@article {18828,
	title = {Developing a Stochastic Dynamic Programming Framework for Optical Tweezer-Based Automated Particle Transport Operations},
	journal = {Automation Science and Engineering, IEEE Transactions on},
	volume = {7},
	year = {2010},
	month = {2010/04//},
	pages = {218 - 227},
	abstract = {Automated particle transport using optical tweezers requires the use of motion planning to move the particle while avoiding collisions with randomly moving obstacles. This paper describes a stochastic dynamic programming based motion planning framework developed by modifying the discrete version of an infinite-horizon partially observable Markov decision process algorithm. Sample trajectories generated by this algorithm are presented to highlight effectiveness in crowded scenes and flexibility. The algorithm is tested using silica beads in a holographic tweezer set-up and data obtained from the physical experiments are reported to validate various aspects of the planning simulation framework. This framework is then used to evaluate the performance of the algorithm under a variety of operating conditions.},
	keywords = {holographic tweezer set-up, holography, infinite-horizon partially observable Markov decision process algorithm, Markov processes, motion planning framework, optical tweezer-based automated particle transport operations, optical tweezers, radiation pressure, silica beads, stochastic dynamic programming framework, stochastic programming},
	isbn = {1545-5955},
	doi = {10.1109/TASE.2009.2026056},
	author = {Banerjee,A. G. and Pomerance,A. and Losert,W. and Gupta,S.K.}
}
@conference {18829,
	title = {Enhanced force measurement techniques to extend optical trapping towards nanoscale manipulation},
	year = {2009},
	month = {2009/07//},
	pages = {13 - 16},
	abstract = {We have developed a new force measurement technique based on the random thermal motion of a nanoparticle in an optical trap. We demonstrate this method, in one-dimension, through numerical simulations and laboratory experiments. We show that computer simulations successfully recover the profile of the optical trapping force, beyond the inflection point of the trapping potential for a range of particle sizes. We show, through laboratory experiments, that this technique is effective in recovering higher order terms, in a power series expansion of the trapping force, beyond the widely reported linear trap stiffness. We also show that the first order (stiffness) term in our series expansion is consistent with values reported in the literature.},
	keywords = {Brownian motion, extend optical trapping, Fokker-Planck equation, force measurement, inflection point, linear trap stiffness, nanoparticle, nanoparticles, nanoscale manipulation, nanotechnology, optical trapping force, power series expansion, radiation pressure, random thermal motion},
	author = {Balijepalli,A. and LeBrun,T. W. and Gorman,J. J. and Gupta,S.K.}
}
