Theodoros T. Koutserimpas

Welcome

I received the diploma degree from the National Technical University of Athens (Εθνικό Μετσόβιο Πολυτεχνείο), in Athens Greece and the PhD degree from the Swiss Federal Institute of Technology in Lausanne (École Polytechnique Fédérale de Lausanne, EPFL), in Lausanne Switzerland.

I am a Swiss-National-Science-Foundation (SNSF) Fellow and a Bodossaki Foundation Scholar. I am the recipient of the Postdoc Mobility Fellowship by SNSF and the “Stamatis G. Mantzavinos” Scholarship by Bodossaki Foundation. I held postdoctoral positions at Princeton University and Cornell University and I am currently a Research Associate at the National Technical University of Athens.

My scientific interests are broad and include (but are not limited to) electrodynamics, optics, computational electromagnetics, acoustics, applied quantum mechanics and developing novel numerical and analytical methods to model wave phenomena and systems.

Feel free to browse my academic website.

News

• 2025-09-22 Honored to be recognized on Stanford University’s list of the World’s Top 2% Scientists (2025).
• 2025-05-30 The paper “Extreme frequency selectivity by synchronized time-modulated metasurfaces” is published in Scientific Reports.
• 2025-04-08 The preview paper “Extending the Smith-Purcell effect into the fourth dimension” is published in Newton.
• 2025-02-05 The paper “Exploring the equivalence of causality-based and quantum mechanics-based sum rules for harmonic generation in nonlinear optical materials” is published in Optical Materials Express and is highlighted as “Editors’ Pick” by the journal editors

Publications

21. T. T. Koutserimpas, F. Monticone and C. Valagiannopoulos, “Extreme frequency selectivity by synchronized time-modulated metasurfaces,” Sci. Rep., 15, 19023 (May 2025), (link).
22. T. T. Koutserimpas, “Extending the Smith-Purcell effect into the fourth dimension,” Newton, 1(2), 100065 (Apr. 2025), (link).
23. T. T. Koutserimpas, H. Li, O. D. Miller and F. Monticone, “Exploring the equivalence of causality-based and quantum mechanics-based sum rules for harmonic generation in nonlinear optical materials,” Opt. Mater. Express, 15(3), 413–424 (Mar. 2025). [Editors’ Pick], (link).
24. H. Li, T. T. Koutserimpas, F. Monticone and O. D. Miller, “Approaching upper bounds to resonant nonlinear optical susceptibilities with inverse-designed quantum wells,” ACS Photonics, 12(2), 889–898 (Feb. 2025), (link).
25. S. F. Koufidis, T. T. Koutserimpas, F. Monticone and M. W. McCall, “Electromagnetic wave propagation in time-periodic chiral media,” Opt. Mater. Express, 14(12), 3006–3029 (Dec. 2024), (link).
26. S. F. Koufidis, T. T. Koutserimpas, F. Monticone and M. W. McCall, “Enhanced scattering from an almost-periodic optical temporal slab,” Phys. Rev. A, 110(4), L041501 (Oct. 2024). [PRA Letter], (link).
27. T. T. Koutserimpas and F. Monticone, “Time-varying media, dispersion, and the principle of causality,” Opt. Mater. Express, 14(5), 1222–1236 (May 2024), (link).
28. S. F. Koufidis, T. T. Koutserimpas and M. W. McCall, “Temporal analog of Bragg gratings,” Opt. Lett., 48(17), 4500–4503 (Sep. 2023), (link).
29. T. T. Koutserimpas and C. Valagiannopoulos, “Multiharmonic Resonances of Coupled Time-Modulated Resistive Metasurfaces,” Phys. Rev. Appl., 19(6), 064072 (Jun. 2023), (link).
30. T. T. Koutserimpas and C. Valagiannopoulos, “Electromagnetic fields between moving mirrors: singular waveforms inside Doppler cavities,” Opt. Express, 31(3), 5087–5101 (Jan. 2023), (link).
31. M. S. Mirmoosa, T. T. Koutserimpas, G. A. Ptitcyn, S. A. Tretyakov and R. Fleury, “Dipole polarizability of time-varying particles,” New J. Phys., 24, 063004 (Jun. 2022), (link).
32. T. T. Koutserimpas, “Parametric amplification interactions in time-periodic media: coupled waves theory,” J. Opt. Soc. Am. B, 39(2), 481–489 (Feb. 2022), (link).
33. T. T. Koutserimpas and R. Fleury, “Electromagnetic Fields in a Time-Varying Medium: Exceptional Points and Operator Symmetries,” IEEE Trans. Antennas Propag., 68(9), 6717–6724 (Sep. 2020), (link).
34. T. T. Koutserimpas, E. Rivet, H. Lissek and R. Fleury, “Active Acoustic Resonators with Reconfigurable Resonance Frequency, Absorption, and Bandwidth,” Phys. Rev. Appl., 12(5), 054064 (Nov. 2019), (link).
35. T. T. Koutserimpas and R. Fleury, “Coupled-mode theory for stationary and nonstationary resonant sound propagation,” Wave Motion, 89, 221–231 (Jun. 2019), (link).
36. T. T. Koutserimpas and R. Fleury, “Electromagnetic Waves in a Time Periodic Medium With Step-Varying Refractive Index,” IEEE Trans. Antennas Propag., 66(10), 5300–5307 (Oct. 2018), (link).
37. E. N. Glytsis, A. D. Papadopoulos and T. T. Koutserimpas, “Review and accuracy comparison of various permittivity-averaging schemes for material discontinuities in the two-dimensional FDFD method: implementation using efficient computer graphics techniques,” Appl. Opt., 57(25), 7303–7313 (Sep. 2018), (link).
38. T. T. Koutserimpas and R. Fleury, “Zero refractive index in time-Floquet acoustic metamaterials,” J. Appl. Phys., 123(9), 091709 (Mar. 2018), (link).
39. T. T. Koutserimpas and R. Fleury, “Nonreciprocal Gain in Non-Hermitian Time-Floquet Systems,” Phys. Rev. Lett., 120(8), 087401 (Feb. 2018). (link).
40. T. T. Koutserimpas, A. Alù and R. Fleury, “Parametric amplification and bidirectional invisibility in PT-symmetric time-Floquet systems,” Phys. Rev. A, 97(1), 013839 (Jan. 2018). [PRA Editors’ Suggestion], (link).
41. T. T. Koutserimpas, A. D. Papadopoulos and E. N. Glytsis, “Applicability and Optimization of the Alternating-Direction-Implicit Iterative Method for the 2-D Finite-Difference Frequency-Domain Solution of Scattering Problems,” IEEE Trans. Antennas Propag., 65(12), 7166–7173 (Dec. 2017), (link).

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