Research lines

The following research topics are addressed:

Laboratorio OpticaSpatial Light Modulators & Liquid Crystal Devices,

We develop reverse engineering techniques to derive physical models able to predict the modulation of liquid crystal modulators and spatial light modulators (SLM). We work with different technologies like twisted nematic modulators, parallel aligned nematic modulators, and ferroelectric modulators.


 

CGHActive and Programmable Optics,

We apply SLMs to develop active optical elements based on their programmability and control from a computer. We develop computer controlled optical elements and systems.

As an example, see here a video demonstrating the real-time control of a laser beam: link


 

CGH2Diffractive Optics & Computer Generated Holograms,

We develop tools for the design, fabrication and evaluation of computer generated holograms (CGH), and digital diffractive optical elements (DOE).

We use iterative algorithms for the design of these elements. We generate detour-phase holograms, kinoform holograms, and geometrical-phase holograms.


 

INTERFERENCIASPolarimetry, Interferometry and Optical Sensing,

We apply SLMs and CGH for different techniques in polarimetry and interferometry, in order to develop optical sensing methods. We study methods to generate and detect cylindrically polarized light beams.

We are developing tools to generate vector beams, a special type of polarized light where the state of polarization varies spatially.


 

Slow & Fast Light - SmallSlow and Fast Light

We investigate novel schemes to propagate electromagnetic pulses with extremely small (slow light) or superluminal and even negative (fast light) group velocity. We develop theoretical models that are probed by performing experiments in the RF and MW range and through numerical simulations in the optical range. Slow and fast light effects have been thus demonstrated in multiple-beam interferometers and multilayer photonic structures which could be used in sensing applications. We also investigate group velocity control by means of liquid-crystal based devices.

 

Lunes, 28 de mayo de 2018