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DTSTART;TZID=Europe/Berlin:20260128T160000
DTEND;TZID=Europe/Berlin:20260128T170000
DTSTAMP:20260423T071935
CREATED:20260112T092717Z
LAST-MODIFIED:20260130T103004Z
UID:6930-1769616000-1769619600@lasers4.eu
SUMMARY:Laserlab-Europe Talk: Laser produced plasmas (LPP) and LPP SXR/EUV sources for laboratory astrochemistry\, 28 January 2026
DESCRIPTION:Speaker: Andrzej Bartnik (MUT-IOE) Date: Wednesday\, 28 January 2026\, 16:00 CET \nMany experiments relevant to various processes in Space were devoted to support interpretation of astronomic observations. The experiments concern formation of astrophysical jets\, photoionized plasmas in accretion disks around compact stars\, supernovae explosions\, matter formed inside giant planets\, formation of interstellar dust\, molecular processes in interstellar ices\, formation of tholins etc. It is so called laboratory astrophysics or astrochemistry. \nSome of these experiments require using of high power discharge or laser systems\, for some experiments\, especially concerning laboratory astrochemistry\, synchrotrons\, VUV lamps or small scale discharge plasma systems were employed. Some experiments can be\, however\, performed using laser produced plasma (LPP) soft X-ray (SXR) or extreme ultraviolet (EUV) sources. Some attempts were performed using sources developed in Institute of Optoelectronics\, MUT. \nThe sources utilize gas puff targets and nanosecond\, Nd:YAG laser systems. The most intense emission in the SXR or EUV range can be obtained from Xe plasmas\, however\, in some cases other gases or aerosols are employed. The sources are equipped with the corresponding EUV/SXR optical systems. Some experiments are performed in an ambient gas\, under low pressure. Both kind of systems\, with and without optics\, can be employed for investigation of molecular processes relevant to SXR/EUV induced processes in interstellar clouds\, atmospheres of planets or comets. Initial experiments were performed\, a series of further experiments is planned. \n			\n			\n				\n				\n				\n				\n			\n				\n				\n				\n				\n				\n				\n				Watch this Talk
URL:https://lasers4.eu/event/lle-talk-laser-produced-plasmas-lpp-sxr-euv-sources-for-laboratory-astrochemistry/
CATEGORIES:Webinars
ATTACH;FMTTYPE=image/png:https://lasers4.eu/wp-content/uploads/lle-talk_thumbnail_bartnik.png
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260225T160000
DTEND;TZID=Europe/Berlin:20260225T170000
DTSTAMP:20260423T071935
CREATED:20260205T132641Z
LAST-MODIFIED:20260227T100225Z
UID:7030-1772035200-1772038800@lasers4.eu
SUMMARY:Laserlab-Europe Talk: Laser processing of functional micro/nanostructures for photonics\, optoelectronics\, and smart surfaces\, 25 Feb 2026
DESCRIPTION:Speaker: Maria Kandyla (National Hellenic Research Foundation)  \nThe need for advanced materials and systems with new functionalities has motivated the development of micro/nanostructures on solid surfaces\, which are necessary for the fabrication of functional devices for novel applications. In this talk\, we will discuss the development of functional micro/nanostructures\, based on laser-processed surfaces. \nCoating micro/nanostructures with thin metallic films results in plasmonic substrates with enhanced electromagnetic response across the entire visible range\, which are used for plasmonic optical trapping [1]. Combining silicon micro/nanostructures with thin semiconducting films results in electronic heterojunctions with increased surface area for improved optoelectronic performance [2]. Furthermore\, isotype heterojunctions result in wavelength-selective\, high-speed photodetectors with self-powered operation\, which can be further engineered by careful selection of the electronic properties of the constituting materials [3\,4]. “Smart” surfaces of controllable extreme wetting states are obtained by combining photoresponsive metal oxides with laser-processed micro/nanostructured substrates\, which can reach complete water repellence without chemical modification [5]. Also\, surfaces with controlled topography\, either at the micro- or at the nano-scale\, for targeted cell cultures for biomedical applications [6]. We will present recent advances in these fields and discuss future applications. \nReferences \n\n	 \nD.G. Kotsifaki\, M. Kandyla\, and P.G. Lagoudakis\, Plasmon enhanced optical tweezers with gold-coated black silicon\, Scientific Reports 6\, 26275 (2016).\nG. Chatzigiannakis\, A. Jaros\, R. Leturcq\, J. Jungclaus\, T. Voss\, S. Gardelis\, and M. Kandyla\, Laser-microstructured ZnO/p-Si photodetector with enhanced and broadband responsivity across the ultraviolet-visible-near-infrared range\, ACS Applied Electronic Materials 2\, 2819 (2020).\nG. Chatzigiannakis\, A. Jaros\, R. Leturcq\, J. Jungclaus\, T. Voss\, S. Gardelis\, and M. Kandyla\, Broadband wavelength-selective isotype heterojunction n+-ZnO/n-Si photodetector with variable polarity\, Journal of Alloys and Compounds 903\, 163836 (2022).\nM.D. Tsanakas\, A. Jaros\, Y. Fleming\, M. Efthimiadou\, T. Voss\, R. Leturcq\, S. Gardelis\, and M. Kandyla\, Wavelength-selective\, high-speed\, self-powered isotype heterojunction n+-ZnO/n-Si photodetector with engineered and tunable spectral response\, Advanced Materials Technologies 10\, 2401740 (2025).\nM. Kanidi\, A. Bardakas\, A. Kerasidou\, A. Anastasopoulos\, C. Tsamis\, and M. Kandyla\, Hierarchical ‘rose-petal’ ZnO/Si surfaces with reversible wettability reaching complete water repellence without chemical modification\, Applied Physics A 129\, 320 (2023).\n \nM. Kanidi\, A. Papadimitropoulou\, C. Charalampous\, Z. Chakim\, G. Tsekenis\, A. Sinani\, C. Riziotis\, and M. Kandyla\, Regulating MDA-MB-231 breast cancer cell adhesion on laser-patterned surfaces with micro- and nanotopography\, Biointerphases 17\, 021002 (2022).\n\n			\n				Watch the Laserlab-Europe Talk
URL:https://lasers4.eu/event/lle-talk-laser-processing-of-functional-micro-nanostructures-for-photonics-optoelectronics-and-smart-surfaces/
CATEGORIES:Webinars
ATTACH;FMTTYPE=image/png:https://lasers4.eu/wp-content/uploads/lle-talk_kandyla_thumbnail.png
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DTSTART;TZID=Europe/Berlin:20260429T160000
DTEND;TZID=Europe/Berlin:20260429T170000
DTSTAMP:20260423T071935
CREATED:20260324T091847Z
LAST-MODIFIED:20260324T091924Z
UID:7185-1777478400-1777482000@lasers4.eu
SUMMARY:Laserlab-Europe Talk: Materials and post-processes for multi-photon lithography\, 29 April 2026
DESCRIPTION:Title: Materials and post-processes for multi-photon lithography\nSpeaker: Dimitra Ladika (VULRC)\nDate: Wednesday\, 29 April 2026\, 16:00-17:00 Central European Summer Time (CEST) \nMulti-photon lithography (MPL) enables the fabrication of true 3D micro- and nanostructures without the need for masks or complex tooling\, directly from computer-aided designs. Owing to these unique capabilities\, MPL has emerged as a powerful manufacturing technique across a wide range of disciplines. The ongoing growth of MPL is closely linked to advances in material design and post-processing strategies. \nIn particular\, the composition of MPL photoresists\, including the presence or absence of photoinitiators\, plays a critical role in defining fabrication thresholds\, resolution\, and the optical properties of the resulting structures. While photoinitiators can enhance polymerization efficiency\, they may also introduce fluorescence and coloration\, limiting their use in certain applications. In contrast\, photoinitiator-free and doped systems offer alternative pathways toward improved optical performance. The interaction of these materials with femtosecond laser irradiation across multiple wavelengths provides additional flexibility for controlling polymerization and tailoring spectral response. \nAdditionally\, post-processing approaches\, such as calcination and surface coatings\, further extend the capabilities of MPL by enabling the fabrication of fully inorganic and spectrally adaptable architectures. These strategies enhance the functionality and stability of the fabricated 3D structures without fundamentally altering the initial material platform. \nOverall\, these developments demonstrate the potential of material-driven approaches in MPL for applications in photonics and optoelectronics. \nRegistration here
URL:https://lasers4.eu/event/laserlab-europe-talk-materials-and-post-processes-for-multi-photon-lithography/
CATEGORIES:Webinars
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DTSTART;TZID=Europe/Berlin:20260520T160000
DTEND;TZID=Europe/Berlin:20260520T170000
DTSTAMP:20260423T071935
CREATED:20260420T084756Z
LAST-MODIFIED:20260420T084803Z
UID:7199-1779292800-1779296400@lasers4.eu
SUMMARY:Laserlab-Europe Talk: Elucidating the Photon Migration Effects in Incubated Chicken Eggs using Time-Domain Diffuse Optics\, 20 May 2026
DESCRIPTION:Title: Elucidating the Photon Migration Effects in Incubated Chicken Eggs using Time-Domain Diffuse Optics Speaker: Lennard van den Tweel (Wageningen University and Research) Date: Wednesday\, 20 May 2026\, 16:00 Central European Summer Time (CEST) \nThe early and non-invasive assessment of chicken embryonic sex and viability is of great interest. This interest is driven by the ethical dilemma surrounding the culling of non-productive day-old male chicks in layer-hen production and by the need to improve hatchery efficiency. Optical techniques are widely investigated for these applications\, but are challenged by the complex optical properties and heterogeneous structure of avian eggs. Here\, we show that chicken eggs display unusual photon trapping behavior due to the eggshell behaving like an integrating sphere\, considerably extending photon time-of-flight. Time-domain diffuse optical spectroscopy (TD-DOS) on egg phantoms\, supported by Monte Carlo simulations and post-dispersive filtering experiments\, rule out fluorescence as the source for the long photon time-of-flight. These results point to diffuse reflections at the inner surface of the eggshell as the source of the long photon time-of-flight. Despite these boundary effects\, the retrieval of internal bulk optical properties remains feasible via inversion of the diffusion approximation after selection of appropriate boundary conditions\, as was demonstrated in incubated eggs. Finally\, phantom experiments illustrate how the integrating sphere affects the temporal response of time-resolved Raman and fluorescence measurements\, highlighting critical challenges in non-invasive optical characterization of avian embryos. \n			\n			\n				\n				\n				\n				\n			\n				\n				\n				\n				\n				\n				\n				Registration
URL:https://lasers4.eu/event/lle-talk-elucidating-the-photon-migration-effects-in-incubated-chicken-eggs-using-time-domain-diffuse-optics-20-may-2026/
CATEGORIES:Webinars
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