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Berlin, Germany

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Gutsche P.,Zuse Institute Berlin | Mausle R.,Zuse Institute Berlin | Burger S.,Zuse Institute Berlin | Burger S.,JCMwave GmbH
Optics InfoBase Conference Papers | Year: 2016

We report on theory and numerics of optical chirality within helical metamaterials. Generation of electromagnetically chiral near-fields is observed. These provide new approaches for tailoring polarization-sensitive emission of lighting devices. © OSA 2016.


McPeak K.M.,ETH Zurich | Van Engers C.D.,ETH Zurich | Blome M.,Zuse Institute Berlin | Blome M.,JCMwave GmbH | And 10 more authors.
Nano Letters | Year: 2014

Silicon wafers are commonly etched in potassium hydroxide solutions to form highly symmetric surface structures. These arise when slow-etching {111} atomic planes are exposed on standard low-index surfaces. However, the ability of nonstandard high-index wafers to provide more complex structures by tilting the {111} planes has not been fully appreciated. We demonstrate the power of this approach by creating chiral surface structures and nanoparticles of a specific handedness from gold. When the nanoparticles are dispersed in liquids, gold colloids exhibiting record molar circular dichroism (>5 × 10 9 M-1 cm-1) at red wavelengths are obtained. The nanoparticles also present chiral pockets for binding. © 2014 American Chemical Society.


Grant
Agency: European Commission | Branch: H2020 | Program: MSCA-ITN-EID | Phase: MSCA-ITN-2015-EID | Award Amount: 3.86M | Year: 2016

The target of this project is to prepare and train future engineers for the design challenges and opportunities provided by modern optics technology. Such challenges include lossless photon management, modelling at the system, components and feature level, and the link between design and technology. Today all optical designs are often perceived following different approaches, namely geometrical optics, physical optics and nano-photonics. Traditionally these approaches are linked to the different lengths-scale that are important to the system. Starting from the entire system that is macroscopic and uses geometrical optics, over the miniaturized unit that is based on micro-optics and needs physical optics design, down to the active nano-photonics entity that allows steering light truly at the nano-scale but which requires to be designed with rigorous methods that provide full wave solutions to the governing Maxwells equations. A design for manufacture of next generation optical applications necessarily requires to bridge the gap between the different length scales and to consider the design at a holistic level. At the core are optical simulation models developed and used in the academic research and the one used for optical designs in industry. Up to now, only the academic partners apply an integral approach to include micro- and nano-photonics in their simulations. Together with the industrial partners projects will be launched to promote the academic developments in optical design and simulation over different length scales towards the industry. The industry will use the know-how to consolidate their expertise, expand their businesses, and occupy new fields of activities. For each research subject, may it be nano-photonics, micro-optics or system engineering, a channel can be provided to access particular knowledge and/or stimulate collaborations.


Grant
Agency: European Commission | Branch: FP7 | Program: CP-FP | Phase: NMP.2011.1.4-5 | Award Amount: 2.16M | Year: 2011

OLED lighting holds the promise of entering the annual global lighting-fixture market that is estimated between $US 50-90 billion. OLED technology provide an environmentally friendly technology that requires no mercury and can enable energy savings up to 90 % (per lamp socket). Global transition to such efficient lighting sources will dramatically reduce energy. Since the onset of the solid state lighting initiative towards the end of last century, the advance in OLED technology has been accelerated by a world-wide investment in material science, process technology, and infrastructure. The technological hurdles are still challenging and numerous, and achieving the target efficiency, colour, colour rendering and lifetime has only partly been accomplished. In the last decade, progress in raising OLED efficiency has stagnated and advanced optical techniques proved to be essential in order to meet the annually growing performance targets. Interest in modelling tools capable of simulating material properties and devices becomes more and more important in order to overcome the remaining fundamental challenges and to accelerate research and development. The overall goal of IM3OLED is the development, evaluation and validation of a predictive multi-scale and multi-disciplinary modelling tool that will accelerate research and development of organic light-emitting diodes for lighting applications. IM3OLED aims to strengthen the leading position of the European OLED Industry by enabling a higher integration level of predictive computational methodologies that accelerate research and development of OLED Lighting technology. Furthermore, accelerated R&D enables an earlier market introduction of OLED Lighting technology in Europe which will create long-term European manufacturing jobs due to the high degree of technical novelty and required specialization.


Soltwisch V.,Physikalisch - Technische Bundesanstalt | Burger S.,Zuse Institute Berlin | Burger S.,JCMwave GmbH | Scholze F.,Physikalisch - Technische Bundesanstalt
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2013

Extreme W scatterometry using radiation in the extreme ultraviolet photon energy range, with wavelengths around 13.5 nm, provides direct information on the performance of EUV optical components, e.g. EUV phoÂ? tomasks, in their working wavelength regime. Scatterometry with horizontal diffraction geometry, parallel to the grating lines (conical), and vertical scattering geometry, perpendicular to the lines (in-plane), was performed on EUV lithography mask test structures. Numerical FEM based simulations, using a rigorous Maxwell solver, compare both experimental set-ups with focus on the sensitivity of the diffraction intensities particularly with respect to the side wall angle. © 2013 SPIE.


Hansen P.-E.,Danish Fundamental Metrology | Burger S.,JCMwave GmbH | Burger S.,Zuse Institute Berlin
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2013

Hollow-core photonic bandgap fibers guide light using diffraction rather than total internal reflection as is the case with normal single- mode communications fibers. The fibers consist of a hollow capillary (~19 micrometers in diameter) surrounded by capillary (~4 micrometers in diameter) arranged in a honey-comb like structure. The honey-comb structure scatters light in the core such that light within the bandgap wavelengths cannot escape from the core. However, the bandgap properties greatly depend on the accuracy with which the microstructures can be controlled during the fabrication process. For measuring the geometrical properties of hollow core photonic crystal fibers with a honeycomb cladding structure we use an angular scatterometric setup. For analyzing the experimentally obtained data we rigorously compute the scattering signal by solving Maxwell's equations with finite-element methods. This contribution focuses on the numerical analysis of the problem. A convergence analysis demonstrates that we reach highly accurate solutions. Our results show very good qualitative agreement between experimental and numerical results. We furthermore demonstrate concepts for accurately monitoring dimensional parameters in the fiber manufacturing process. © 2013 SPIE.


Kato A.,Ruhr West University of Applied Sciences | Burger S.,Zuse Institute Berlin | Burger S.,JCMwave GmbH | Scholze F.,Physikalisch - Technische Bundesanstalt
Applied Optics | Year: 2012

The influence of edge roughness in angle-resolved scatterometry at periodically structured surfaces is investigated. A good description of the radiation interaction with structured surfaces is crucial for the understanding of optical imaging processes such as, e.g., in photolithography. We compared an analytical two-dimensional (2D) model and a numerical three-dimensional simulation with respect to the characterization of 2D diffraction of a line grating involving structure roughness. The results show a remarkably high agreement. The diffraction intensities of a rough structure can therefore be estimated using the numerical simulation result of an undisturbed structure and an analytically derived correction function. This work allows to improve scatterometric results for the case of practically relevant 2D structures. © 2012 Optical Society of America.


Burger S.,Zuse Institute Berlin | Burger S.,JCMwave GmbH | Zschiedrich L.,JCMwave GmbH | Pomplun J.,JCMwave GmbH | And 3 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2013

A method for automatic computation of parameter derivatives of numerically computed light scattering signals is demonstrated. The finite-element based method is validated in a numerical convergence study, and it is applied to investigate the sensitivity of a scatterometric setup with respect to geometrical parameters of the scattering target. The method can significantly improve numerical performance of design optimization, parameter reconstruction, sensitivity analysis, and other applications. © 2013 SPIE.


Hiremath K.R.,Computational Nanooptics Group | Zschiedrich L.,JCMwave GmbH | Schmidt F.,Computational Nanooptics Group
Journal of Computational Physics | Year: 2012

Nonlocal material response distinctively changes the optical properties of nano-plasmonic scatterers and waveguides. It is described by the nonlocal hydrodynamic Drude model, which - in frequency domain - is given by a coupled system of equations for the electric field and an additional polarization current of the electron gas modeled analogous to a hydrodynamic flow. Recent attempt to simulate such nonlocal model using the finite difference time domain method encountered difficulties in dealing with the grad-div operator appearing in the governing equation of the hydrodynamic current. Therefore, in these studies the model has been simplified with the curl-free hydrodynamic current approximation; but this causes spurious resonances. In this paper we present a rigorous weak formulation in the Sobolev spaces . H(curl) for the electric field and . H(div) for the hydrodynamic current, which directly leads to a consistent discretization based on Nédélec's finite element spaces. Comparisons with the Mie theory results agree well. We also demonstrate the capability of the method to handle any arbitrary shaped scatterer. © 2012 Elsevier Inc.


Burger S.,Zuse Institute Berlin | Burger S.,JCMwave GmbH | Lin Z.,JCMwave GmbH | Jan P.,JCMwave GmbH | And 2 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2011

Simulations of light scattering off an extreme ultraviolet lithography mask with a 2D-periodic absorber pattern are presented. In a detailed convergence study it is shown that accurate results can be attained for relatively large 3D computational domains and in the presence of sidewall-angles and corner-roundings. © 2011 SPIE.

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