High localization, focal depth and contrast by means of nonlinear Bessel beams

Polesana, P., Faccio, D. , Di Trapani, P., Dubietis, A., Piskarskas, A., Couairon, A. and Porras, M. A. (2005) High localization, focal depth and contrast by means of nonlinear Bessel beams. Optics Express, 13(16), pp. 6160-6167. (doi: 10.1364/OPEX.13.006160) (PMID:19498627)

Abstract

We show an experimental and computational comparison between the resolution power, the contrast and the focal depth of a nonlin-early propagated diffraction-free beam and of other beams (a linear and a nonlinearly propagated Gaussian pulse): launching a nondiffractive Bessel pulse in a solution of Coumarine 120 in methanol creates a high contrast, 40 mm long, 10 μm width fluorescence channel excited by 3-photon absorption process. This fluorescence channel exhibits the same contrast and resolution of a tightly focused Gaussian pulse, but reaches a focal depth that outclasses by orders of magnitude that reached by an equivalent Gaussian pulse.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Faccio, Professor Daniele
• Authors: Polesana, P., Faccio, D., Di Trapani, P., Dubietis, A., Piskarskas, A., Couairon, A., and Porras, M. A.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Optics Express
• Publisher: Optical Society of America
• ISSN: 1094-4087
• ISSN (Online): 1094-4087