Rotating full Poincare beams

Abstract

Abstract. We demonstrate numerically the existence and dynamical properties of rotating full Poincaré beams. They are generated either spontaneously or by injection of an optical field into the isotropic laser containing no selective elements except for a circular diaphragm that controls the Fresnel number of laser cavity. For moderate Fresnel numbers, five different kinds of full Poincaré laser modes are available. Each of these modes has an axially symmetric total intensity profile and a distinct polarization pattern that rotates around the beam axis with a constant velocity.

Shaping the topology of light with a moving Rabi-oscillating vortex

“…More recently, such a double-beam superposition state has been enriched with temporal dynamics thanks to the Rabi oscillations 47,48 arising in strongly-coupled systems, such as polaritons that are themselves a superposition of microcavity photons and quantum well excitons. This led to the realization of the so-called full-Bloch beam 49 (FBB) with a whole pseudospin (Bloch vector) texture in the transverse plane which is also rotating and drifting in time, similarly to what has been theorized for rotating full-Poincaré beams 50 and their polarization texture. As a consequence, using the natural filtering of the full-wavefunction offered by the cavity photoluminescence, rather than using a polarization filtering, the Bloch singularity was directly projected into the helicoidal dynamics of a vortex line sculpted into the light emission from the system.…”

Generation of rotating multi-vortex laser beams

“…The transverse mode interaction via nonlinear gain medium can lead to either stationary structures with transverse mode locking to a common optical frequency [8] or dynamic structures with frequency mode beating [9], depending on the cavity configuration. In particular, rotating intracavity laser structures with the phase [10,11] and polarization [12,13] topological defects can exist in this case. These rotating beams are of interest for applications such as multiple particle manipulation [14] and communication [15].…”