UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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Conference: Bucharest University Faculty of Physics 2016 Meeting


Section: Optics, Spectroscopy, Plasma and Lasers


Title:
Time deconvolution of lasing emission of microvolumetric droplets pumped by laser beams


Authors:
M. BONI(1,2), I. R. ANDREI(1), Angela STAICU(1), M-L. PASCU(1,2)


Affiliation:
1)The National Institute for Laser, Plasma and Radiation Physics, Magurele, Romania

2)University of Bucharest, Faculty of Physics, Magurele, Romania


E-mail
mihai.boni@inflpr.ro


Keywords:
droplets, lasing,


Abstract:
Microvolumetric pendant droplets containing laser dye, Rhodamine 6G (Rh6G), pumped with second harmonic beam emitted by a pulsed Nd: YAG laser system at λ = 532 nm are reported in this communication[1,2]. The temporal structure of a single droplet emission is measured, that yields information about a measured deconvolution of the laser induced fluorescence (LIF) and of the amplification of the signal that is emitted by a single droplet. The volume of the droplets used for this experiments is 1 μl and their diameter is 1.24 mm. The energy used in measurements was chosen to keep the unresonant effects small enough to be able to properly measure LIF. The maximum laser beam energy applied to perform LIF measurements on droplets was 20 mJ, at 10-3 M dye concentration. This type of measurements can lead to generation of tunable microlasers that may be used in medical/technological applications.


References:

1. M. Boni, V. Nastasa, Angela Staicu, I.R. Andrei, M.L. Pascu, Characterisation of fluorescent pendant droplets, Romanian Reports in Physics, Vol. 67, No. 4, P. 1278–1287, (2015)

2. M. Boni, V. Nastasa, I. R. Andrei, Angela Staicu, and M. L. Pascu, Enhanced fluorescence emitted by microdroplets containing organic dye emulsions, Biomicrofluidics 9, 014126 (2015)



Acknowledgement:
Acknowledgements: The authors from NILPRP acknowledge the financing of the research by MEN-CDI Nucleu project: PN1647/2016 and CNCS – UEFISCDI by project number PN-II-ID-PCE-2011-3-0922, and University of Bucharest, Faculty of Physics.