We present an overview of the main issues concerning the orbital angular momentum of
light, starting form the framework of its definition, passing through the developments of the …

On–off intermittency occurs in nonequilibrium physical systems close to bifurcation points,
and is characterised by an aperiodic switching between a large-amplitude'on'state and a …

We present an alternative form of intermittency, Lévy on-off intermittency, which arises from
multiplicative α-stable white noise close to an instability threshold. We study this problem in …

The high sensitivity of liquid crystals to external fields, especially electromagnetic fields,
confer to them fascinating properties. In the case of light fields, their large optical …

Intense laser light traversing a thin layer of nematic liquid crystal is an example of a simple,
easy to realise physical system, that shows very complex behaviour. Light can turn the …

Intermittent switches between low-frequency fluctuations and steady-state emission are
experimentally observed in two bidirectionally coupled semiconductor lasers subject to …

The availability of laser beams carrying orbital angular momentum in addition to spin
angular momentum paved the way to the observation of novel effects in quantum and …

We report an experimental study of the intermittent dynamics of a gas flowing through a
column of a non-Newtonian fluid. In a given range of the imposed constant flow rate, the …

We introduce the concept of singular optical reordering of birefringent elastic media using
Gaussian beams. Theoretical and experimental results are reported in the particular case of …

The effect of optical orientation in nematic liquid crystals containing small additions of high-
molecular compounds, ie, comb-shaped polymers with light-absorbing azobenzene side …