Zobrazeno 1 - 10
of 10 611
pro vyhledávání: '"Hammerschmidt, A."'
We present a framework for the efficient and accurate computation of resonance modes in photonic waveguides. The framework is based on AAA rational approximation with the application of special light sources. It allows one to calculate only relevant
Externí odkaz:
http://arxiv.org/abs/2412.13826
Autor:
Manley, Phillip, Hammerschmidt, Martin, Zschiedrich, Lin, Jäger, Klaus, Becker, Christiane, Burger, Sven
Publikováno v:
Proc. SPIE 13014, Photonics for Solar Energy Systems X, 1301404 (2024)
Luminescent coupling is a characteristic of multi-junction solar cells which has often been neglected in models of their performance. The effect describes the absorption of light emitted from a higher band gap semiconductor by a lower band gap semico
Externí odkaz:
http://arxiv.org/abs/2409.15987
Autor:
Morgado, F. F., Stephenson, L. T., Bhatt, S., Freysoldt, C., Neumeier, S., Katnagallu, S., Subramanyam, A. P. A., Pietka, I., Hammerschmidt, T., Vurpillot, F., Gault, B.
Stacking faults (SF) are important structural defects that play an essential role in the deformation of engineering alloys. However, direct observation of stacking faults at the atomic scale can be challenging. Here, we use the analytical field ion m
Externí odkaz:
http://arxiv.org/abs/2408.03167
Publikováno v:
Laser Photonics Rev. 18, 2400584 (2024)
We introduce a theoretical framework for the rational approximation of optical response functions in resonant photonic systems. The framework is based on the AAA algorithm and further allows to solve the underlying nonlinear eigenproblems and to effi
Externí odkaz:
http://arxiv.org/abs/2403.19404
We elucidated the core structure of screw dislocations in ordered B2 FeCo using a recent magnetic bond-order potential (BOP) [Egorov et al., Phys. Rev. Mater. 7, 044403 (2023)]. We corroborated that dislocations in B2 FeCo exist in pairs separated by
Externí odkaz:
http://arxiv.org/abs/2402.10056
Autor:
Si Tang, Xueyu Cheng, Yaqing Liu, Lu Liu, Dai Liu, Qi Yan, Jianming Zhu, Jin Zhou, Yuyang Jiang, Katrin Hammerschmidt, Zhonghua Cai
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-15 (2024)
Abstract Diazotrophic cyanobacteria can fix nitrogen gas (N2) but are usually scarce in nitrogen-limited coastal waters, which poses an apparent ecological paradox. One hypothesis is that high salinities (> 10 g/L NaCl) may inhibit cyanobacterial N2
Externí odkaz:
https://doaj.org/article/bbc31f5a879d41909b42592c640a6cce
Although Niobium is a well characterized material it still shows some anomalies that are not yet understood. Therefore we revisit its metastable phases using density functional theory. First, we systematically compare energies and ground state volume
Externí odkaz:
http://arxiv.org/abs/2310.18111
Autor:
Hammerschmidt, Martin, Zschiedrich, Lin, Siaudinyté, Lauryna, Manley, Phillip, Schneider, Philipp-Immanuel, Burger, Sven
Publikováno v:
Proc. SPIE PC12619, Modeling Aspects in Optical Metrology IX, PC1261907 (2023)
Modelling the scattering of focused, coherent light by nano-scale structures is oftentimes used to reconstruct or infer geometrical or material properties of structures under investigation in optical scatterometry. This comprises both periodic and ap
Externí odkaz:
http://arxiv.org/abs/2309.06109
Autor:
Kuen, Lilli, Betz, Fridtjof, Binkowski, Felix, Schneider, Philipp-Immanuel, Hammerschmidt, Martin, Heermeier, Niels, Rodt, Sven, Reitzenstein, Stephan, Burger, Sven
Publikováno v:
Proc. SPIE 12575, 125750J (2023)
We investigate the calculation of resonance modes of a VCSEL with a Riesz projection eigenvalue solver. The eigenvalue solver is based on the principle of contour integration where for the solution of scattering problems physical right sides are used
Externí odkaz:
http://arxiv.org/abs/2306.02926
Autor:
Plock, Matthias, Hammerschmidt, Martin, Burger, Sven, Schneider, Philipp-Immanuel, Schütte, Christof
Publikováno v:
Metrologia 60, 054001 (2023)
In optical nano metrology numerical models are used widely for parameter reconstructions. Using the Bayesian target vector optimization method we fit a finite element numerical model to a Grazing Incidence X-Ray fluorescence data set in order to obta
Externí odkaz:
http://arxiv.org/abs/2305.02663