Invited Lectures

Invited Lectures2019-02-12T10:05:44+00:00

INVITED LECTURES

Dr. Peter R. T. Munro

University College London, UK

Dr Munro currently holds a Royal Society University Research Fellowship in the Department of Medical Physics and Biomedical Engineering at University College London. His primary expertise is in the use of mathematical and computational techniques to improve and quantify biomedical imaging techniques. He developed the first realistic models of image formation in both optical coherence tomography and confocal microscopy. He also developed the first approach to phase retrieval using the edge-illumination X-ray phase imaging technique. Current applications of his work include breast and oesophageal cancer imaging. Dr Munro completed his PhD in the Department of Physics at Imperial College in 2006 and has previously held post-doctoral positions at Imperial College, University College London and the University of Western Australia.

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It is difficult to overstate the importance of optical microscopy to biomedical research. Furthermore, there exists a very broad array of microscope modalities, e.g., fluorescence, Zernike phase contrast and differentia and optical coherence microscopy. The choice of which modality, or modalities, to use depends on the application. Understanding the essentials of image formation in optical microscopy allows for making a better decision as to which is the most appropriate modality for a particular application, and how best to apply the chosen imaging technique. In this talk I will give an overview of the fundamentals of image formation in diffraction limited optical imaging systems. I will discuss these fundamentals in the context of currently used techniques such as super-resolution microscopy, optical coherence microscopy, confocal microscopy and various phase sensitive techniques.

Dr. Haim Suchowski

Tel Aviv University, Israel

Haim Suchowski is an assistant Professor at the department of Condensed Matter Physics, the school of Physics and Astronomy, Tel Aviv University. He performed his postdoctoral research in the group of Prof. Xiang Zhang at University of California, Berkeley (2014), and his Ph.D at the Weizmann Institute of Science under the supervision of Prof. Yaron Silberberg (2011). He holds a B.A. in Physics (2004) and a B.Sc. in Electrical Engineering (2004) from Tel Aviv University, and a M.Sc in Physics (2006) from the Weizmann Institute of Science.

His research focuses in exploring ultrafast dynamics in condensed matter physics, plasmonic nanostructures, Silicon Photonics and 2D materials. Also perform research in quantum coherent control of atoms and molecules with ultra-short laser pulses, and analogous schemed in nonlinear optics. Haim Suchowski has 39 articles and 10 patents. He received the Fulbright postdoctoral fellowship and was awarded recently the ERC grant for his project “MIRAGE 20-15”.

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Remarkable breakthroughs in science throughout history are inherently linked to advances in the study of light-matter interactions. The understanding of new physical concepts and the development of novel optical tools were the driving forces behind ground-breaking multi-disciplinary discoveries in a variety of research fields. For the past two decades we have witnessed major advances in nano-optics and ultrafast physics, allowing for the exploration of phenomena in higher spatial and temporal resolution than ever before. In my talk I will share with you our efforts and success in merging these extreme resolution capabilities in order to study ultrafast phenomena at nanoscale resolution. Such developments allow us to observe and in the future to control ultrafast phenomena in a spatio-temporal window of 20fs-15nm at various wavelength regimes from the visible to the mid-infrared. The mid-infrared wavelength regime is of particular importance to materials science, chemistry, biology and condensed matter physics, as it covers the fundamental vibrational absorption bands as well as of many molecules and solid state materials. In particular, I will present our recent achievements in combining ultrabroadband sources with our scattering near field microscope allowing observation of the broad frequency response as well as the ultrafast transient dynamics of plasmonic systems and in multilayer WSe2.

Prof. Dobrosława Kasprowicz

Poznan University of Technology, Poznan, Poland

Dr. hab. Dobrosława Kasprowicz is Associate Professor at the Poznan University of Technology, Faculty of Technical Physics, Institute of Materials Research and Quantum Engineering and the Head of the Division of Optical Spectroscopy. The scientific activity is focused on designing and characterizing of rare earth doped crystals using optical spectroscopy methods and μ-Raman spectroscopy. Her efforts have been specifically focused on systems with up-converted luminescence and/or nonlinear optical NLO effects and their applications in new generation optical devices.

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Owing to their unique luminescence properties, the rare earth ions doped up-conversion materials have been extensively studied in recent years and widely applied in optical devices such as lasers, optical sensors, solar cells, light emitting diodes (LEDs), 3D displays or optical amplifiers for fiber-optic communication. During the lecture the spectroscopic properties of KGd(WO4)2 micro-crystalline powders doped with selected Pr3+, Eu3+, Tb3+, Ho3+, Er3+, Tm3+ and/or Yb3+ ions, studied by the μ-Raman spectroscopy and optical spectroscopy methods, will be presented. In the proposed systems Yb3+ ions were used as energy sensitizers and the up-converted luminescence originated from the transitions between the energy levels of other co-doped rare earth ions. It was shown that all investigated systems exhibited multicolor up-conversion fluorescence under 980 nm laser irradiation. The investigated materials are very promising as a new generation energy converters with significant potential applications in novel optical devices.

Dr. Gaspar Armelles

IMM-CNM, CSIC, Madrid, Spain

Gaspar Armelles is research professor at the Institute of Micro and Nanotechnology  (IMN-CNM, CSIC) in Tres Cantos (Madrid). He obtained his PhD degree in Physics  from the University of Valladolid (Spain) and the I.N.S.A. Toulouse (France).  He has been director of IMN  from  April-2005 to April- 2009. His research activity is focused on the optical and magnetooptical properties of systems combining magnetic and plasmonic functionalities, as well as  new approaches for active control of plasmonic properties using magnetic fields.

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Plasmonics has proven to be a powerful tool to improve the performance of optical  devices. The possibility of modulating the emission, propagation and/or detection of radiation constitutes a promising aspect to expand the limits of the currently used technologies. In this sense, fast and contactless actuation on plasmon resonances via the Magneto-Optical (MO) effect has been put forward by the inclusion of ferromagnetic components into noble metal layers and nanostructures, yet up to now restricted to the visible and near-infrared ranges.  Recently it has been shown that this magnetic field modulation can be extended to the mid -IR and THz region  by the use of the Magneto-Refractive (MR) effect, i., a change in the optical properties of the system by magnetic field controlled electrical resistivity. In this talk we will review  the effect that a magnetic field has  on the plasmon properties and in particular this new approach  for magnetic modulation in the mid  and far IR range.

Prof. Mérab Kokaia

Lund University, Lund, Sweden

Neuroscience, Neurology: we explore the role of neuropeptides and neurotrophic factors in modulation of excitatory and inhibitory synaptic transmission and epileptogenic in the brain. We use rats and transgenic mice in combination with in vivo epilepsy models (kindling, status epilepticus) and in vitro approaches (patch-clamp in brain slices, optogenetics). One of the specific aims of this research line is to use both direct and indirect targeted gene transfer of neuropeptides and neurotrophic factors into the different brain regions to investigate mechanistic aspects of their action on synaptic transmission and epileptogenic. We also explore seizure-suppressant effects of optogenetic and chemogenetic approaches in vitro and in vivo in animal models of epilepsy. This research will help in better understanding of the mechanisms for epileptogenesis and might lead to development of new gene therapy-based strategies for epilepsy treatment.

Head of Neurology Center, Lund, Sweden

Prof. Olivier Martin

École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland

Olivier is professor of Nanophotonics and Optical Sign al Processing at the Swiss Federal Indtitutge of Technology (EPFL), where is head of the metrology Laboratort and Director of the Microengineering Section. He develops a comprehensive research that combines the development of numeric al techniques for then solution of Maxwell equations with the advanced nanofabrication and experiments on plasmonic systems.

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Nonlinear optics is a fascinating topic of modern optics, which has been made possible by the developments of ultrafast lasers. Nonlinear optical phenomena usually resort to specific bulk crystals with a strong nonlinear susceptibility. In this lecture, I will explore another way of realizing nonlinear optical effects, using plasmonic nanostructures. Such nanostructures do not exhibit a strong bulk nonlinear susceptibility; yet, they can be used to produce nonlinear effects, such as second harmonics that originate from the surface of the metal. The different mechanisms that lead to nonlinear effects in plasmonic nanostructures will be described and I will show how they can be enhanced by the strong near-field produced by plasmonic nanostructures and how the symmetry and the modes of the system control these nonlinear effects. The lecture will not assume much knowledge about nonlinear optics and introduce the different concepts, as they are required.

 

Prof. Kjeld Pedersen

Aalborg University, Aalborg, Denmark

Kjeld Pedersen is professor in physics and Head of Department of Materials and Production at Aalborg University, Denmark. His research focus is on electronic and optical properties of surfaces, interfaces, and nanostructures in thin film systems. He has extensive experience in applications of nonlinear optical methods, including microscopy, to studies of nanoscale materials for solar energy, plasmonica, and semiconductor technology.

Renewable energy generation technologies based on solar radiation are gaining impact on our energy infrastructure with direct illumination of photovoltaic cells as the dominating technology. However, solar concentrators combined with designed absorbers enable interesting technologies, both for electricity and heat generation. Since the efficiency of thermal systems grows fast with temperature development of absorber/emitter systems that can stand high temperatures is essential. At the same time these materials have to be structured on the nanoscale (thin film stacks, nano pillars and discs) in order to design their spectral properties. However, the thermal stability of nanoscale structures is generally very different from that of the constituent bulk materials. Thermophotovoltaics (TPV) is a technology where a combined solar absorber/thermal emitter element is inserted in front of the photovoltaic cell. With a thermal emitter designed to match the band gap of the PV cell this construction may significantly enhance the solar to electric efficiency compared to direct illumination of a PV cell. Furthermore, the technology may be optimized for other thermal sources, such as burning of hydrocarbon fuel or waste products.

Analyses of strategies for different TPV systems will be treated. Several 1D, 2D, and 3D nanostructured materials that have been investigated in order to tailor absorption and emission properties to the radiation source and photosensitive element will be presented. Basic challenges and goals for future developments will be discussed.

Dr Jana B. Nieder

International Iberian Nanotechnology Laboratory, Braga, Portugal

Jana Nieder aims to foster talent and excellence in photonics research at INL and to built and consolidate INL partnerships with universities and private partners to advance photonics research and innovation with impact to the benefit of society. Her research focus is on using and developing photonic techniques to advance our understanding of life at the nanoscale and to advance the development of functional nanomaterials with applications in quantum technologies, (bio-) sensing and nano medicine.

The lecture covers various single molecule detection techniques gives a historical overview of single molecule detection: Low temperature single molecule spectroscopy (SMS), Room temperature techniques. Specifically it will cover femtosecond (fs) pulse compression and fs pulse shaping methods on individual pigment protein complexes. Furthermore the techniques and latest results on single molecule localisation-based super resolution microscopy (SMLS) and near field effects for super resolution microscopy of cell membranes and organelles will be presented. Such super resolution microscopy techniques have shown to enhance the fundamental understanding of cell biologic structures and functions but additionally have the potential to advance nanotechnologies for medicine and biosensing applications.

Dr Martin Lopez-Garcia

International Iberian Nanotechnology Laboratory, Braga, Portugal

Martin Lopez joined INL in May 2017 and he leads the “Natural and Artificial Photonic Structures and Devices” Laboratory in the Nanophotonics Department. He investigates new ways to manipulate light at micro and nano-scale with integrated devices, often relaying on state of the art fabrication and characterization technologies. He is particularly interested in natural photonics on the premise that by seeking inspiration in nature we can learn both design and fabrication methodologies for cost-effective photonic devices.

Martin received his degree in Physics (with a specialization in Optoelectronics) by the University of Santiago de Compostela in 2003. In 2006 he joined the group of Prof. Cefe Lopez in the Material Science Institute of Madrid (ICMM-CSIC) to pursue a PhD hybrid photonic-plasmonic self-assembled photonic crystals which he obtained in 2011. In 2012 he joined the Photonics Group of the University of Bristol (UK) to work with Prof. John Rarity and Dr. Ruth Oulton in the development of photonic devices for quantum information technologies. Simultaneously and together with Dr. Heather Whitney he led the investigation of photosynthetic photonic structures at the University of Bristol.

TBD

Dr Pieter De Beule

International Iberian Nanotechnology Laboratory, Braga, Portugal

Pieter De Beule is currently staff researcher of the INL Medical Devices group within the Department of Life Sciences, leading a research team focusing on the development of new optics inspired technology for the nanosciences. Pieter joined the installation commission of the INL back in 2009 and was detached to the Max-Planck Institute for Biophysical Chemistry in Göttingen, Germany, for a period of two years working with Dr. Thomas Jovin at the laboratory of Cellular Dynamics on the development of a new type of optical microscope. In 2011, Pieter started at the new INL facilities in Braga to set up the optical microscope facilities and develop his independent research lines.

TBD

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