Niklas Georg

Niklas Georg M.Sc.

+49 6151 16-24393
+49 6151 16-24027

Schloßgartenstr. 8
64289 Darmstadt

Raum: S2|17 33

Arbeitsgebiet(e)

  • Simulation hochfrequenter und optischer Komponenten mit Unsicherheiten

Mehr Informationen

Numerical simulations are well established and play an important role in the design process of electromagnetic components. Thereby, the geometry of the devices and the material properties which are the input data of the numerical simulation, are generally assumed to be known exactly. However, this is not the case in practice, since the manufacturing process introduces (possibly small) variations which usually can only be described statistically. Additionally, there is often a lack of knowledge about the material data due to measurement errors. These uncertainties in the input data can then cause the real components to fail the design specifications. It also favors the choice of disproportionate safety factors. This is especially problematic because of the decreasing size of structures and increasing demands on the components, e.g. in nanotechnology.

Therefore, favored by the continuously increasing computing power, uncertainty quantification (UQ) is a topic of great interest. UQ aims for realistic predictions by describing input data as well as output data as random variables. The probability density function (PDF) of the inputs is then propagated to the outputs, i.e. the quantities of interest (QoIs). In many cases it can also be sufficient to compute a few statistical moments, e.g. mean and standard deviation of the QoI. This could be achieved by applying the well-known Monte Carlo (MC) simulation. However, MC simulation is too computationally expensive for many applications since it needs many (possibly millions) of simulation runs in order to obtain reliable results. In this research, spectral methods for efficient UQ of high-frequency and optical components are investigated. In particular, periodic metamaterials and plasmonic structures are considered which can be subject to relatively huge manufacturing imperfections.

Preise

Young Scientist Award und zweiter Platz beim Best Paper Award auf der URSI HKHB 2019 für den Beitrag 'Improved surrogate modeling for uncertainty quantification of an optical grating coupler'

GnuPG Public Key

BE99 A716 B0F7 EAC8 5C68  3EDE C6F8 0B59 7CF5 66C2

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