Wel­come to the De­part­ment of The­or­et­ic­al Elec­tric­al En­gin­eer­ing (TET)

Re­search

Our research focuses on the theoretical description, simulation and optimal design of photonic and optoelectronic systems, the further development and combination of simulation methods for electrodynamics with non-linear and complex material models and state-of-the-art optimisation methods.

Teach­ing

The department offers several courses in the field of theoretical foundations of Electrical Engineering and numerical simulation. Advanced courses provide an insight into electromagnetic field simulation and photonic systems.

The team

We are a mixed international team of researchers with a passion for various aspects of Electrical Engineering, Optoelectronics, Photonics and related research fields.

„With the Institute for Photonic Quantum Systems (PhoQS), the Center for Optoelectronics and Photonics Paderborn (CeOPP), the Paderborn Centre for Parallel Computing (PC2) and many research groups in the field of optoelectronics and photonics, Paderborn offers an excellent research environment.”

Jens Förstner,
Leiter des Fachgebiets

„We offer a wide variety of courses for students, ranging from the theoretical foundations of electromagnetism and numerics to research-related advanced courses on field simulation and photonics.”

Prof. Dr. Jens Förstner,
Leiter des Fachgebiets

News from the de­part­ment

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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Re­cent pub­lic­a­tions

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.


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

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

Analyse und Modellierung eines induktiven Ortungsprozesses unter Berücksichtigung der elektromagnetischen Wechselwirkungen planarer Spulensysteme

S. Lange, Analyse und Modellierung eines induktiven Ortungsprozesses unter Berücksichtigung der elektromagnetischen Wechselwirkungen planarer Spulensysteme, Universitätsbibliothek Paderborn, Paderborn, 2025.

DOI

Modeling and simulation of the behavior of piezoceramics with the discontinuous Galerkin method

C. Spieker, J. Förstner, J. Hölscher, L. Claes, B. Henning, in: 2025 International Congress on Ultrasonics, AMA Service GmbH, Paderborn, 2025, pp. 126–129.

DOI

Multiscale thermo-piezoelectric simulations using the finite element method

J. Hölscher, O. Friesen, L. Claes, C. Spieker, J. Förstner, B. Henning, in: 2025 International Congress on Ultrasonics, AMA Service GmbH, Paderborn, 2025, pp. 130–133.

DOI

Estimation of losses caused by sidewall roughness in thin-film lithium niobate rib and strip waveguides

M. Hammer, S. Babel, H. Farheen, L. Padberg, J.C. Scheytt, C. Silberhorn, J. Förstner, Optics Express 32 (2024) 22878.

DOI PDF

From Swiss-cheese to discrete ferroelectric composites: assessing the ferroelectric butterfly shape in polarization loops

V. Myroshnychenko, P.M. Mulavarickal Jose, H. Farheen, S. Ejaz, C. Brosseau, J. Förstner, Physica Scripta 99 (2024) 045952.

DOI PDF

Symmetry-protected TM modes in rib-like, plus-shaped optical waveguides with shallow etching

N. Üstün, H. Farheen, M. Hammer, J. Förstner, Journal of the Optical Society of America B 41 (2024) 2077.

DOI PDF

An efficient compact blazed grating antenna for optical phased arrays

H. Farheen, S. Joshi, J.C. Scheytt, V. Myroshnychenko, J. Förstner, Journal of Physics: Photonics 6 (2024) 045010.

DOI PDF

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Kon­takt

Jens Förstner
Prof. Dr. Jens Förstner

Head - Professor

Office: P1.5.01.1
Phone: +49 5251 60-3013
E-mail: jens.foerstner@uni-paderborn.de

Office hours:

on request


Nina Prante
Nina Prante

Secretary - Employee

Office: P1.5.01.2
Phone: +49 5251 60-3016
E-mail: prante@tet.uni-paderborn.de

Office hours:

Mo, Tue, Thu: 8.30 a.m - 12.30 p.m.

Wed + Fr: 1.00 p.m. - 5.00 p.m.


Theoretical Electrical Engineering group (TET)

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