Advances in coherent optoelectronic cw-THz spectroscopy

Lars Liebermeister; Lauri Schwenson; Milan Deumer; Konstantin Wenzel; Florian Walter; Steffen Breuer; Simon Nellen; Sebastian Lauck; Cornelius Mach; Alexander Jäckel; Enrique Castro-Camus; Martin Koch; Martin Schell; Robert B. Kohlhaas

doi:10.1117/12.3016918

18 June 2024 Advances in coherent optoelectronic cw-THz spectroscopy

Lars Liebermeister, Lauri Schwenson, Milan Deumer, Konstantin Wenzel, Florian Walter, Steffen Breuer, Simon Nellen, Sebastian Lauck, Cornelius Mach, Alexander Jäckel, Enrique Castro-Camus, Martin Koch, Martin Schell, Robert B. Kohlhaas

Author Affiliations +

Proceedings Volume PC12994, Terahertz Photonics III; PC129940D (2024) https://doi.org/10.1117/12.3016918
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

As continuous wave (cw) THz spectroscopy advances rapidly, its high potential for sensing and non-destructive testing is becoming increasingly apparent. This is demonstrated in two recent developments: First, I will present our novel terahertz receivers for frequency-domain spectroscopy based on rhodium-doped InGaAs grown by molecular beam epitaxy. These new devices provide a peak dynamic range of 130 dB, an 18 dB improvement over the state of the art. Secondly, I will present a compact terahertz spectroscopy system with a measurement rate of 1 kHz, made possible by a single photonic integrated circuit that acts as the optical driver engine. These new results demonstrate the excellent performance and flexibility of frequency-domain spectroscopy, paving the way for compact and task-specific terahertz systems for science and industry.

Conference Presentation

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Lars Liebermeister, Lauri Schwenson, Milan Deumer, Konstantin Wenzel, Florian Walter, Steffen Breuer, Simon Nellen, Sebastian Lauck, Cornelius Mach, Alexander Jäckel, Enrique Castro-Camus, Martin Koch, Martin Schell, and Robert B. Kohlhaas "Advances in coherent optoelectronic cw-THz spectroscopy", Proc. SPIE PC12994, Terahertz Photonics III, PC129940D (18 June 2024); https://doi.org/10.1117/12.3016918

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