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OPTICA COMPUTACIONAL Y CONTROL DIGITAL DE HACES DE LUZ. APLICACIONES EN IMAGEN A TRAVES DE MEDIOS TURBIOS Y EN SINTESIS LASER DE NANOMATERIALES

OPTICA COMPUTACIONAL Y CONTROL DIGITAL DE HACES DE LUZ. APLICACIONES EN IMAGEN A TRAVES DE MEDIOS TURBIOS Y EN SINTESIS LASER DE NANOMATERIALES
Área de investigación: Óptica
Estado: En progreso
Líderes del proyecto:
Colaboradores:
Inicio propuesto: 01/01/2017
Límite propuesto: 31/12/2018
Descripción:

The leverage of photonics and light-based technologies on solving key societal challenges of this century has seen substantial growth in several areas such as energy generation and energy efficiency, healthy ageing of the population, climate change, and security. The increasing demand on performance for photonics-based devices has generated a great scientific and technological activity aimed to widen even more its range of applications. Smart control over light propagation is one elephant in room question that undoubtedly needs to be addressed to push the current boundaries of photonic technologies. Digital spatial light modulators are devices that provide fine-grained control of light, allowing the writting of light patterns with user-controllable characteristics. Despite the large prevalence of spatial light modulators in current photonic devices, there is a need for novel paradigms in computational optics to take full advantage of modern data allocation and field programmable gate arrays in technology-driven displays, such as the digital micromirror device that is able to operate at frame rates above 50 kHz even beyond the visible. Advanced physical models and creative numerical algorithms, based on compressive sensing or deep learning, that maximize the efficiency with which those models can be solved, will contribute to decrease the operational burden over photonic tools extending significantly the range of applications.

 


The proposal develops a new family of photonic devices that work by simultaneously designing both the optical system and the imageprocessing algorithms, thus enabling digital light control through programmable megapixel spatial light modulators. Together, the optics and the algorithms can achieve things that neither could do alone. A hot topic that will be considered within the project is compressive sensing that will enable to recover the image of an object that is deep inside a scattering media at video rate in a single-pixel camera. This goal is especially relevant in medicine. Unlike X rays, visible and infrared light is nonionizing and hence it is safe for use in vivo organisms at power levels below the threshold damage of tissue. At the same time, optical imaging offers better resolution than other non-invasive techniques such as microwave and ultrasound imaging. Specifically, the proposal will deploy new instrumentation to break frontiers in highresolution imaging through scattering media, reaching regions inside the sample deeper than the centimeter as well as monitoring fast events requiring sampling rates above the kilohertz. In a complementary scenario, adaptive correction of spatial and temporal distortions of femtosecond pulses at the focus enables high-precision processing of materials by minimizing nonlinear side effects. The project will also provide new devices for the emerging field of laser-targeted, environmentally friendly photofabrication of nanofluids, where computational optics will allow gaining control over the laser ablation mechanism at the nanoscale and, as a result, over the size, concentration and distribution of the colloidal nanoparticles. We target the fabrication of nanofluids that can be used as volumetric radiation absorbers and as heat transfer media in solar energy applications. We also envisage the fabrication of high-quality gold nanoparticles for labeling and sensing divers parameters of interest in biomedicine.

 

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