María del Mar Sánchez interviewed at the SPIE 2017-Gender Equity in the Optics and Photonics Workplace

Gender ESSThe SPIE Gender Equity Task Force was formed to identify how the professional environment of the optics and photonics community can better enable equal opportunities, rewards, and recognition for its members, independent of gender.

This year, Maria del Mar was one of the 16 professionals interviewed for the 2017 edition. The survey is the largest of its kind in the optics and photonics community, receiving nearly 10,000 valid responses and representing 105 countries and a wide range of disciplines. The results of this study can be download at the following link.

SPIE GE

Categories: Outreach, Women in Optics Tags:
Jueves, 21 de septiembre de 2017 Sin comentarios

New paper in Optics Express about dual polarization split lenses

OptExpressWe published a new paper in Optics Express where we report the realization of polarization sensitive split lens configurations. We propose and demonstrate the generalization of the split lens concept to vectorial split lenses, leading to light patterns with customized intensity and state of polarization. We demonstrate how these polarization split lenses can be experimentally implemented by means of an optical system using two liquid crystal spatial light modulators, each one phase modulating one orthogonal polarization component.

The proposed technique is a simple method to generate structured light beams with polarization diversity, with potential applications in polarimetry, customized illuminators or quantum optics.

This work has been published in Optics Express, entitled Dual polarization split lenses. The work has been developed in collaboration with our friends at the Departamento de Ciencias Físicas, Universidad de la Frontera (Chile) and our friends at Departamento de Física de la Universitat Autònoma de Barcelona. And it i stye third paper resulting from the Thesis of the PhD student Aarón Cofré.

Martes, 19 de septiembre de 2017 Sin comentarios

María del Mar Sánchez gives a talk on q-plates at the Meeting of the Royal Spanish Physical Society

RSEFMaría del Mar Sanchez gave a talk about the generation of vectors beams with q-plate devices at the Meeting of the Royal Spanish Physical Society held in Santiago de Compostela in July 2017, 17th-21st, within the Symposium of Quantum & Non-linear Optics.

In this presentation, Maria del Mar reviewed some of our recent works. In the first part of the talk she presented the  performance of q-plates, and their combination to build other effective q-plates. In the second part she described the  implementation of q-plates on spatial light modulators, as well as their combination with axicon elements to create vector Bessel beams where both the topological charge and the polarization state vary upon propagation.

Categories: Collaborators, Conferences, Research Tags:
Jueves, 31 de agosto de 2017 Sin comentarios

Marcos Maestre presents his Final Degree Project on a system to control light pulses and measure slow and fast light

IMG_7139On Friday July 7th, Marcos Maestre, student of Telecommunications Engineering, has defended his Final Degree Project entitled “Control de Pulsos Ópticos en Fibra y Medida de Efectos de Luz Lenta y Luz Rápida en Interferómetros“.

In this work, an instrumental system and its control software has been developed in order to characterize electro-optical modulators and polarization interferometers based on birefringent fibers. Using this setup slow and fast light (SFL) effects have been demonstrated for optical pulses centered at 1550 nm.

The project, which has been supervised by Julia Arias and María del Mar Sánchez-López, has obtained the maximum qualification, with honours.

A related communication will be presented at OPTOEL2017 – the Spanish Meeting on Optoelectronics.

Categories: Education, Research, Students Tags:
Domingo, 23 de julio de 2017 Sin comentarios

Pascuala García presents an SLM based optical microscope at the SPIE Optical Metrology Conference in Munich

SPIE PasPascuala Garcia presented the communication entitled “On axis programmable microscope using liquid crystal spatial light modulator” at the SPIE Optical Metrology Conference, held in Munich in June 25th to 29th, 2007.

In her presentation, she showed an optical microscope system we have developed, that includes an LCOS SLM display to perform opto-digital filtering on-axis. We use a Hamamatsu SLM, free of flickering, which can be tuned to fully eliminate the zero order component of the encoded diffractive filter, therefore making use of the full space-bandwidth. The system was demonstrated by implementing different optical processing operations based on phase-only gratings such as phase-contrast, band-pass filtering, additive and subtractive imaging, or Differential Interference Contrast (DIC) imaging.

A related manuscript is available at the SPIE Proceedings in Optical Methods for Inspection, Characterization, and Imaging of Biomaterials III, edited by Pietro Ferraro, Simonetta Grilli, Monika Ritsch-Marte, Christoph K. Hitzenberger, Proc. of SPIE Vol. 10333, 103330Q (2017). Link

 

Viernes, 21 de julio de 2017 Sin comentarios

María del Mar Sánchez presents Outreach & Education activities in Photonics at the 1st UMH Workshop on Collaborative Innovation

María del Mar Sánchez presented the last activities in outreach & education in photonics developed by our group at the 1ª Jornada de Innovación Colaborativa de la UMH (1st UMH Workshop on Collaborative Innovation) held in Elche on the 20th of June, 2017. This workshop gathered educators of Elementary Schools, Hight Schools, and Universities.

The presentation, entitled “La divulgación como instrumento de innovación educativa: el caso de la Fotónica” (in Spanish), can be viewed at the following link:

Categories: Education, Outreach Tags:
Jueves, 20 de julio de 2017 Sin comentarios

New paper in OLT with a new polarization grating based single shot polarimeter

OLTWe developed a quantitative analysis of the performance of a complete snapshot polarimeter based on a polarization diffraction grating (PDGr). The work has been published in the paper entitled Quantitative performance of a polarization diffraction grating polarimeter encoded onto two liquid-crystal-on-silicon displays, published at the journal Optics & Laser technology.

The PDGr is generated in a common path polarization interferometer with a Z optical architecture that uses two liquid-crystal on silicon (LCoS) displays. The programmable PDGr is capable to act as a simultaneous polarization state generator (PSG), yielding diffraction orders with different states of polarization. The same system is also shown to operate as a polarization state analyzer (PSA), therefore useful for the realization of a snapshot polarimeter. We analyze its performance using quantitative metrics such as the conditional number.

This work has been developed in collaboration with our friends at the Departamento de Ciencias Físicas, Universidad de la Frontera (Chile) and our friends at Departamento de Física de la Universitat Autònoma de Barcelona. And it will part of the PhD Thesis of Aarón Cofré.

Miércoles, 14 de junio de 2017 Sin comentarios

New paper in Scientific Reports, with a polarization grating design for the section of vector beams

SciRep

We published a new paper in Scientific Reports entitled Vector Beam Polarization State Spectrum Analyzer. This work has been done with our friends at San Diego State University.

In this work we present a proof of concept for a vector beam polarization state spectrum analyzer based on the combination of a polarization diffraction grating (PDG) and an encoded harmonic q-plate grating (QPG). The result is a two-dimensional polarization diffraction grating that generates six different q-plate channels with topological charges from −3 to +3 in the horizontal direction, and each is split in the vertical direction into the six polarization channels at the cardinal points of the corresponding higher-order Poincaré sphere. Consequently, 36 different channels are generated in parallel.

We show that this system can be used as a vector beam polarization state spectrum analyzer, where both the topological charge and the state of polarization of an input vector beam can be simultaneously determined in a single experiment.

Download the paper here

 

Categories: Collaborators, Publications, Research Tags:
Viernes, 26 de mayo de 2017 Sin comentarios

New paper in Journal of Biomedical Optics about a polarization gating method

JBOA new paper has been published in Journal of Biomedical Optics entitled Polarization gating based on Mueller matrices.

This work has been developed at the Department of Physics of the Autonomous University of Barcelona, with the participation of Ignacio Moreno.

It demonstrates a polarization gating method based on the experimentally measured Mueller matrices. Polarization gating refers to a collection of imaging methods based on the combination of different controlled polarization channels. Here, first the Mueller matrix is characterized, and then employed to evaluate different polarization channels. The methodology is applied on different biological samples.

 

Martes, 16 de mayo de 2017 Sin comentarios

Prof. Kristiaan Neyts visits TecnOpto-UMH

We were very pleased that Prof. Kristiaan Neyts, Head of the Liquid Crystals and Photonics Group from the Ghent University, accepted our invitation to come to Elche and impart a seminar on liquid crystals in the frame of the 3rd TECNIT PhD Workshop of our university, held in March 29th.

You can access to his seminar  LIQUID CRYSTALS: ROTATING MOLECULES FOR TUNABLE OPTICS here:

Martes, 11 de abril de 2017 Sin comentarios