Nanosecond spectroscopic measurement and laser ablation of an optically trapped latex particle

H. Misawa*, M. Koshioka, K. Sasaki, N. Kitamura, Hiroshi Masuhara

*Corresponding author for this work

Research output: Contribution to conferencePaper

Abstract

The observation of time-resolved emission spectroscopy and laser ablation of a single trapped polymethyl methacrylate (PMMA) latex (≈5-μm diameter) in water is reported. A laser-trapping-spectroscopy-ablation system developed in the study is shown, and the experimental procedure is described. The nanosecond time-resolved (100-ns gate) emission spectrum of a pyrene-doped PMMA latex (approximately 5 μm) was measured under illumination of both CW and pulsed YAG lasers. Since the coverage of pyrene on the latex is low, the only detectable emission was structured pyrene monomer fluorescence with its maximum around 400 nm. In analogous conditions, an increase in pulsed YAG laser power resulted in ablation of a pyrene-doped latex. When a CW YAG laser was turned off, a latex particle irradiated by a pulsed laser was repelled. Laser trapping is the necessary condition for time-resolved emission spectroscopy and laser ablation of a single particle.

Original languageEnglish
Pages170-171
Number of pages2
StatePublished - 1 Dec 1990
Event17th International Conference on Quantum Electronics - IQEC '90 - Anaheim, CA, USA
Duration: 21 May 199025 May 1990

Conference

Conference17th International Conference on Quantum Electronics - IQEC '90
CityAnaheim, CA, USA
Period21/05/9025/05/90

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    Misawa, H., Koshioka, M., Sasaki, K., Kitamura, N., & Masuhara, H. (1990). Nanosecond spectroscopic measurement and laser ablation of an optically trapped latex particle. 170-171. Paper presented at 17th International Conference on Quantum Electronics - IQEC '90, Anaheim, CA, USA, .