechanical system. The Cramér-Rao lower bound on the estimation errors in the long-time…
Subdiffraction-limited quantum imaging within a living cell
Michael A. Taylor, Jiri Janousek, Vincent Daria +4
We report both sub-diffraction-limited quantum metrology and quantum enhanced spatial resolution for the first time in a biological context. Nanoparticles are tracked with quantum…
Detection of Nanoparticles with a Frequency Locked Whispering Gallery Mode Microresonator
Jon D. Swaim, Joachim Knittel, Warwick P. Bowen
We detect 39 nm x 10 nm gold nanorods using a microtoroid stabilized via the Pound-Drever-Hall method. Real-time detection is achieved with signal-to-noise ratios up to 12.2. These…
Optical lock-in particle tracking in optical tweezers
Michael A Taylor, Joachim Knittel, Warwick P Bowen
We demonstrate a lock-in particle tracking scheme in optical tweezers based on stroboscopic modulation of an illuminating optical field. This scheme is found to evade low frequency…