TOPTICA @ IRMMW 2025
Pushing the Frontiers of Terahertz Science
TOPTICA is excited to contribute to IRMMW-THz 2025 in Espoo, Finland with several expert presentations and posters showcasing cutting-edge research enabled by our terahertz technology:
- Dook van Mechelen, Stephan Reschke, Anselm Deninger: “Comparison of LiNbO3 and PCA emitters with a turn-key THz time-domain system”, IRMMW 2025 – Mon. Aug. 18, 14:30, Hall C
- Joshua Hennig, Jens Klier, Stefan Duran, Kuei-Shen Hsu, Jan Beyer, Christian Roeder, Franziska Beyer, Nadine Schueler, Nico Vieweg, Katja Dutzi, Georg von Freymann, Daniel Molter “Simultaneous Charge Carrier Density Mapping of SiC Epilayers and Substrates with Terahertz TDS” IRMMW 2025 – Mon. Aug. 18, 14:45, Hall B
- Janis Kutz, Nico Vieweg, Mira Naftaly, Konstantin Wenzel, Robert Kohlhaas, and Martin Schell „Continuous-Wave Terahertz Imaging of Embedded Multi-Dimensional Codes in 3D-Printed Polyamide Components“ IRMMW 2025 – Tue. Aug. 19, 17:00 (poster session)
- Sebastian Müller, Thomas Puppe, Andrew Gregory, Nico Vieweg, and Mira Naftaly “Characterization of an open resonator with low-permittivity thin films using a frequency-comb locked continuous-wave terahertz spectrometer” IRMMW 2025 -- Wed. Aug. 20, 17:00 (poster session)
- Daniel Stock, Peter Haring Bolivar, Herbert Balzer, Bernhard Fischer, Karl-Heinz Beying, Robert Kohlhaas, Janis Kutz, Katja Dutzi, and Nico Vieweg „Thickness Gauging of Kapton Foil utilizing Terahertz Time-Domain Spectroscopy during Web Processing“ IRMMW 2025 – Thu. Aug. 21, 17:00 (poster session)
Our tech is at the heart of breakthrough terahertz research. Let’s connect in Espoo!
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TOPTICA @ IRMMW 2025 – “Further reading“
If you are interested in more in-depth information, it is worth taking a look at these exciting papers.
TeraScan
Selected literature:
- A. Roggenbuck et al., Coherent broadband continuous-wave terahertz spectroscopy on solid-state samples; New J. Phys. 12 (2010) 43017.
- A. Deninger et al., 2.75 THz tuning with a triple-DFB laser system at 1550 nm and InGaAs photomixers; J. Infrared Milli THz Waves 36 (2015) 269.
- D.W. Vogt et al., High resolution terahertz spectroscopy of a whispering gallery mode bubble resonator using Hilbert analysis; Opt. Express 25:14 (2017) 16860. →
- K. Nallappan et al., Live streaming of uncompressed HD and 4k videos using terahertz wireless links; IEEE Access 6 (2018) 58030 - 58042.
- A. Endo et al., Wideband on-chip terahertz spectrometer based on a superconducting filterbank; J. Astron. Telesc. Instrum. Syst. 5:3 (2019) 035004. →
- R. Sarkar et al., Independently tunable electromagnetically induced transparency effect and dispersion in a multi-band terahertz metamaterial; Nature Scientific Reports 9 (2019) 18068.
- D.W. Vogt et al., Subwavelength thick ultrahigh-Q terahertz disc microresonators; Photonics Research 8:7 (2020) 1-6.
- A. Ingar Romero et al., Visualizing nanometric structures with sub-millimeter waves; Nature Communications 12 (2021) 7091.
- M. Richter et al., High specifcity THz metamaterial‑based biosensor for label‑free transcription factor detection in melanoma diagnostics; Nature Scientific Reports 13 (2023) 20708.
- K. Ben-Atar et al., Amplitude and phase imaging of cw‑THz waves using a photomixing system with coherent detection; J Infrared Milli. Terahz. Waves 46:16 (2025).
TeraScan ultra NEW!
Selected literature:
- S. Müller et al., Ultra-high precision comb-locked terahertz frequency-domain spectroscopy of whispering-gallery modes; APL Photon. 9 (2024) 076109
- S. Müller et al., Photonic, broadband, and high-resolution characterization of a 415 GHz waveguide bandpass filter; IEEE Transact. Terahertz Science Technol. 15:4 (2025) 728
- B. Krause et al., Terahertz photonic heterodyne spectral analysis with (sub-) kHz resolution and 6.5 THz frequency coverage; Preprint, accepted for publication in Nature Communication (2025).
TeraFlash pro
Selected literature:
- N. Vieweg et al., Terahertz-time domain spectrometer with 90 dB peak dynamic range; J Infrared Milli. Terahz. Waves 35:10 (2014) 823.
- M. Naftaly et al., Terahertz and microwave optical properties of single-crystal quartz and vitreous silica and the behavior of the boson peak; Appl. Sci. 11 (2021) 6733.
- M.S. Ergoktas et al., Topological engineering of terahertz light using electrically tunable exceptional point singularities; Science 376 (2022) 184.
- S. Reschke et al., Confirming the trilinear form of the optical magnetoelectric effect in the polar honeycomb antiferromagnet Co2Mo3O8; Nature Quantum Materials 7:1 (2022).
- M. Ljubenovic et al., Beam-shape effects and noise removal from THz time-domain images in reflection geometry in the 0.25 - 6 THz range; IEEE Transactions on THz Science Technol (2022).
- P.P. Cielecki et al., Identifcation of black plastics with terahertz time‑domain spectroscopy and machine learning; Nature Sci. Reports 13 (2023) 22399
- Z. Tagay et al., High-precision measurements of terahertz polarization states with a fiber coupled time-domain THz spectrometer; Opt. Express 32:9 (2024) 15946.
- A. Dohms et al., Fiber-coupled THz TDS system with mW-level THz power and up to 137 dB dynamic range; IEEE Transact. Terahertz Science Technol. (2024).
TeraFlash smart
Selected literature:
- M. Yahyapour et al., Fastest thickness measurements with a terahertz time-domain system based on electronically controlled optical sampling; Appl. Sci. 9 (2019) 1283.
- D. Damyanov et al., High resolution lensless terahertz imaging and ranging; IEEE Access 7:1 (2019) 147704.
- P. Fosodeder et al., Phase-contrast THz-CT for non-destructive testing; Opt. Express 29:10 (2021) 15711.
- K. Post et al., Observation of cyclotron resonance and measurement of the hole mass in optimally doped La2-xSrxCuO42-x; Phys. Rev. B 103 (2021) 134515.
- D. Molter et al., Kilohertz pixel-rate multilayer terahertz imaging of subwavelength coatings; Appl. Sci. 12 (2022) 4964.
- N. Pałka et al., Fast THz-TDS reflection imaging with ECOPS - Point-by-point versus line-by-line scanning; Sensors 22 (2022) 8813.
- P. Fosodeder et al., Fast terahertz reflection imaging for in-line detection of delaminations in glass fiber-reinforced polymers; Sensors 25 (2024).
- J. Wang et al.,THz cyclotron resonance of a 2D hole gas in a GaN/AlN heterostructure; Appl. Phys. Lett. 126 (2025) 213102.