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A research group dedicated to study the fundamental physical properties of light beams.

Optical Forces in Optical Beams with Space-Variant Polarization

Optical trapping and manipulation rely on understanding the dynamical properties of light, such as energy, momentum and angular momentum. In particular, the spin momentum density has recently attracted attention for its potential applications  in the manipulation of nanoparticles and the excitation of single atoms.

We characterize the spin and orbital momentum densities in the superposition of two paraxial vortex beams with orthogonal polarizations. Our goal is to understand the interplay between the two types of momentum densities. In addition, it provides a practical model that can be implemented experimentally to demonstrate the spin part of the optical energy flows.

 

 

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Geometric Phase Polarimetry

If light travels a set of optical elements, it acquires a dynamic and a geometric phase. The former is produced by the optical path length and the latter by the evolution of the polarization state on the Poincaré sphere. The goal of this project is to manipulate space-variant polarized beams by shaping the polarization distribution according to the response of the optical system.

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Quantum Optical Coherence Tomography

Quantum-optical coherence tomography is a novel imaging technique capable of measuring the internal structure of a sample by employing nonclassical states of light, such as entangled photon pairs. Our goal is to improve this technique to the level of real medical applications.

 

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Terahertz optical elements fabricated by 3D-printing technology

In this project, we work in the design, fabrication and characterization of q-plates for the generation of structured terahertz beams.

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