368 research outputs found

    Photonic Jet: Science and Application

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    Photonic Jet: Science and Application

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    Photonic jets (PJs) are important mesoscale optical phenomena arising from electromagnetic waves interacting with dielectric particles. PJs have applications in super-resolution imaging, sensing, detection, patterning, trapping, manipulation, waveguiding, signal amplification and high-efficiency signal collection, among others. This reprint provides an overview of the field and highlights recent advances and trends in PJ research

    Directional Radiometry and Radiative Transfer: the Convoluted Path From Centuries-old Phenomenology to Physical Optics

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    This Essay traces the centuries-long history of the phenomenological disciplines of directional radiometry and radiative transfer in turbid media, discusses their fundamental weaknesses, and outlines the convoluted process of their conversion into legitimate branches of physical optics

    Sustainable Energy Imaginaries: Utilizing Mie Optics to Reengineer Photobioreactors and Reimagine the Socio-spatial Conditions of Autonomous Energy Production

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    In order to build a more sustainable future, society must transition toward carbon negative energy production and infrastructure. Algae photobioreactors have proven to be an efficient producer of lipid rich oil which can be synthesized into carbon neutral biodiesel. However, the neutrality of such a technology rests in its ability to yield adequate algal biomass through photosynthesis. In order to reach maximum quantum efficiency of algal cells, solar flux must be transformed so that photon absorption can occur without oversaturating the constituent matter. This project looks at the scattering effects of iridocyte-like structures and their potential to create cost effective solar transformers by utilizing the principles of geometrical optics, spherical harmonics, and Mie theory. Additionally, the socioeconomic implications of energy autonomy are considered across communal scales, along with a reimagining of the socio-spatial arrangements behind decentralized energy production. In this way, the project serves as a model of multidisciplinary collaboration and the importance of use value in technological analysis–both of which will prove vital as we reorganize grid infrastructures to accommodate renewable energy

    Synthesis of spherical gold nanoparticles for biomedical applications

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    Tato práce se zabývá syntézou sférických zlatých nanočástic pro biomedicínské aplikace. Zlaté nanočástice byly syntetizovány ekologicky nezávadnými metodami, kterým je věnována i značná část rešerše. Cílem bylo nasyntetizovat stabilní koloidní zlaté nanočástice vhodné pro různé biomedicínké aplikace zejména, pro in vivo a in vitro zobrazovací metody, kterých přehled je take obsažen v teoretické části práce. Také byl proveden test cytotoxicity, jelikož částice mají být použitelné pro in vivo aplikace. Částice byly dale charakterizovány metodami SEM, DLS a UV-VIS.This paper deals with synthesis of spherical gold nanoparticles for various biomedical applications. Gold nanoparticles were synthetized by green methods. Considerable part of this thesis is devoted to green procedures. The aim of this work was to synthetize stable colloid gold nanoparticles suitable for various biomedical applications; especially for in vivo and in vitro bioimaging techniques. Review of these methods is included in theoretical part of this thesis as well. A cytotoxicity test was also provided. Gold nanoparticles were characterized by methods SEM, DLS, UV-VIS.

    Advanced Photonic Sciences

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    The new emerging field of photonics has significantly attracted the interest of many societies, professionals and researchers around the world. The great importance of this field is due to its applicability and possible utilization in almost all scientific and industrial areas. This book presents some advanced research topics in photonics. It consists of 16 chapters organized into three sections: Integrated Photonics, Photonic Materials and Photonic Applications. It can be said that this book is a good contribution for paving the way for further innovations in photonic technology. The chapters have been written and reviewed by well-experienced researchers in their fields. In their contributions they demonstrated the most profound knowledge and expertise for interested individuals in this expanding field. The book will be a good reference for experienced professionals, academics and researchers as well as young researchers only starting their carrier in this field

    Research Report 2008-2009

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    Introduction From the Chairperson Astronomy Atomic Physics Condensed Matter Physics Nuclear Physics Physics Education Research and Public Lectures at WMU Personne
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