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

28.10.25: Dis­ser­ta­tion in Ko­op­er­a­tion mit dem Fraunhofer EN­AS

Herr Dr.-Ing. Sven Lange hat seine Promotion mit dem Titel Analyse und Modellierung eines induktiven Ortungsprozesses unter Berücksichtigung der elektromagnetischen Wechselwirkungen planarer Spulensysteme erfolgreich verteidigt. Herzlichen Glückwunsch! Die Erkenntnisse aus Herrn Dr.-Ing. Sven Langes Forschungsarbeit befestigen unser Knowhow im Bereich der RFID- bzw. NFC-basierten induktiven Nahfeldortungsverfahren, das es ermöglicht zum…

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Ca­reer op­por­tun­it­ies in 2026: Gradu­ate Pro­gram PhoQS FU­TURE & In­fra­struc­ture PhoQS

We would like to draw your attention to new job opportunities of the Institute for Photonic Quantum Systems (PhoQS) via this LINK.  Enrich the team with your expertise!

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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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The five most re­cent pub­lic­a­tions

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

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

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

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