@article{3830, abstract = {{The modal properties of curved dielectric slab waveguides are investigated. We consider quasi-confined, attenuated modes that propagate at oblique angles with respect to the axis through the center of curvature. Our analytical model describes the transition from scalar 2-D TE/TM bend modes to lossless spiral waves at near-axis propagation angles, with a continuum of vectorial attenuated spiral modes in between. Modal solutions are characterized in terms of directional wavenumbers and attenuation constants. Examples for vectorial mode profiles illustrate the effects of oblique wave propagation along the curved slab segments. For the regime of lossless spiral waves, the relation with the guided modes of corresponding dielectric tubes is demonstrated.}}, author = {{Ebers, Lena and Hammer, Manfred and Förstner, Jens}}, issn = {{0306-8919}}, journal = {{Optical and Quantum Electronics}}, keywords = {{tet_topic_waveguide}}, number = {{4}}, pages = {{49:176}}, publisher = {{Springer Nature}}, title = {{{Spiral modes supported by circular dielectric tubes and tube segments}}}, doi = {{10.1007/s11082-017-1011-x}}, volume = {{49}}, year = {{2017}}, } @article{3832, abstract = {{Controlling light emission out of subwavelength nanoslit/aperture structures is of great important for highly integrated photonic circuits. Here we propose a new method to achieve direction-tunable emission based on a compact metallic microcavity with double nanoslit. Our method combines the principles of Young’s interference and surface plasmon polaritons interference. We show that the direction of the far-field beam can be controlled over a wide range of angles by manipulating the frequency and relative phase of light arriving at the two slits, which holds promise for applications in the ultracompact optoelectronic devices.}}, author = {{Song, Xiaohong and Wang, Nini and Yan, Ming and Lin, Cheng and Förstner, Jens and Yang, Weifeng}}, issn = {{1094-4087}}, journal = {{Optics Express}}, keywords = {{tet_topic_plasmonics}}, number = {{12}}, pages = {{13207--13214}}, publisher = {{The Optical Society}}, title = {{{Direction-tunable enhanced emission from a subwavelength metallic double-nanoslit structure}}}, doi = {{10.1364/oe.25.013207}}, volume = {{25}}, year = {{2017}}, } @inbook{3836, abstract = {{We apply the Discontinuous Galerkin Time Domain (DGTD) method for numerical simulations of the second harmonic generation from various metallic nanostructures. A Maxwell–Vlasov hydrodynamic model is used to describe the nonlinear effects in the motion of the excited free electrons in a metal. The results are compared with the corresponding experimental measurements for split-ring resonators and plasmonic gap antennas.}}, author = {{Grynko, Yevgen and Förstner, Jens}}, booktitle = {{Recent Trends in Computational Photonics}}, editor = {{Agrawal, Arti}}, isbn = {{9783319554372}}, issn = {{0342-4111}}, keywords = {{tet_topic_numerics, tet_topic_shg, tet_topic_meta}}, pages = {{261--284}}, publisher = {{Springer International Publishing}}, title = {{{Simulation of Second Harmonic Generation from Photonic Nanostructures Using the Discontinuous Galerkin Time Domain Method}}}, doi = {{10.1007/978-3-319-55438-9_9}}, year = {{2017}}, } @article{6552, author = {{Bause, Fabian and Claes, Leander and Webersen, Manuel and Johannesmann, Sarah and Henning, Bernd}}, issn = {{0171-8096}}, journal = {{tm - Technisches Messen}}, number = {{3}}, title = {{{Viskoelastizität und Anisotropie von Kunststoffen: Ultraschallbasierte Methoden zur Materialparameterbestimmung}}}, doi = {{10.1515/teme-2016-0056}}, volume = {{84}}, year = {{2017}}, } @inproceedings{6556, author = {{Claes, Leander and Chatwell, René Spencer and Vrabec, Jadran and Henning, Bernd}}, booktitle = {{PROCEEDINGS -- AMA Conferences 2017}}, isbn = {{978-3-9816876-4-4}}, pages = {{304--309}}, publisher = {{AMA Service GmbH}}, title = {{{A Spectral Approach to Acoustic Absorption Measurement}}}, doi = {{10.5162/sensor2017/C1.2}}, year = {{2017}}, } @inproceedings{6557, author = {{Claes, Leander and Jäger, Axel and Johannesmann, Sarah and Webersen, Manuel and Kupnik, Mario and Henning, Bernd}}, booktitle = {{PROCEEDINGS -- AMA Conferences 2017}}, isbn = {{978-3-9816876-4-4}}, pages = {{605--610}}, publisher = {{AMA Service GmbH}}, title = {{{Acoustic Material Characterization of Additively Manufactured Components}}}, doi = {{10.5162/sensor2017/P2.9}}, year = {{2017}}, } @inproceedings{6559, author = {{Claes, Leander and Zeipert, Henning and Koppa, Peter and Tröster, Thomas and Henning, Bernd}}, booktitle = {{Proceedings of Meetings on Acoustics}}, pages = {{030004}}, title = {{{Additively manufactured acoustic diffuser structures for ultrasonic measurement applications}}}, doi = {{10.1121/2.0000688}}, year = {{2017}}, } @inproceedings{6565, author = {{Jäger, Axel and Johannesmann, Sarah and Claes, Leander and Webersen, Manuel and Henning, Bernd and Kupnik, Mario}}, booktitle = {{2017 IEEE IUS~Proceedings}}, title = {{{Evaluating the Influence of 3D-Printing Parameters on Acoustic Material Properties}}}, year = {{2017}}, } @inproceedings{6566, author = {{Johannesmann, Sarah and Claes, Leander and Webersen, Manuel and Henning, Bernd}}, booktitle = {{Fortschritte der Akustik - DAGA 2017}}, pages = {{999--1002}}, publisher = {{Deutsche Gesellschaft für Akustik e.V. 2017}}, title = {{{Inverser Ansatz zur akustischen Charakterisierung plattenförmiger Materialproben}}}, year = {{2017}}, } @inproceedings{6572, author = {{Jurgelucks, Benjamin and Feldmann, Nadine and Claes, Leander and Henning, Bernd and Walther, Andrea}}, booktitle = {{Proceedings of Meetings on Acoustics}}, pages = {{030010}}, title = {{{Material parameter determination of a piezoelectric disc with triple-ring-electrodes for increased sensitivity}}}, doi = {{10.1121/2.0000707}}, year = {{2017}}, } @inproceedings{6575, author = {{Bause, Fabian and Claes, Leander and Webersen, Manuel and Henning, Bernd}}, booktitle = {{PROCEEDINGS -- AMA Conferences 2017}}, isbn = {{978-3-9816876-4-4}}, pages = {{414}}, title = {{{Ultrasonic measurements in the characterization of viscoelasticity and aging of polymers}}}, doi = {{10.5162/sensor2017/C8.1}}, year = {{2017}}, } @inproceedings{6583, author = {{Feldmann, Nadine and Bause, Fabian and Henning, Bernd}}, booktitle = {{Proceedings – AMA Conferences 2017}}, title = {{{Determining fractional Zener model parameters from low frequency DMA measurements}}}, doi = {{10.5162/SENSOR2017/B1.4}}, year = {{2017}}, } @misc{6591, author = {{Claes, Leander and Feldmann, Nadine and Henning, Bernd}}, title = {{{Spektrale Verfahren zur Bestimmung der akustischen Absorption in fluiden Medien}}}, year = {{2017}}, } @inproceedings{6631, author = {{Klaus, Tobias and Nkrumah, I. and Donkor, M.K.E and Tamakloe, R.Y. and Ampong, F.K. and Krauter, Stefan}}, booktitle = {{Proceedings of the ISES Solar World Congress 2017}}, location = {{Abu Dhabi (United Arab Emirates - UAE)}}, title = {{{Start-up factory Ghana: Creating an enabling environment for the dissemination of renewable energies}}}, year = {{2017}}, } @article{6632, abstract = {{Many processes in industrial and domestic applications require heating or cooling at certain steps of a process. Even if the process itself cannot be shifted towards periods of high PV output (which would be favorable), the heating and cooling necessities can be carried out via an inexpensive thermal storage instead of a costly electrical storage. Examples are: distillation units, washing machines, dishwashers, coolers, freezers. The resulting “shiftability” of power consumption can be a business model by offering that availability of load dispatching on the balancing power market. An example using PCM as cooling storage for refrigerators that has been investigated: A focus of this paper is the use of that load shifting ability to provide balancing power. Another emphasis is on the protection of individual consumer data: To keep the state of use of each individual consumer (actually: interactive consumer or “prosumer”) anonymous, but still performing the sales of balancing power, the orders for load-dispatching can be transmitted via transmitted via a regional, non-individual broadcasting message within the GSM network. Demonstrating DSMs capacities, abilities and limits concerning domestic applications is an important task to prepare large-scale implementation and to convince stakeholders. To reaching that goal, several realistic DSM scenarios for cooling applications and freezers have been developed with the prerequisite that DSM activities are supposed to be without comfort losses and without restrictions for consumers while the limits for lower and upper temperature for food are maintained.}}, author = {{Krauter, Stefan and Prior, Dirk}}, issn = {{1876-6102}}, journal = {{Energy Procedia}}, keywords = {{DSM, load management, load shifting, PCM, thermal storage, balancing power}}, pages = {{210 -- 226}}, title = {{{Minimizing storage costs by substituting centralized electrical storage by thermal storage at the end user, also suppling balancing power for grid operation}}}, doi = {{https://doi.org/10.1016/j.egypro.2017.09.505}}, volume = {{135}}, year = {{2017}}, } @inproceedings{6633, author = {{Bendfeld, Jörg and Balluff, Stefan and Wübbeke, Stefan and Krauter, Stefan}}, booktitle = {{Proceedings of the DEWEK 2017}}, location = {{Bremen}}, title = {{{Performance of MERRA2 Data Compared to Floating LiDAR}}}, year = {{2017}}, } @inproceedings{6634, author = {{Bendfeld, Jörg and Balluff, Stefan and Krüger, J. and Krauter, Stefan}}, booktitle = {{Proceedings of the DEWEK 2017}}, location = {{Bremen}}, title = {{{Short-term wind speed and power prediction for offshore wind farms using neural networks}}}, year = {{2017}}, } @inproceedings{6635, author = {{Bendfeld, Jörg and Krauter, Stefan}}, booktitle = {{Proceedings of the 33rd European Photovoltaic Solar Energy Conference, Amsterdam, (Niederlande), 25.-29. Sept. 2017, S. 1477–1481}}, location = {{Amsterdam}}, title = {{{Update on rankings of conversion efficiencies and energy yield of micro-inverters, including inverters for two PV modules}}}, year = {{2017}}, } @inproceedings{6636, author = {{Bendfeld, Jörg and Krauter, Stefan}}, booktitle = {{Proceedings of the 33rd European Photovoltaic Solar Energy Conference, Amsterdam, (Niederlande), 25.-29. Sept. 2017, S. 1836–1840}}, location = {{Amsterdam}}, title = {{{Long-term performance of PV micro-inverters}}}, year = {{2017}}, } @inproceedings{6637, author = {{Krauter, Stefan and Wendlandt, S. and Süthoff, L. and Berendes, S. and Teubner, J. and Podlowski, L. and Berghold, J. and Grunow, Paul}}, booktitle = {{Proceedings of the 33rd European Photovoltaic Solar Energy Conference, Amsterdam, (Niederlande), 25.-29. Sept. 2017}}, location = {{Aḿsterdam}}, title = {{{Advanced PV Module Hot Spot Characterisation}}}, year = {{2017}}, }