Published by De Gruyter

Volume 7 Issue 5 - Optical Materials Part 2 / Guest Editors: Younès Messaddeq, Tigran Galstian and Réal Vallée

Issue of Advanced Optical Technologies

Contents
Journal Overview

Publicly Available October 11, 2018

Editorial

Publicly Available September 28, 2018

Making steady progress

Andreas F. Thoss

Page range: 265-266

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Community

Publicly Available September 28, 2018

Topical Issue: Optical Materials Part 2

Review Articles

September 27, 2018

The POLICRYPS liquid-crystalline structure for optical applications

Roberto Caputo, Antonio De Luca, Giuseppe Strangi, Roberto Bartolino, Cesare Umeton, Luciano De Sio, Alessandro Veltri, Svetlana Serak, Nelson Tabiryan

Page range: 273-289

Abstract

We present a review of polymer-liquid crystal-based devices for optical applications. Starting from a particular fabrication technique, which enables to obtain the POLICRYPS (POlymer LIquid CRYstal Polymer Slices) structure, we illustrate different realizations, along with their working principle and main features and performances. The name POLICRYPS indicates a structure made of parallel slices of pure polymeric material alternated to films of well-aligned nematic liquid crystal (NLC), with a spatial periodicity that can be settled in the range 0.2÷15 μm. Suitably designed samples can be utilized as optical devices with a high efficiency, which can be switched on and off both by applying an electric field of a few V/μm or by irradiating samples with a suitable light beam. In different geometries, POLICRYPS can be specialized to operate as switchable diffraction grating, switchable optical phase modulator, switchable beam splitter, or tunable Bragg filter. The POLICRYPS framework can be also used as a soft matter template for aligning different types of LCs or to create an array of tunable microlasers. Finally, we present a POLICRYPS structure with a polar symmetry of the director alignment, which enables local shaping of light polarization, allowing to convert circularly polarized beams into cylindrical vector beams.

Publicly Available October 4, 2018

On the femtosecond laser-induced photochemistry in silver-containing oxide glasses: mechanisms, related optical and physico-chemical properties, and technological applications

Yannick Petit, Sylvain Danto, Théo Guérineau, Alain Abou Khalil, Arthur Le Camus, Evelyne Fargin, Guillaume Duchateau, Jean-Philippe Bérubé, Réal Vallée, Younès Messaddeq, Thierry Cardinal, Lionel Canioni

Page range: 291-309

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Abstract

Laser-induced glass processing has led to huge progress and applications over the last two decades. Here, we review recent advances in femtosecond laser-induced photochemistry in isotropic transparent oxide glasses specifically tailored with silver photoactive agents. The understanding of the influence of the considered glass matrix on the nature and properties of the created silver species is of prime importance. After presenting the key material properties, the formation mechanisms of laser-induced silver-based species are discussed, and potential technological applications are highlighted. Laser-induced processing of silver-containing oxide glasses paved the way for the fabrication of complex integrated waveguides and optical circuits with innovative fluorescent, nonlinear optical, and plasmonic properties. The universality of the method is expected to extend in any glass material that shows a similar laser-induced behavior in terms of silver cluster production.

Research Articles

September 4, 2018

Formation of cross-superposed LIPSSs on bulk chalcogenide glasses using fs-laser

Sandra Helena Messaddeq, Antoine Dumont, Alexandre Douaud, Mohammed El-Amraoui, Younès Messaddeq

Page range: 311-319

Abstract

This paper reports the formation of laser-induced periodic surface structures (LIPSS) observed on the ablated surface of bulk As 2 S 3 chalcogenide glasses produced after irradiation by a focused beam of femtosecond Ti:sapphire (fs)-laser (1 kHz, 100 fs, 800 nm). By controlling the irradiation condition of fs-laser, high spatial frequency LIPSS (HSFL) ripples parallel to polarisation of the incident light are formed. Nanovoids with an average diameter of ~300 nm and depth of 200 nm also appear between the ripples. Furthermore, we show a transition from the HSFL features toward the formation of low-spatial-frequency LIPSS (LSFL) with an intermediated complex structure of ripples, which are oriented simultaneously parallel and perpendicular to the polarisation of the incident light that we call cross-superposed LIPSSs.

August 11, 2018

Design and fabrication of nonlinear optical waveguides for far-detuned wavelength conversion to the mid-infrared

Martin Rochette

Page range: 321-326

Abstract

Highly nonlinear gain media that are optically pumped by rare-earth doped sources have become a promising approach for the fabrication of all-fiber mid-infrared laser sources. This article focuses on the recent progresses of highly nonlinear chalcogenide microwires as practical gain media for far-detuned wavelength conversion towards the mid-infrared.

September 28, 2018

New organic-inorganic hybrid composites based on cellulose nanofibers and modified Laponite

Jhonatan M. Silva, Fernando E. Maturi, Hernane S. Barud, Vera R.L. Constantino, Sidney J.L. Ribeiro

Page range: 327-334

Abstract

The combination of cellulosic materials and clays, such as Laponite, can provide composites with superior optical and mechanical properties compared to pristine cellulose. Synthetic clays can also be used as a host matrix for the immobilization of luminescent complexes, as the incorporated complexes may present enhanced emission quantum efficiency, photo and thermostability compared to the non-immobilized ones. In this way, we, herein, report the preparation of luminescent composites through the incorporation of a Eu(III) complex [Eu 3+ (tta) n ] containing Laponite (Lap) into cellulose nanofibers (CNF). The thermogravimetry results show that the obtained CNF/Lap@[Eu 3+ (tta) n ] films present higher thermal resistance than the CNF film. The Eu 3+ (tta) n species were found in the composite structure with preserved luminescence characteristics, and no leaching or degradation of the organic ligand was observed with the preparation of the composites.

Tutorial

July 20, 2018

Trends in optical design from 1988 to 2018… where to from here?

Irina L. Livshits, Donald C. Dilworth

Page range: 335-341

Abstract

Much experience in practical optical systems design (over 40 years for each author) gives us the perspective to discuss recent trends in advanced optical technologies. We give an ontology of its development and try to make a forecast for the near future, which will be useful for beginners as well as professionals in this complex field.

About this journal

From 2023 onwards, Advanced Optical Technologies will be published by Frontiers.　For more information on submitting to the journal, please see their submissions page.

Objective

Advanced Optical Technologies is a strictly peer-reviewed scientific journal. The major aim of Advanced Optical Technologies is to publish recent progress in the fields of optical design, optical engineering, and optical manufacturing. Advanced Optical Technologies has a main focus on applied research and addresses scientists as well as experts in industrial research and development.

Volume 7 Issue 5 - Optical Materials Part 2 / Guest Editors: Younès Messaddeq, Tigran Galstian and Réal Vallée

Issue of Advanced Optical Technologies

Cover and Frontmatter

Making steady progress

News

Review Articles

The POLICRYPS liquid-crystalline structure for optical applications

Abstract

On the femtosecond laser-induced photochemistry in silver-containing oxide glasses: mechanisms, related optical and physico-chemical properties, and technological applications

Abstract

Research Articles

Formation of cross-superposed LIPSSs on bulk chalcogenide glasses using fs-laser

Abstract

Design and fabrication of nonlinear optical waveguides for far-detuned wavelength conversion to the mid-infrared

Abstract

New organic-inorganic hybrid composites based on cellulose nanofibers and modified Laponite

Abstract

Trends in optical design from 1988 to 2018… where to from here?

Abstract