Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 200 for “"light induced"”.
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Light-induced transformations in biomembranes
Cellular membranes constantly experience remodeling, as exemplified by morphological changes during endo- and exocytosis. Regulation of membrane morphology is essential for these processes. In this work, we attempt to establish a regulation path based on the use of photoswitches exhibiting …
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Light-Induced Electron Transport in Photosynthetic Bacteria
Made available in DSpace on 2014-12-11T00:00:12Z (GMT). No. of bitstreams: 1 7114746.pdf: 3241335 bytes, checksum: d037015607c8fa36b6a74f67404091d9 (MD5) Previous issue date: 1970
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Light-induced currents from oriented purple membrane
This thesis is a report on photocurrent measurements of purple membrane oriented in an polyacrylamide gel. In the first section, the photocurrent measuring system was frequency analyzed from DC to 100 MHz. The optimized conditions that can measure the photocurrent signal in the 70 ms to 32 ns range …
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Light-induced torque at multipolar plasmon resonance
Light-matter interaction provides a powerful means to control mechanical excitation in the nanoscale. The efficiency of this interaction reaches maximum at optical resonance. By understanding and designing the electromagnetic resonance of nanostructures, we can manipulate the electromagnetic field …
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Controlling Light-Induced Flavors in 2% Milk
… commercial retail cases from fluorescent to light emitting-diode lights (LED), however the effect of LED light on milk quality (flavor and nutritional content) has not been thoroughly studied. Packaging efficacy of light protecting additives (LPA) in high-density polyethylene (HDPE) was …
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Visible light-induced pH control and its applications
This work explores how reversible light-induced pH changes can be increased and applied to control pH-responsive systems with light. Chapter 2 investigates how substitution patterns influence the acidity of merocyanine photoacids in the dark as well as under light irradiation. The parameters which …
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Light induced reduction of individual graphene oxide films
Graphene oxide is a promising two-dimensional material with potential applications in many areas. It is basically a graphene basal plane decorated with various oxygen functional groups. By removing the functional groups through reduction, graphene oxide can be reduced to graphene-like films, hence …
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Light-induced many-body correlations in ultracold gases
… quantum correlations in ultracold gases using light. A high-finesse optical cavity is used to enhance the atom-light interaction and we can produce a variety of entangled states which can overcome the standard quantum limit. The quantum correlations are generated by sending very weak light into …
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Light induced degradation in hydrogenated amorphous silicon (a-Si:H)
Light induced degradation in the microstructure and optical properties of a series of hydrogenated amorphous silicon (a-Si:H) layers, deposited by hot wire chemical vapour deposition system (HWCVD) on glass and silicon substrates at different temperatures ranging from 250Light induced degradation …
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Light-Induced Collective Interactions in Arrays of Quantum Emitters
The interaction between light and matter has captivated physicists for centuries, from early studies of vision and refraction in ancient Greece to the development of quantum mechanics and quantum electrodynamics in the past century. While the response of a single quantum emitter to light is well …
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Tracking Light-Induced Synaptic Engrams in in-vitro Neuronal Networks
The concept that activity-dependent synaptic plasticity is at the core of learning and memory is a cornerstone of neuroscience. This intricate process entails synapses' capacity to adjust their strength in reaction to neural circuit activation, facilitating the nervous system's adaptation to …
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Light-induced structural transition and reflectivity of a silica-gallium interface
A broadband optical reflectometer with built-in thermal sample control was developed to study the linear properties of planar silica-gallium interfaces in the continuous range from 450 nm to 1650 nm with increasing and decreasing temperature in the range 12 °C to 36 °C, across the solid to melt …
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Light-induced ferroelectric domain engineering in lithium niobate & lithium tantalate
… micrometres. Through the use of directed laser light, either in the presence or absence of an externally applied electric field, these limitations can be overcome and new fabrication capabilities are revealed. Light-assisted poling is the simultaneous application of an external electric field …
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Ultrafast light-induced dynamics of spins and lattice in iron oxides
Contains fulltext : 75624.pdf (Publisher’s version ) (Open Access)
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The dynamics of ultracold atoms in light-induced synthetic gauge fields
… BEC, we study the dynamics of the BEC in various light-induced synthetic gauge fields. In particular, we have studied the transition between adiabatic and diabatic transport in a spin-orbit (SO) coupled BEC, and found the behavior to be well understood by the Landau-Zener (LZ) theory. Various …
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Role of High Molecular Weight Hyaluronan in Ultraviolet B Light-Induced Transformation
… the most common cancers globally. Ultraviolet light is the key risk factor for these cancers but sunscreen has proven ineffective in their prevention, indicating a need for new prophylactic agents. Chronic elevation of high molecular weight (HMW) tissue hyaluronan (HA) in skin is linked to …
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Extraordinary light-induced local field, angular momentum and force near metallic nanoparticles
The intense local field induced near metallic nanostructures provides strong enhancements for surface enhanced spectroscopies, a major focus of plasmonics research over the past decade. Here we show several different nanoantennas for SEIRA detection, which exhibit an order of magnitude greater …
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Unified treatment of light-induced effects for atomic ensemble in optical cavities
… how an ensemble of 171Yb atoms interact with light in a cavity. Precedents in this direction focused either on the measurement aspect or the lightinduced atomic interaction aspect of photons, while in this thesis I propose a unified way to theoretically consider both. I then consider the best …
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