| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Eng, Lukas
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (26/26 displayed)
- 2024Probing Ferroelectric Phase Transitions in Barium Titanate Single Crystals via in-situ Second Harmonic Generation Microscopy
- 2023Impact of Ferroelectric Layer Thickness on Reliability of Back-End-of-Line-Compatible Hafnium Zirconium Oxide Filmscitations
- 2023A Study on Imprint Behavior of Ferroelectric Hafnium Oxide Caused by High-Temperature Annealingcitations
- 2023Polarization Sensitivity in Scattering-Type Scanning Near-Field Optical Microscopy—Towards Nanoellipsometrycitations
- 2022Atomic layer deposition of yttrium iron garnet thin filmscitations
- 2022Effect of Al2O3 interlayers on the microstructure and electrical response of ferroelectric doped HfO2 thin filmscitations
- 2021Aging in Ferroelectric Si-Doped Hafnium Oxide Thin Filmscitations
- 2021Electric field-induced crystallization of ferroelectric hafnium zirconium oxidecitations
- 2021Tricyanidoferrates(−IV) and Ruthenates(−IV) with Non-Innocent Cyanido Ligandscitations
- 2021Influence of Annealing Temperature on the Structural and Electrical Properties of Si-Doped Ferroelectric Hafnium Oxidecitations
- 2021Impact of the SiO2interface layer on the crystallographic texture of ferroelectric hafnium oxidecitations
- 2020Structural and electrical comparison of si and zr doped hafnium oxide thin films and integrated fefets utilizing transmission kikuchi diffractioncitations
- 2016Multidomain Skyrmion Lattice State in Cu2OSeO3citations
- 2015Conductivity and magnetoresistance of La0.7Ce0.3MnO3-δ thin films under photoexcitationcitations
- 2015Optical antennae for near-field induced nonlinear photochemical reactions of photolabile azo-and amine groups
- 2014The Mn2+/Mn3+ state of La0.7Ce 0.3MnO3 by oxygen reduction and photodopingcitations
- 2014Near-field resonance shifts of ferroelectric barium titanate domains upon low-temperature phase transitioncitations
- 2013Strain-mediated elastic coupling in magnetoelectric nickel/barium-titanate heterostructurescitations
- 2010Web-like domain structure formation in barium titanate single crystalscitations
- 2010Poly(2-(dimethylamino)ethyl methacrylate) brushes with incorporated nanoparticles as a SERS active sensing layercitations
- 2010Fabrication of two-dimensional Au@FePt core-shell nanoparticle arrays by photochemical metal depositioncitations
- 2009Probing polarization and dielectric function of molecules with higher order harmonics in scattering-near-field scanning optical microscopycitations
- 2009Ferroelectric Lithographycitations
- 2005Surface photovoltage spectroscopy for the investigation of perovskite oxide interfacescitations
- 2002Metal salt complexation of spin-coated ultrathin diazosulfonate terpolymer filmscitations
- 2002Novel diazosulfonate terpolymers for the preparation of structured functionalized surfaces
Places of action
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booksection
Optical antennae for near-field induced nonlinear photochemical reactions of photolabile azo-and amine groups
Abstract
<p>We performed a series of nonlinear-optical, photochemically-induced ex-periments using different copolymers which were UV-sensitized at around 400 nm through various chemical side groups (e.g. NVOC-protected amines). Our approach focuses on inducing very localized photoreactions on an area much smaller than the diffraction-limited optical spot, using nonlinear optical effects in the near-fields of metallic nanoparticle (NP) antennae embedded in the polymer thin film. We thus illuminated the copolymers with 100 fs pulses at a 790 nm exciting wavelength in order to trigger photoreactions through nonlinear optical effects at around 400 nm. Spin coating the copolymers onto both y-cut lithium niobate (LNO) sample surfaces (which is an excellent SHG amplifier) and onto bare glass surfaces (no SHG) and then comparing the as-induced nonlinear optical photoreactions showed a direct two-photon absorption to be the dominant photoreaction mechanism, while SHG radiation (as emitted by LNO) did not show any significant influence. High efficiency of this process can be achieved by the near-field enhancement close to metallic NPs present in the polymer thin film. First evidence is given here with protected amine side groups when spin coating the copolymer over sharp gold edges as obtained from triangular metallic NPs (i.e. so-called Fischer pattern); after laser exposure at 790 nm, the photochemically deprotected amines were successfully photo-labeled and then imaged by STORM microscopy.</p>