Piccirillo, Bruno and Vella, Angela and Setaro, Antonio and Santamato, Enrico (2006) Nonlinear dynamics induced in liquid crystals in the presence of the orbital and spin angular momentum of light. [Pubblicazione in rivista scientifica]

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Item Type: Pubblicazione in rivista scientifica
Uncontrolled Keywords: Ottica nonlineare, cristalli liquidi, dinamica nonlineare
Date Deposited: 20 Oct 2010 08:00
Last Modified: 30 Apr 2014 19:41
URI: http://www.fedoa.unina.it/id/eprint/6218

Abstract

We studied the dynamical effects induced in a homeotropic nematic film when a normally incident circularly polarized light beam with an elliptical intensity profile is used. A three dimensional dynamical model shows that, besides the spin, the orbital angular momentum of photons also plays a role in the reorientation process. Our measurements fairly reproduce the main dynamical features predicted by the model in the near threshold region. The model, however, does not work, as it is, at higher incident laser power where chaotic director rotation was reported [A. Vella, A. Setaro, B. Piccirillo, E. Santamato, Phys. Rev. E 67, 051704 (2003)].

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