Search query: Exciton–Photonics: From Fundamental Science to Applications

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abstract: Semiconductors in all dimensionalities ranging from 0D quantum dots and molecules to 3D bulk crystals support bound electron hole pair quasiparticles termed excitons. Over the past two decades, the emergence of a variety of low dimensional semiconductors that support excitons combined with advances in nano optics and photonics has burgeoned an advanced area of research that focuses on engineering, imaging, and modulating the coupling between excitons and photons, resulting in the formation of hybrid quasiparticles termed exciton polaritons. This advanced area has the potential to bring about a paradigm shift in quantum optics, as well as classical optoelectronic devices. Here, we present a review on the coupling of light in excitonic semiconductors and previous investigations of the optical properties of these hybrid quasiparticles via both far field and near field imaging and spectroscopy techniques. Special emphasis is given to recent advances with critical evaluation of the bottlenecks that plague various materials toward practical device implementations including quantum light sources. Our review highlights a growing need for excitonic material development together with optical engineering and imaging techniques to harness the utility of excitons and their host materials for a variety of applications.
author_names: S B Anantharaman

Kiyoung Jo

Deep Jariwala
title: Exciton Photonics: From Fundamental Science to Applications.
venue: ACS nano
year: 2021

abstract: Cette these etudie le faconnage de champs electromagnetiques micro ondes dans des cavites presentant des conditions aux limites reconfigurables. Le dispositif experimental s'appuie sur une metasurface electroniquement reconfigurable qui couvre partialement les parois d'une cavite et qui permet ainsi de controler la facon dont les ondes y sont reflechies. Le premier chapitre explore des aspects fondamentaux. D'abord, une etude parametrique du faconnage d'un champ d'ondes electromagnetiques monochromatique et stationnaire en cavite est proposee en fonction d'un degre de controle introduit. Selon la valeur de ce parametre, il est possible de concentrer de l'energie en un endroit donne de la cavite de facon predictible, de reconfigurer totalement cette cavite, ou bien de decider d'obtenir une resonance a une frequence qui n'en supportait pas auparavant. Ensuite, l'imposition d'un comportement chaotique a une cavite de geometrie reguliere est demontree et une application au brassage des modes en chambre reverberante est donnee. Dans la suite, la possibilite d'ajuster le couplage antenne cavite est abordee, et une adaptation parfaite et dynamiquement configurable de l'impedance est proposee. Le reste du premier chapitre considere des champs transitoires. Dans un premier temps, la focalisation spatio temporelle d'une impulsion fortement reverberee dans une cavite en utilisant uniquement le controle spatial des ondes offert par la metasurface est demontree, puis le lien avec le couplage entre les degrees de liberte spatiaux et temporels du milieu de propagation est fait. Enfin, un dispositif permettant la reconfiguration repetee des conditions aux limites d'une cavite en un laps de temps inferieur au temps de vie des photons est realise, et des resultats preliminaires sont montres. Dans le deuxieme chapitre, des applications aux systemes de communication sans fil multi utilisateurs sont proposees. D'abord, dans la limite d'un bas facteur de qualite de la cavite, il est montre qu'un formalisme matriciel permet de decrire l'impact de la metasurface sur le champ. Cette matrice, mesuree sans information de phase, permet alors de focaliser le champ sur une ou plusieurs positions simultanement. Ensuite, la possibilite d'obtenir une diversite de canaux optimale (orthogonalite des canaux) en faconnant idealement le desordre d'un milieu de propagation a l'aide de metasurfaces est etablie. Finalement, le formalisme matriciel est utilise afin d'introduire un concept de calcul analogique realise par le milieu desordonne en faconnant le front d'onde incident. Il est des lors conclu qu'avec une infrastructure standard de Wi Fi dans une maison, en combinaison avec une metasurface simple, cette idee peut etre implementee. Le concept est enfin transpose au domaine optique avec une fibre multimode. Au cours du troisieme chapitre, quelques applications du faconnage d'ondes en milieux reverberants aux capteurs des environnements connectes sont etudiees. D'abord, la possibilite de concentrer des champs electromagnetiques ambients sur des circuits redresseurs afin d'obtenir des tensions de sortie utiles est demontree. De plus, grace aux non linearites intrinseques du redresseur, ceci est possible meme sans avoir un retour direct du redresseur sur l'intensite du champ incident. Ensuite, un detecteur de mouvement hors ligne de vue et intelligent est propose, qui profite d'un co design de sa couche physique et du traitement de donnees. Enfin, il est demontre que meme des objets non cooperatifs dans un environnement complexe peuvent etre localises grace a leur contribution a la diffusion des ondes dans ledit milieu. L'equivalence d'utiliser la diversite frequentielle ou bien le faconnage d'ondes dans ce contexte est etablie.
author_names: del Hougne

Marc Philipp
title: Shaping Green's Functions in Cavities with Tunable Boundary Conditions From Fundamental Science to Applications
year: 2018

title: Nanoscale Zerovalent Iron Particles for Environmental Restoration: From Fundamental Science to Field Scale Engineering Applications
year: 2019

abstract: Academia and industry alike are faced with an ever growing demand for energy efficiency and reduced mass
author_names: Martin F -X Wagner
title: Light Weight Aluminum Based Alloys From Fundamental Science to Engineering Applications
year: 2018

abstract: Moore's law predicts the exponential development of computing systems based on silicon materials and binary algorithms. This imposes high pressure on further component miniaturization and the speed of operation, a trend that challenges the limits of the current technological advance. Conceptually novel ideas and thinking outside the box are needed to overcome these limitations. In this context, the creativity of researchers working at the intersection of chemistry, biology, and physics has opened up several exciting paths in the general area of unconventional computing, including quantum computing and biologically inspired molecular computing. Molecular computing systems, even though they are often motivated by information processing in nature, are not necessarily based on biomolecules and can be equally integrated in tailor made synthetic molecules with stimuli controlled switchable properties. Synthetic molecular systems and nanoscale supramolecular materials have been designed to mimic the operation of Boolean logic gates and demonstrate basic arithmetic and memory functions using light, chemicals, or electrochemistry to address and read them. However, despite the unquestionable progress that has been made in the last fifteen years regarding several practical aspects such as recycled operation, long term stability, and concatenation, the further increase of their complexity is very challenging. Interesting advances in the development of molecular information processing have been achieved with the use of biomolecules, such as DNA/ RNA, proteins/enzymes, and even whole biological cells, conjugating the field with ideas from systems biology. An advantage of the biomolecular computing systems is their ability to be integrated in artificially designed complex chemical processes mimicking multi step information processing networks. These systems are still far away from the efficient and robust information processing in cells, but constitute certainly a viable strategy towards higher complexity. In fact, biochemical reactions are at the core of the mechanism of life itself, and therefore one could set rather ambitious expectations for how far (bio)chemical systems can be scaled up in complexity, if not speed, for information processing.
author_names: Engin U Akkaya

Evgeny Katz

Uwe Pischel
title: Molecular Logic: From Single Logic Gates to Sophisticated Logic Circuits, from Fundamental Science to Practical Applications.
venue: Chemphyschem a European journal of chemical physics and physical chemistry
year: 2017

abstract: 1. Regulation and delivery of neurotrophins 28 1.1. Regulation of BDNF expression 28 1.2. Regulation of BDNF release/delivery 28 2. Neurotrophins in development and growth. .29 3. Neurotrophins in synaptic transmission and plasticity 29 3.1. Pre synaptic modulation 29 3.2. Synaptic plasticity and learning .30 4. Neurotrophins in disease 31 4.1. Autism spectrum disorders 31 4.2. Obesity. .31 4.3. OCD 31 4.4. Addiction 32 4.5. Neurodegenerative disorders 32 5. Translational advances. .32 6. Closing remarks 33 Acknowledgements .33 References 33
author_names: Joshua L Plotkin

Chengbiao Wu
title: Neurotrophin biology at NGF 2016: From fundamental science to clinical applications
venue: International Journal of Developmental Neuroscience
year: 2017

abstract: This reference book originates from the interdisciplinary research cooperation between academia and industry. In three distinct parts, latest results from basic research on stable enzymes are explained and brought into context with possible industrial applications. Downstream processing technology as well as biocatalytic and biotechnological production processes from global players display the enormous potential of biocatalysts. Application of "extreme" reaction conditions (i.e. unconventional, such as high temperature, pressure, and pH value) biocatalysts are normally used within a well defined process window leads to novel synthetic effects. Both novel enzyme systems and the synthetic routes in which they can be applied are made accessible to the reader. In addition, the complementary innovative process technology under unconventional conditions is highlighted by latest examples from biotech industry.
author_names: Lutz Hilterhaus

Andreas Liese

Ulrich Kettling

Garabed Antranikian
title: Applied Biocatalysis: From Fundamental Science to Industrial Applications: From Fundamental Science to Industrial Applications
year: 2016

abstract: Resonance energy transfer (RET) the transport of electronic energy from one atom or molecule to another, has significant importance to a number of diverse areas of science. Since the pioneering experiments on RET by Cario and Franck in 1922, the theoretical understanding of the process has been continually refined. This review presents a historical account of the post Forster outlook on RET, based on quantum electrodynamics, up to the present day viewpoint. It is through this quantum framework that the short range, R 6 distance dependence of Forster theory was unified with the long range, radiative transfer governed by the inverse square law. Crucial to the theoretical knowledge of RET is the electric dipole electric dipole coupling tensor; we outline its mathematical derivation with a view to explaining some key physical concepts of RET. The higher order interactions that involve magnetic dipoles and electric quadrupoles are also discussed. To conclude, a survey is provided on the latest research, which includes transfer between nanomaterials, enhancement due to surface plasmons, possibilities outside the usual ultraviolet or visible range and RET within a cavity.
author_names: Garth A Jones

David S Bradshaw
title: Resonance Energy Transfer: From Fundamental Theory to Recent Applications
venue: Front. Phys.
year: 2019

abstract: Metallo oxide (MO) based bioinorganic nanocomposites promise unique structures, physicochemical properties, and novel biochemical functionalities, and within the past decade, investment in research on materials such as ZnO, TiO2, SiO2, and GeO2 has significantly increased. Besides traditional approaches, the synthesis, shaping, structural patterning, and postprocessing chemical functionalization of the materials surface is inspired by strategies which mimic processes in nature. Would such materials deliver new technologies? Answering this question requires the merging of historical knowledge and current research from different fields of science. Practically, we need an effective defragmentation of the research area. From our perspective, the superficial accounting of material properties, chemistry of the surfaces, and the behavior of biomolecules next to such surfaces is a problem. This is particularly of concern when we wish to bridge between technologies in vitro and biotechnologies in vivo. Further, besides the potential practical technological efficiency and advantages such materials might exhibit, we have to consider the wider long term implications of material stability and toxicity. In this contribution, we present a critical review of recent advances in the chemistry and engineering of MO based biocomposites, highlighting the role of interactions at the interface and the techniques by which these can be studied. At the end of the article, we outline the challenges which hamper progress in research and extrapolate to developing and promising directions including additive manufacturing and synthetic biology that could benefit from molecular level understanding of interactions occurring between inanimate (abiotic) and living (biotic) materials.
author_names: Marion J Limo

Anna Sola-Rabada

Estefania Boix

Veeranjaneyulu Thota

Zayd C Westcott

Valeria Puddu

Carole C Perry
title: Interactions between Metal Oxides and Biomolecules: from Fundamental Understanding to Applications.
venue: Chemical reviews
year: 2018

abstract: Optical forces, generally arising from changes of field gradients or linear momentum carried by photons, form the basis for optical trapping and manipulation. Advances in optical forces help to reveal the nature of light matter interactions, giving answers to a wide range of questions and solving problems across various disciplines, and are still yielding new insights in many exciting sciences, particularly in the fields of biological technology, material applications, and quantum sciences. This review focuses on recent advances in optical forces, ranging from fundamentals to applications for biological exploration. First, the basics of different types of optical forces with new light matter interaction mechanisms and near field techniques for optical force generation beyond the diffraction limit with nanometer accuracy are described. Optical forces for biological applications from in vitro to in vivo are then reviewed. Applications from individual manipulation to multiple assembly into functional biophotonic probes and soft matter superstructures are discussed. At the end future directions for application of optical forces for biological exploration are provided.
author_names: Hongbao Xin

Yuchao Li

Yong-Chun Liu

Yao Zhang

Yun-Feng Xiao

Baojun Li
title: Optical Forces: From Fundamental to Biological Applications.
venue: Advanced materials
year: 2020