Results 31 to 40 of about 233 (148)

Optical storage properties in cast films of an azopolymer

Materials Research, 2003
In this paper we discuss the properties of optically induced birefringence in DR19-MDI cast films that may be used in optical storage applications. The selection of DR19-MDI cast films was based on a comparative study of optical storage properties of ...
Ubaldo Martins das Neves, David Sotero dos Santos Junior, José Alberto Giacometti, Sergio Carlos Zílio, Lino Misoguti, Débora Terezia Balogh, Osvaldo Novais de Oliveira Junior, Cleber Renato Mendonça   +7 more
doaj   +1 more source

Modeling Light‐Induced Synaptic Behavior and Visual Memory of Azopolymeric Compounds

Advanced Optical Materials, Volume 14, Issue 29, 7 August 2026.
In the framework of neuromorphic hardware it is essential to predict the evolution of the internal state of the devices mimicking synaptic functionalities to perform in‐silico modeling of specific computational tasks. Here, we provide a rate‐balance equation model to describe the synaptic‐like response of light‐actuated azopolymeric compounds and ...
Mateo Rosero‐Realpe, Federico Ferrarese Lupi, Gianluca Milano, Angelo Angelini   +3 more
wiley   +1 more source

Cyclo‐Octasulfur Crystals as Light‐Controlled Molecular Muscles

Angewandte Chemie, Volume 137, Issue 34, August 18, 2025.
Bending and stretching effect provoked by the repeated application of 385‐nm radiation (purple) and 475‐nm radiation (blue) on sulfur microcrystals. Abstract Here, we describe the synthesis and photo‐responsive properties of 2D cyclo‐octasulfur microcrystals (α‐S8 MCs), produced using a quick, simple, cost‐effective, and environmentally friendly ...
Enrique Solano‐Rodríguez, Qi Sun, Jean‐Luc Brédas, Veaceslav Coropceanu, Beatriz Jurado‐Sánchez, Alberto Escarpa   +5 more
wiley   +2 more sources

Pixelated Laser with Tailored Emission Spectrum Photopatterned by Digital Holographic Microscopy

Advanced Optical Materials, Volume 14, Issue 17, 8 May 2026.
Azobenzene‐based surface‐relief gratings inscribed via DHM‐integrated holographic lithography enable programmable pixelated DFB laser architectures. This approach allows independent control of grating parameters across a 2D array, enabling spatially tailored emission spectra.
Sudharsana Bhashyam Pillailokam, Alex Berdin, Arri Priimagi   +2 more
wiley   +1 more source

Electro– and photosensitive azopolymer for alignment of liquid crystals

Optics Express, 2015
We report an electro- and photosensitive metal containing polymer material for alignment of liquid crystals (LCs). Irradiation with polarized light and/or application of dc-field result in an anisotropy of the polymer and formation of an easy orientation axes of a LC on the polymer surface.
Denis, Kasyanyuk, Nikolay, Davidenko, Yuriy, Kurioz, Irina, Savchenko, Yuriy, Reznikov   +4 more
openaire   +2 more sources

A new method for patterning azopolymer thin film surfaces [PDF]

Optical Materials, 2017
We present a simple bottom-up approach via an incoherent unpolarized illumination and the choice of a solvent-droplet-induced-dewetting method to photoinducenano doughnuts on the surface of azopolymer thin films. We demonstrate that doughnut-shaped nanostructures can be formed and tailored with a wide range of typical sizes, thus providing a rich field
Sorkhabi, Sh, Barille, R., Ahmadi-Kandjani, S., Zielinska, S., Ortyl, E.   +4 more
openaire   +2 more sources

Quasi‐Single‐Mode Polaritonic Crystal for Hyperbolic Phonon‐Polaritons

Advanced Optical Materials, Volume 14, Issue 13, 3 April 2026.
Near‐field study of the polaritonic Fourier crystal with α‐MoO3 reveals that the hyperbolic phonon‐polaritons within the Type‐I Reststrahlen band may form a quasi‐single‐mode Bloch wave where only the fundamental mode propagates in the crystal. Our results demonstrate the realization of a quasi‐single‐mode regime for the inherently multimode hyperbolic
Sergey G. Menabde, Yongjun Lim, Alexey Y. Nikitin, Pablo Alonso‐González, Jacob T. Heiden, Heerin Noh, Seungwoo Lee, Min Seok Jang   +7 more
wiley   +1 more source

Simple turbulence measurements with azopolymer thin films

Optics Letters, 2013
A simple method to measure the influence on the laser beam propagation by a turbid medium is proposed. This measurement is based on the inscription of a surface relief grating (SRG) on an azopolymer thin film. The grating obtained with a single laser beam after propagation into a turbulent medium is perturbed and directly analyzed by a CCD camera ...
Barille, Régis, Perez, Dario, Morille, Yohann, Zielinska, Sonia, Ortyl, Ewelina   +4 more
openaire   +5 more sources

Biomimetic Adhesion/Detachment Using Layered Polymers with Light‐Induced Rapid Shape Changes

Angewandte Chemie, Volume 137, Issue 23, June 2, 2025.
Geckos achieve rapid adhesion and detachment through their hierarchically structured toe pads. Inspired by this, we developed a crosslinked polymer film with a nanoscale layered structure that undergoes high‐speed, reversible expansion, and contraction under UV light.
Youfeng Yue, Yasuo Norikane, Eiji Nishibori   +2 more
wiley   +2 more sources

Polarization Diffraction Gratings in PAZO Polymer Thin Films Recorded with Digital Polarization Holography: Polarization Properties and Surface Relief Formation

Photonics
In this work, we study the polarization properties of diffraction gratings recorded in thin films of the azopolymer PAZO (poly[1-[4-(3-carboxy-4-hydroxyphenylazo)benzene sulfonamido]-1,2-ethanediyl, sodium salt]) using digital polarization holography ...
Nataliya Berberova-Buhova, Lian Nedelchev, Georgi Mateev, Ludmila Nikolova, Elena Stoykova, Branimir Ivanov, Velichka Strijkova, Keehoon Hong, Dimana Nazarova   +8 more
doaj   +1 more source