Effect of pulse temporal shape on optical trapping and impulse transfer using ultrashort pulsed lasers

Janelle C. Shane, Michael Mazilu, Woei Ming Lee, Kishan Dholakia

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

We investigate the effects of pulse duration on optical trapping with high repetition rate ultrashort pulsed lasers, through Lorentz-Mie theory, numerical simulation, and experiment. Optical trapping experiments use a 12 femtosecond duration infrared pulsed laser, with the trapping microscope's temporal dispersive effects measured and corrected using the Multiphoton Intrapulse Interference Phase Scan method. We apply pulse shaping to reproducibly stretch pulse duration by 1.5 orders of magnitude and find no material-independent effects of pulse temporal profile on optical trapping of 780nm silica particles, in agreement with our theory and simulation. Using pulse shaping, we control two-photon fluorescence in trapped fluorescent particles, opening the door to other coherent control applications with trapped particles.

Original languageEnglish
Pages (from-to)7554-7568
Number of pages15
JournalOptics Express
Volume18
Issue number7
DOIs
Publication statusPublished - 2010 Mar 29

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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