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https://doi.org/10.21256/zhaw-21556| Publication type: | Article in scientific journal |
| Type of review: | Peer review (publication) |
| Title: | MHz-repetition-rate, sub-mW, multi-octave THz wave generation in HMQ-TMS |
| Authors: | Buchmann, Tobias Olaf Kelleher, Edmund J. R. Kaltenecker, Korbinian J. Zhou, Binbin Lee, Seung-Heon Kwon, O-Pil Jazbinsek, Mojca Rotermund, Fabian Jepsen, Peter Uhd |
| et. al: | No |
| DOI: | 10.1364/OE.386604 10.21256/zhaw-21556 |
| Published in: | Optics Express |
| Volume(Issue): | 28 |
| Issue: | 7 |
| Pages: | 9631 |
| Pages to: | 9641 |
| Issue Date: | 19-Mar-2020 |
| Publisher / Ed. Institution: | Optical Society of America |
| ISSN: | 1094-4087 |
| Language: | English |
| Subjects: | THz Photonics |
| Subject (DDC): | 540: Chemistry 621.3: Electrical, communications, control engineering |
| Abstract: | We demonstrate the first megahertz (MHz) repetition-rate, broadband terahertz (THz) source based on optical rectification in the organic crystal HMQ-TMS driven by a femtosecond Yb:fibre laser. Pumping at 1035 nm with 30 fs pulses, we achieve few-cycle THz emission with a smooth multi-octave spectrum that extends up to 6 THz at -30 dB, with conversion efficiencies reaching 10-4 and an average output power of up to 0.38 mW. We assess the thermal damage limit of the crystal and conclude a maximum fluence of ∼1.8 mJ·cm-2 at 10 MHz with a 1/e2 pump beam diameter of 0.10 mm. We compare the performance of HMQ-TMS with the prototypical inorganic crystal gallium phosphide (GaP), yielding a tenfold electric field increase with a peak on-axis field strength of 7 kV·cm-1 and almost double the THz bandwidth. Our results further demonstrate the suitability of organic crystals in combination with fibre lasers for repetition-rate scaling of broadband, high-power THz sources for time-domain spectroscopic applications. |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/21556 |
| Fulltext version: | Published version |
| License (according to publishing contract): | Licence according to publishing contract |
| 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 | |
|---|---|---|---|---|
| 2020_Buchmann_etal_MHz-repetition-rate_Optics-Express.pdf | 2.68 MB | Adobe PDF |  View/Open |
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