1,602 search results for “light” in the Public website
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Quantum dot microcavity control of photon statistics
During my PhD research, I studied the photon statistics of light emitted by a microcavity that contains a single quantum dot (QD) on resonance.
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In shape for photoregulation
How does the photoregulation mechanism work in detail?
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Quantum Matter and Optics
Research groups in the Quantum Matter & Optics programme investigate electronic properties of matter and light-matter interactions with emphasis on quantum information.
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Nanoparticle – redox protein biohybrids
Artificial photosynthesis aims to produce fuels from solar energy using chemical processes. In semi-artificial photosynthesis, a hybrid approach is taken using both chemical and biotechnology approaches. We aim to develop hybrid systems between light-harvesting nanoparticles and redox-enzymes (oxidoreductases)…
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Clock disruption in diurnal versus nocturnal migrating fish
Does Artifical Light at Night (ALAN) disrupt seasonal physiological and behavioral patterns in migrating freshwater fish?
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PhD Course Microscopy
This is a yearly event where we move in one week from the physics of light through the composition of the microscope, fluorescence microscopy and end up with some image analysis All the lectures are backed by practicals to really put your obtained knowledge into practice
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Air Quality in the Picture
In the summer of 2023, interested parties set out to map air quality in Leiden. Using a technique by British artist Robin Price, they made the invisible visible to start the conversation about the importance of good air quality.
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Structure and regulation in photosynthesis
Plants, algae and cyanobacteria have the amazing capacity to perform delicate photophysical and photochemical processes of light capture, excitation transfer, charge separation and catalysis in fluctuating living environments. As a consequence, photosynthetic proteins and membranes form dynamic architectures.…
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Imaging of alkyne-functionalized ruthenium complexes for photoactivated chemotherapy
In photoactivated chemotherapy (PACT), a biologically active compound is caged by a light-cleavable protecting group.
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Hot Nanoparticles
Gold nanoparticles show surprisingly strong interactions with light in the visible range, which can be divided into scattering, absorption, and photoluminescence.
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Development of novel anti-cancer strategies utilizing the zebrafish xenograft model
In this thesis, we will utilize embryonic zebrafish tumour models to understand the interaction between engrafted human cancer cells and macrophages from the host, test drug administration modalities and anti-cancer efficacies of newly-developed PDT and PACT compounds, and test a light-triggered liposomal…
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Experiment Square
Are you the scientist of the future? Come experiment with science at the Experiments Square! Make your own slime, discover how rubber can count, play along with the antibiotics game, discover the power of light and much more!
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Lipid bilayers decorated with photosensitive ruthenium complexes
Promotor: E. Bouwman, Co-promotor: S. Bonnet
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Research
Research at the BPOC/SSNMR group is comprised of the following research themes:
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Art
When you walk into the Gorlaeus Building, you will notice it immediately; the artwork 'The Cloud' hangs prominently in the hall and cannot be missed. Artist Jos Agasi designed it especially for this location. ‘Intuition, imagination and creativity. Scientists and artists have more in common than they…
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Searching for life in the Universe
Is there extra-terrestrial life out there? It now looks as though we can sketch out an answer to this enduring question. Leiden Observatory is helping to build new instruments to find the most promising exoplanets.
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Metals in Catalysis, Biomimetics & Inorganic Materials
Coordination chemistry is the chemistry of metal atoms
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Disintegration Stars | Publication by Andrew Littlejohn
It is well known that photography means writing with light. However, the meaning of “with” can be ambiguous. Film can be exposed outside of the camera. Historically, people have done so to render visible other forms of radiation than what we call light. In mid-2013, Andrew Littlejohn took several rolls…
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Formulation of biopharmaceuticals
Formulation of biopharmaceuticals
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Remarks on Swahili manuscripts in Arabic script : layout and orthography of the Utendi wa Yusuf
This article is aimed to shed light on the Swahili-‘Ajam ī manuscripts, focusing on the major Swahili classical genre: the
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Quantum local asymptotic normality and other questions of quantum statistics
Promotor: R. Gill, Co-promotor: P. Massart
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Weighing the Dark: Cosmological Applications of Gravitational Lensing
Promotor: K. Kuijken, Co-Promotor: H. Hoekstra
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Cosmic tomography with weak gravitational lensing
We explored the Universe using weak gravitational lensing, a phenomenon that occurs when light from distant galaxies is bent by the gravitational fields of closer cosmic objects, much like how a lens distorts light.
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High-Contrast Imaging of Protoplanetary Disks
To study how planetary systems come into existence we study much younger systems still in formation.
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Alumni
Former PhD, Bachelor and Master students of the Van Exter Lab
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Research
Research at the MCBIM group is comprised of the following research themes:
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Wolfgang Löffler Lab - Solid State and High Dimensional Quantum Optics
Advancing the understanding of the interaction of light and matter on the single-quantum level is important for near-future quantum technologies but also to answer fundamental questions.
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Michiel de Dood Lab - Quantum Detection
Our group explores the larger domain of quantum measurement. In particular we investigate two themes that are closely connected: The detection of specially prepared quantum states of light and understanding and characterizing quantum photon detectors.
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Pyrrole-based photoswitchable anion receptors
The main goal of this thesis is to achieve advanced control of binding properties in bis-pyrrolic and macrocyclic pyrrolic receptors by light.
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Open Micro Cavities
We develop open micro cavities to trap light in small volumes and thereby increase the interaction with intra-cavity emitters. Important aspects in this development are the optical penetration in the mirrors, coupling between optical modes, and scattering and clipping losses.
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The diverse roles of integrin α3β1 in cancer: Lessons learned from skin and breast carcinogenesis
In this thesis, we aim to shed light on the diverse and often opposing roles of integrin α3β1 in cancer.
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Multi-angle DLS Facility
Multi-Angle Dynamic Light Scattering (MADLS) is a technique that is used to determine properties of particles in suspension. The measurements give the hydrodynamic size distribution of individual particles as well as particle clusters, and assists in the interpretation of the stability of the particles…
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Gold nanorod photoluminescence: applications to imaging and temperature sensing
Promotor: M.A.G.J. Orrit
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Quantum Emitters
We study the dynamics of individual emitters in micro cavities.
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Connecting dots between natural and artificial Photosynthesis
Decentralized plug and play systems for energy production are the future picture of our society. Artificial photosynthetic systems are used for this purpose.
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The interplay between stars, gas and dust in faint star-forming galaxies
When observing star-forming galaxies, we are not only seeing stellar light, but we also see how this interacts with galactic gas and dust. This thesis contains studies of the stellar, nebular and dust properties of low mass star-forming galaxies.
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Manipulating plant metabolomic profiles by seed and plant cutting treatments to enhance plant protection against western flower thrips
How can we manipulate the biotic and abiotic environment to increase thrips resistance in tomato and chrysanthemum? More specifically we ask: How can plant secondary metabolites that are not soluble in water be delivered to plants in seed coating or root dipping treatment? Can bacteria be used to…
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Greenifying industrial biotechnology through the creation of synthetic endosymbionts
Is it possible to synthesize industrially relevant compounds in a sustainable manner through the use of light-capturing cyanobacteria?
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Laboratory animal facilities
We have facilities for various research animals, all of which naturally comply with legal requirements. We take great care of the animals, and our enclosures are designed to meet the specific needs of the different species.
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Research methods
Because we cannot directly ask babies about what they know or what they are thinking about, we must find smart and baby-friendly ways to figure it out! Below you can read about the different methods that we typically use in our studies.
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About
We highly value the precision and clarity brought by the use of analytic tools combined with creative and non-standard attempts to shine new light on the big questions of theoretical philosophy.
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Self-Portrait with Gorget
In this penetrating self-portrait dating from around 1629, Rembrandt presents himself as an aristocratic young man. He enrolled in Leiden University as a student of the arts in 1620, but whether he actually attended lectures is unknown. In his paintings and prints, he incorporated many topics that are…
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The role of hearing signers in the development of channel specific structures in sign languages of deaf communities
In this project, the hypothesis that language contact crucially impacts the development of spatial grammar and phonology is investigated.
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Presents a novel philosophical account of psychedelic experiences, arguing that they can be induced by means other than psychedelics — such as
Presents a novel philosophical account of psychedelic experiences, arguing that they can be induced by means other than psychedelics — such as meditation and yoga.
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Surface plasmon lasers
Surface plasmons (SPs) are surface waves at the interface between a dielectric and a good metal, and are formed by the interaction between light and the free electrons at the metal-dielectric interface. They provide strong field confinement for optical fields, opening new possibilities for enhanced…
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Photothermal studies of single molecules and gold nanoparticles: vapor nanobubbles and conjugated polymers
Promotor: M.A.G.J. Orrit
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Molecular and Nano-Engineering with Iron, Ruthenium and Carbon: Hybrid structures for Sensing
Metal complexes and 2D materials like graphene were combined to produce structures that can function as sensors.
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Plasmonic enhancement of single-molecule fluorescence under one- and two-photon excitation
This thesis aims to improve the detection from ultra-weak single emitter by enhancing their emission properties with plasmonic nanostructures. We exploit the wet-chemically synthesized single crystalline gold nanorods (GNRs) as our basic frameworks in the whole studies, simply because of their unique…
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The Constitutional Revolution of 1908 and Its Aftermath in Trabzon
Selim Ahmetoğlu defended his thesis on 12 February 2019.
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Electroreduction of nitrate and carbon dioxide on copper electrodes: a mechanistic study
In this thesis we have discussed several parameters that affect the electrochemical conversion of enviromentaly harmful molecules such as nitrates and carbon dioxide to more valuable and less deleterious compounds, in order to cast light onto the mechanism of the reaction to achieve an efficient and…