Wel­come to the The­or­et­ic­al Elec­tric­al En­gin­eer­ing group (TET)

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Our main research interest is the theoretical description of photonic and optoelectronic systems like optical nanoantennas, dielectric waveguides, photonic crystals, metamaterials, plasmonic systems, or biological photonic structures. Our speciality is the combinations of advanced material models with state-of-the-art numerical methods for the simulation of electromagnetic fields. For students we offer a wide range of courses ranging from the theoretical foundation of electromagnetism and numerics to advanced courses on field simulation and photonics. 

Research: Topics, Publications, Team

Teaching: Course Portfolio, current Courses, current Projects

An­nounce­ments/News

New pub­lic­a­tion: TFLN chan­nel wave­guides of rib and strip type: Prop­er­ties of guided modes

Here is our new publication, published in Optics Continuum, which has been highlighted as an Editor's Pick. https://ris.uni-paderborn.de/record/60891 https://opg.optica.org/optcon/fulltext.cfm?uri=optcon-4-10-2356&id=581886

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26.09.25: De­fense of the Mas­ter's Thes­is of Mar­vin Kösters

On Friday, September 26, Marvin Kösters is going to defend his is Master's Thesis about “Excitation of Semi-Guided Beams in a Dielectric Slab by 3D-Printing-Assisted Coupling from an Optical Fiber” It will take place in P1.5.01.4, starting at 09:00.  We cordially invite everyone to attend!

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30.04.2025: Present­a­tion on "To­po­lo­gic­al Op­tim­iz­a­tion of Lith­i­um Niobate-on-In­su­lat­or (LNOI) Wave­guide Split­ters Us­ing Py­thon MEEP"

On Wednesday, April 30, Md Saidul Islam is going to present the results of his MSc Thesis, titled "Topological Optimization of Lithium Niobate-on-Insulator (LNOI) Waveguide Splitters Using Python MEEP".  The seminar will take place in P1.5.01.4, starting at 11:00.  We cordially invite everyone to attend!

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New pub­lic­a­tion: Guided modes of thin-film lith­i­um niobate slabs

Authors: M. Hammer, H. Farheen, J. Förstner https://ris.uni-paderborn.de/record/56193 https://doi.org/10.1364/optcon.532822

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15.10.2024: Pro­jek­t­vor­trag über die "Op­ti­mier­ung und Sim­u­la­tion ein­er Quanten­punk­t­pho­to­di­ode in CST Mi­crowave Stu­dio"

Am 15. Oktorber 2024, um 13:00 Uhr, findet folgender Projektvortrag im Seminarraum der Theoretischen Elektrotechnik (P1.5.01.4) statt, zu dem wir Sie/Euch gerne einladen würden: Optimierung und Simulation einer Quantenpunktphotodiode in CST Microwave Studio Die Vortragenden sind Boris Arnaud Olinga Olinga und Joel Aime Yamtcheu Ngangmo. Wir freuen uns über zahlreiches Interesse!

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30.09.2024: Mas­ter's pro­ject present­a­tion on "Cal­cu­lat­ing op­tic­al prop­er­ties of met­al and dielec­tric nan­o­particles us­ing fre­quency…

On Monday, 30th of September, the following master's project presentation takes place on Zoom:  Topic: Calculating optical properties of metal and dielectric nanoparticles using frequency domain finite element method and time domain discontinuous Galerkin method Lecturers: Apu Das and Linda Mary Varghese Access data: Zoom-Link: https://uni-paderborn-de.zoom-x.de/j/93686024480?pwd=ekJHL29ycDU3RTJWMWVGZjlVeU5xZz09 Meeting-ID: 936 8602 4480 K…

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The five most re­cent pub­lic­a­tions

Topology-optimized silicon nitride coupler for integrated single-photon emitters

H. Farheen, Y. Chen, P. Chen, A. Kryvobok, S. Peana, A. Senichev, V.M. Shalaev, A. Boltasseva, J. Förstner, A.V. Kildishev, in: X. Ni, W. Cai (Eds.), Photonic Computing: From Materials and Devices to Systems and Applications II, SPIE, 2025.

DOI

TFLN channel waveguides of rib and strip type: Properties of guided modes

M. Hammer, S. Khan, B. Taheri, H. Farheen, J. Förstner, Optics Continuum 4 (2025) 2356.

DOI

Enhancement Of Light-matter Interaction In Topological Waveguides And Resonators

M. Brauckmann, E. Narvaez Castaneda, D. Siebert, B. Brecht, J. Förstner, T. Zentgraf, in: Proceedings of The 15th International Conference on Metamaterials, Photonic Crystals and Plasmonics, 2025.


Evaluation of Measurement Noise Effects in the Close Environment of Equivalent Near-Field Sources

D. Schröder, U. Kiefner, C. Hedayat, J. Förstner, in: 2024 International Symposium on Electromagnetic Compatibility – EMC Europe, IEEE, 2024.

DOI

Guided modes of thin-film lithium niobate slabs

M. Hammer, H. Farheen, J. Förstner, Optics Continuum (2024) 532822.

DOI

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