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https://doi.org/10.21256/zhaw-22582| Publication type: | Article in scientific journal |
| Type of review: | Peer review (publication) |
| Title: | Ultra‐broadband and high‐dynamic‐range THz time‐domain spectroscopy system based on organic crystal emitter and detector in transmission and reflection geometry |
| Authors: | Puc, Uros Bach, Tobias Günter, Peter Zgonik, Marko Jazbinsek, Mojca |
| et. al: | No |
| DOI: | 10.1002/adpr.202000098 10.21256/zhaw-22582 |
| Published in: | Advanced Photonics Research |
| Volume(Issue): | 2 |
| Issue: | 4 |
| Page(s): | 2000098 |
| Issue Date: | 2021 |
| Publisher / Ed. Institution: | Wiley |
| ISSN: | 2699-9293 |
| Language: | English |
| Subjects: | THz photonics; Terahertz; Spectroscopy; Organic crystal; DSTMS; DAST; Transmission; Reflection |
| Subject (DDC): | 621.3: Electrical, communications, control engineering |
| Abstract: | The terahertz range of the electromagnetic spectrum reveals important insights when studying material properties. An ultra-broadband terahertz time-domain spectroscopy system based on state-of-the-art, high-stability organic nonlinear optical crystals used as both THz wave generator and detector is presented. In transmission geometry, a broad spectrum exceeding 20 THz and a high dynamic range of more than 80 dB is achieved using a compact 100 MHz femtosecond laser working at telecom wavelength 1560 nm. In the normal-incidence reflection geometry, a similar bandwidth with a dynamic range surpassing 60 dB is reported. The experimental results are supported by a complete theoretical model, which includes the pump pulse duration, THz phonon/vibrational modes of the organic crystals and optical/THz beam path optimizations. The effectiveness of the newly developed system is demonstrated by measuring pharmaceutical samples with distinct THz features in the ultra-broadband THz range and by measuring narrow water vapor lines at a spectral resolution of 2.7 GHz (0.090 cm−1), resulting in an excellent accuracy with a frequency deviation of less than 0.05% from the reference values. |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/22582 |
| Fulltext version: | Published version |
| License (according to publishing contract): | CC BY 4.0: Attribution 4.0 International |
| Departement: | School of Engineering |
| Organisational Unit: | Institute of Computational Physics (ICP) |
| Appears in collections: | Publikationen School of Engineering |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2021_Puc-etal_THz-time-domain-spectroscopy-system.pdf | 2.32 MB | Adobe PDF |  View/Open |
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