Bessel beams 8, 9, however, do not diverge and, furthermore, if part of the beam is obstructed or distorted the beam reconstructs itself after a characteristic propagation distance 10. Here we show how this reconstructive property may be utilized within optical tweezers to trap particles in multiple, spatially separated sample cells with a single beam. Owing to the diffractionless nature of the Bessel beam, secondary trapped particles can reside in a second sample cell far removed ( ∼3 mm) from the first cell. Such tweezers could be used for the simultaneous study of identically prepared ensembles of colloids and biological matter, and potentially offer enhanced control of ‘lab-on-a-chip’ and optically driven microstructures.Īshkin, A., Dziedzic, J. Observation of a single-beam gradient force optical trap for dielectric particles. Overstretching B-DNA: The elastic response of individual double strained and single stranded DNA molecules. Methods of digital video microscopy for collodial studies. Entropic attraction and repulsion in binary colloids probed with a line optical tweezer. Like charge attractions in metastable colloidal crystallites. J., Rubinsztein-Dunlop, H., Gold, J., Hagberg, P. Volke-Sepulveda, K., Garcés-Chávez, V., Chávez-Cerda, S., Arlt, J. Orbital angular momentum of a high-order Bessel light beam.
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