Manuel Ortuño
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View article: Polarimetric-Based Analysis and Manufacturing of Dye-Doped Liquid Crystal Photoaligned Cells for the Visible Range
Polarimetric-Based Analysis and Manufacturing of Dye-Doped Liquid Crystal Photoaligned Cells for the Visible Range Open
The accurate and controlled alignment of liquid crystals (LCs) in modern optical devices is of great importance. Photoalignment is one of the most appealing approaches for achieving more versatile alignment in designs. One of the most impo…
View article: High-performance liquid chromatography and UV-visible measurements to optimize the storage of volume holograms in hydrogels
High-performance liquid chromatography and UV-visible measurements to optimize the storage of volume holograms in hydrogels Open
The storage of time-stable holographic gratings in photohydrogels when the material is immersed in liquid media represents a great challenge at present. A very important stage in the process of storing holograms in photohydrogels are the w…
View article: Liquid crystal doped photopolymer micro-droplets printed by a simple and clean laser-induced forward transfer process
Liquid crystal doped photopolymer micro-droplets printed by a simple and clean laser-induced forward transfer process Open
We print a tunable photopolymer (photopolymer dispersed liquid crystal -PDLC), using the laser-induced direct transfer technique without absorber layer, which was a challenge for this technique given the low absorption and high viscosity o…
View article: Photopolymer characterization by high frequency pulsed laser
Photopolymer characterization by high frequency pulsed laser Open
Maximizing phase modulation in photopolymers remains a challenge in order to use these materials to fabricate photonics devices. Different material compositions and irradiation conditions have been studied in order to achieve it. One of th…
View article: Adulterant Detection in Peppermint Oil by Means of Holographic Photopolymers Based on Composite Materials with Liquid Crystal
Adulterant Detection in Peppermint Oil by Means of Holographic Photopolymers Based on Composite Materials with Liquid Crystal Open
Diffraction gratings are recorded in a holographic photopolymer containing nematic liquid crystal and peppermint oil. The presence of the oil modifies the polymerization and the holographic response. The composite containing oil adulterate…
View article: Tunable Waveguides Couplers Based on HPDLC for See-Through Applications
Tunable Waveguides Couplers Based on HPDLC for See-Through Applications Open
Photopolymers have become an important recording material for many applications, mainly related to holography. Their flexibility to change the chemical composition together with the optical properties made them a versatile holographic reco…
View article: Waveguide couplers based on HPDLC for see-through applications: initiator optimization
Waveguide couplers based on HPDLC for see-through applications: initiator optimization Open
Polymer nanocomposites are designed and engineered on a nanometer scale with versatile applications including optics and photonics. During the last two decades, different photopolymerizable nano-compounds were introduced and developed to m…
View article: Characterization of registered holographic lenses in a photopolymer compatible with the environment
Characterization of registered holographic lenses in a photopolymer compatible with the environment Open
En este trabajo se presenta un dispositivo para obtener lentes holográficas (LH) en un fotopolímero compatible medioambientalmente sensibilizado a la longitud de onda de 488 nm. Utilizando este dispositivo se han obtenido LH's, reconstruid…
View article: Reflection holograms stored in an environment-friendly photopolymer
Reflection holograms stored in an environment-friendly photopolymer Open
In recent years, the development of low-toxicity photopolymers for holographic recording in reflection mode has reached great importance. One of the main advantages of reflection holograms is that they can be reconstructed using white ligh…
View article: LED-Cured Reflection Gratings Stored in an Acrylate-Based Photopolymer
LED-Cured Reflection Gratings Stored in an Acrylate-Based Photopolymer Open
The storage of volume holographic reflection gratings in low-toxicity photopolymers represents a challenge at present since they can be used in many important applications such as biosensors and holographic optical elements. In this contex…
View article: Holographic Characteristics of Photopolymers Containing Different Mixtures of Nematic Liquid Crystals
Holographic Characteristics of Photopolymers Containing Different Mixtures of Nematic Liquid Crystals Open
A holographic polymer dispersed liquid crystal (HPDLC) is used to record holographic diffraction gratings. Several mixtures of nematic liquid crystals (LC) are used as components of the HPDLC to evaluate their influence in static and dynam…
View article: Influence of Tert-Butylthiol and Tetrahydrofuran on the Holographic Characteristics of a Polymer Dispersed Liquid Crystal: A Research Line Toward a Specific Sensor for Natural Gas and Liquefied Petroleum Gas
Influence of Tert-Butylthiol and Tetrahydrofuran on the Holographic Characteristics of a Polymer Dispersed Liquid Crystal: A Research Line Toward a Specific Sensor for Natural Gas and Liquefied Petroleum Gas Open
Tert-Butylthiol (TBT) and tetrahydrothiophene (THT) are odorant substances added to natural gas and liquefied petroleum gas to help their detection by the human smell. In this research, TBT and THT are incorporated into a holographic polym…
View article: Holographic lenses stored in Biophotopol
Holographic lenses stored in Biophotopol Open
Innovative technologies demand versatile and environmentally compatible optical elements. In this paper we evaluated the quality of volume phase transmission lenses stored in a biocompatible photopolymer. Holographic lenses (HL) have been …
View article: Holographic Lenses in an Environment-Friendly Photopolymer
Holographic Lenses in an Environment-Friendly Photopolymer Open
In this paper, we theoretically and experimentally evaluated the quality of volume phase transmission lenses stored in an environmentally friendly photopolymer. Holographic lenses (HLs) were obtained using symmetrical and asymmetrical expe…
View article: Optimization of Photopolymer Materials for the Fabrication of a Holographic Waveguide
Optimization of Photopolymer Materials for the Fabrication of a Holographic Waveguide Open
In this work, we present a method of manufacturing an optical see-through display based on a holographic waveguide with transmission holograms that couple the incident light between air and the glass substrate, accomplishing total internal…
View article: Diffractive optical elements recorded in different photopolymers
Diffractive optical elements recorded in different photopolymers Open
We have fabricated and characterized diffractive phase optical elements (DOEs) such as diffractive lenses or blazed gratings in three different photopolymers using a liquid crystal on silicon (LCoS) spatial light modulator as a master.
View article: Additives Type Schiff’s Base as Modifiers of the Optical Response in Holographic Polymer-Dispersed Liquid Crystals
Additives Type Schiff’s Base as Modifiers of the Optical Response in Holographic Polymer-Dispersed Liquid Crystals Open
Schiff’s bases with specific π-electron system have been synthesized and used as additives in holographic polymer-dispersed liquid crystals. It was observed that these substances modify different parameters such as current intensity, volta…
View article: Shrinkage measurement for holographic recording materials
Shrinkage measurement for holographic recording materials Open
There is an increasing demand for new holographic recording materials. One of them are photopolymers, which are becoming a classic media in this field. Their versatility is well known and new possibilities are being created by including ne…
View article: Multiplexed holograms recorded in a low toxicity Biophotopol photopolymer
Multiplexed holograms recorded in a low toxicity Biophotopol photopolymer Open
Multiplexed diffraction gratings were recorded in 300 μm thick layers of Biophotopol photopolymer by using peristrophic multiplexing schema. Thirteen sinusoidal phase gratings were stored in a low toxicity recording medium. The diffraction…
View article: Peristrophic multiplexed holograms recorded in a low toxicity photopolymer
Peristrophic multiplexed holograms recorded in a low toxicity photopolymer Open
Multiplexed diffraction gratings were recorded in 300 μm thick layers of biophotopol photopolymer by using two peristrophic multiplexing schemes separately and in combination. In addition, it was shown that riboflavin may be used as polyme…
View article: Effective modeling of PA-LCoS devices and application in data storage in photopolymers
Effective modeling of PA-LCoS devices and application in data storage in photopolymers Open
Parallel aligned liquid crystal on silicon (PA-LCoS) devices are widely used in many optics and photonics applications to control the amplitude, phase and/or state of polarization (SOP) of light beams. We present a novel model enabling to …
View article: Analysis of holographic data storage using a PA-LCoS device
Analysis of holographic data storage using a PA-LCoS device Open
Holographic data storage systems (HDSS) have been a promising and very appealing technology since the first laser developments in the sixties. Impact of ongoing advances in the various components needs to be explored in its specific applic…