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Dive into the research topics where Ó. Martínez-Matos is active.

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Featured researches published by Ó. Martínez-Matos.


Optics Express | 2011

Characterization of holographically generated beams via phase retrieval based on Wigner distribution projections

José A. Rodrigo; Tatiana Alieva; Alejandro Cámara; Ó. Martínez-Matos; Pavel Cheben; M. L. Calvo

In this work, we propose a robust and versatile approach for the characterization of the complex field amplitude of holographically generated coherent-scalar paraxial beams. For this purpose we apply an iterative algorithm that allows recovering the phase of the generated beam from the measurement of its Wigner distribution projections. Its performance is analyzed for beams of different symmetry: Laguerre-Gaussian, Hermite-Gaussian and spiral ones, which are obtained experimentally by a computer generated hologram (CGH) implemented on a programmable spatial light modulator (SLM). Using the same method we also study the quality of their holographic recording on a highly efficient photopolymerizable glass. The proposed approach is useful for the creation of adaptive CGH that takes into account the peculiarities of the SLM, as well as for the quality control of the holographic data storage.


Applied Physics Letters | 2007

Diffusion study in tailored gratings recorded in photopolymer glass with high refractive index species

Ó. Martínez-Matos; M. L. Calvo; José A. Rodrigo; Pavel Cheben; Francisco del Monte

We report results on the temporal evolution of the diffraction efficiency of volume holographic gratings recorded in a photopolymer glass incorporating Zr-based high refractive index species (HRIS) at molecular level. We record high spatial frequency gratings in this material with diffraction efficiencies near 100%. A two-component diffusion model is introduced for the evolution of refractive index modulation in darkness. Diffusion parameters for the Zr-based HRIS and monomer components have been determined. Codirectional diffusion of both components is demonstrated. The results show the feasibility for tailoring in this photomaterial holographic gratings with high diffraction efficiency over a wide range of spatial frequencies.


Optics Express | 2012

Negative propagation effect in nonparaxial Airy beams

Pablo Vaveliuk; Ó. Martínez-Matos

Negative propagation is an unusual effect concerning the local sign change in the Poynting vector components of an optical beam under free propagation. We report this effect for finite-energy Airy beams in a subwavelength nonparaxial regime. This effect is due to a coupling process between propagating and evanescent plane waves forming the beam in the spectral domain and it is demonstrated for a single TE or TM mode. This is contrary to what happens for vector Bessel beams and vector X-waves, for which a complex superposition of TE and TM modes is mandatory. We also show that evanescent waves cannot contribute to the energy flux density by themselves such that a pure evanescent Airy beam is not physically realizable. The break of the shape-preserving and diffraction-free properties of Airy beams in a nonparaxial regime is exclusively caused by the propagating waves. The negative propagation effect in subwavelength nonparaxial Airy beams opens new capabilities in optical traps and tweezers, optical detection of invisibility cloacks and selective on-chip manipulation of nanoparticles.


Optics Letters | 2010

Generation of femtosecond paraxial beams with arbitrary spatial distribution

Ó. Martínez-Matos; José A. Rodrigo; M. P. Hernández-Garay; J. G. Izquierdo; Rosa Weigand; M. L. Calvo; Pavel Cheben; P. Vaveliuk; L. Bañares

We present an approach to generate paraxial laser beams with arbitrary spatial distribution in the femtosecond time regime. The proposed technique is based upon a pair of volume phase holographic gratings working in parallel arrangement. It exploits the spatial coherence properties of the incoming laser beam in a compact and robust setup that mitigates angular and spatial chirp. The gratings were recorded in a photopolymerizable glass with a high optical damage threshold and a large optical throughput. Setup performance is studied and experimentally demonstrated by generating Laguerre-Gaussian femtosecond pulses.


Optics Express | 2011

Femtosecond spectral pulse shaping with holographic gratings recorded in photopolymerizable glasses.

M. P. Hernández-Garay; Ó. Martínez-Matos; J. G. Izquierdo; M. L. Calvo; P. Vaveliuk; Pavel Cheben; L. Bañares

The majority of the applications of ultrashort laser pulses require a control of its spectral bandwidth. In this paper we show the capability of volume phase holographic gratings recorded in photopolymerizable glasses for spectral pulse reshaping of ultrashort laser pulses originated in an Amplified Ti: Sapphire laser system and its second harmonic. Gratings with high laser induce damage threshold (LIDT) allowing wide spectral bandwidth operability satisfy these demands. We have performed LIDT testing in the photopolymerizable glass showing that the sample remains unaltered after more than 10 million pulses with 0,75 TW/cm2 at 1 KHz repetition rate. Furthermore, it has been developed a theoretical model, as an extension of the Kogelniks theory, providing key gratings design for bandwidth operability. The main features of the diffracted beams are in agreement with the model, showing that non-linear effects are negligible in this material up to the fluence threshold for laser induced damage. The high versatility of the grating design along with the excellent LIDT indicates that this material is a promising candidate for ultrashort laser pulses manipulations.


Optics Letters | 2009

Polarization and phase-shift properties of high spatial frequency holographic gratings in a photopolymerizable glass

Ó. Martínez-Matos; José A. Rodrigo; M. L. Calvo; Pavel Cheben

Polarization properties of transmission volume holographic phase gratings recorded in a photopolymerizable glass modified with high refractive index species are reported. The gratings are recorded by the interference of two parallel s-polarized writing beams with orthogonal propagation directions. High optical quality, low scattering, and diffraction efficiency of 99.4% are achieved. Degrees of polarization of 0.987 and 0.999 are obtained for transmitted and diffracted light, respectively. Furthermore, phase analysis of the transmitted light reveals a phase discontinuity of pi at the Bragg angle.


Applied Physics Letters | 2014

Femtosecond laser induced damage characterization of transmission volume phase gratings

Ó. Martínez-Matos; M. P. Hernández-Garay; J. G. Izquierdo; P. Vaveliuk; L. Bañares; M. L. Calvo

A procedure to characterize the induced damage and the incubation effects in volume transmission gratings under femtosecond laser pulse train illumination is presented. It was also developed a formalism that explains the damage processes. Our proposal was employed on glass gratings to show the effectiveness of the method and its potential to design transmission gratings with enhanced laser induced damage threshold. This procedure is able to be extended to any transmission grating composed by chemically non-uniform material, opening up new perspectives to femtosecond laser pulse shaping.


Optics Express | 2011

Effect of ABCD transformations on beam paraxiality

Pablo Vaveliuk; Ó. Martínez-Matos

The limits of the paraxial approximation for a laser beam under ABCD transformations is established through the relationship between a parameter concerning the beam paraxiality, the paraxial estimator, and the beam second-order moments. The applicability of such an estimator is extended to an optical system composed by optical elements as mirrors and lenses and sections of free space, what completes the analysis early performed for free-space propagation solely. As an example, the paraxiality of a system composed by free space and a spherical thin lens under the propagation of Hermite-Gauss and Laguerre-Gauss modes is established. The results show that the the paraxial approximation fails for a certain feasible range of values of main parameters. In this sense, the paraxial estimator is an useful tool to monitor the limits of the paraxial optics theory under ABCD transformations.


Optical Memory and Neural Networks | 2009

Photopolymerizable glass with high refractive index species: Optical performance and emerging implementations

Ó. Martínez-Matos; José A. Rodrigo; M. L. Calvo; V. Hevia-Martín; Pavel Cheben

The properties of a photopolymerizable glass modified with high refractive index species incorporated at molecular level, including a wide range of spatial frequencies and the recording kinetics, are analyzed. Implementation of emerging applications is proposed.


Optics Letters | 2017

Caustic beams from unusual powers of the spectral phase

Pablo Vaveliuk; A. Lencina; Ó. Martínez-Matos

Caustic optical beams arising from a spectral phase whose power lies in an unusual range of values less than two are presented. Unlike what happens for conventional phase powers greater than two, it is feasible to generate caustic structures having properties that do not follow the established sorting. For instance, an asymptotic cusp caustic beam having a cusp point at infinity is demonstrated. For the sake of completeness, the caustic beam properties are analyzed within the whole real range of the phase power. Accurate behavior rules between the symmetries of the beam spectral phase and its intensity distribution are found. These findings strengthen the fundamentals and engineering on caustic beams in diverse optical and physical branches.

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M. L. Calvo

Complutense University of Madrid

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José A. Rodrigo

Complutense University of Madrid

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Pavel Cheben

National Research Council

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J. G. Izquierdo

Complutense University of Madrid

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M. P. Hernández-Garay

Complutense University of Madrid

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F. del Monte

Spanish National Research Council

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L. Bañares

Complutense University of Madrid

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P. Vaveliuk

Complutense University of Madrid

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Pablo Vaveliuk

National Scientific and Technical Research Council

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P. Vaveliuk

Complutense University of Madrid

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