| Publikationstyp: | Beitrag in wissenschaftlicher Zeitschrift |
| Art der Begutachtung: | Keine Angabe |
| Titel: | Efficient gap‐free broadband terahertz generators based on new organic quinolinium single crystals |
| Autor/-in: | Shin, Myeong‐Hoon Kim, Won Tae Kim, Se‐In Lee, Seung‐Heon Yu, In Cheol Jazbinsek, Mojca Yoon, Woojin Yun, Hoseop Kim, Dongwook Rotermund, Fabian Kwon, O‐Pil |
| et. al: | No |
| DOI: | 10.1002/adom.201900953 |
| Erschienen in: | Advanced Optical Materials |
| Band(Heft): | 7 |
| Heft: | 21 |
| Erscheinungsdatum: | 2019 |
| Verlag / Hrsg. Institution: | Wiley |
| ISSN: | 2195-1071 |
| Sprache: | Englisch |
| Fachgebiet (DDC): | 621.3: Elektro-, Kommunikations-, Steuerungs- und Regelungstechnik |
| Zusammenfassung: | New organic electro‐optic crystals containing orthogonally oriented electron‐withdrawing groups are developed for efficient and gap‐free THz wave generation with a very flat broadband spectral shape. These crystals consist of 2‐(4‐hydroxystyryl)‐1‐methylquinolinium (OHQ) cationic chromophores and nonplanar 4‐(trifluoromethoxy)benzenesulfonate (TFO) anions with orthogonally oriented highly electronegative trifluoromethoxy groups capable of strong hydrogen bonds. OHQ‐TFO crystals exhibit enhanced macroscopic optical nonlinearity with a second harmonic generation efficiency 2.3 times greater than that of benchmark OHQ‐based crystals with conventional planar anions. This enhancement is attributed to reduced edge‐to‐face π–π interactions between cations and anions due to the orthogonal orientation and electron‐withdrawing characteristics of trifluoromethoxy groups. Moreover, OHQ‐TFO crystals exhibit excellent THz wave characteristics generated by optical rectification; 0.52 mm thick OHQ‐TFO crystal generate a peak‐to‐peak THz electric field 15 times higher than that of inorganic standard 1.0 mm thick ZnTe crystal and a broader spectrum with an upper cut‐off frequency near 8 THz at pump wavelengths of 1140–1500 nm. Unlike previously reported state‐of‐the‐art organic electro‐optic salt crystals with strong phonon absorption in the frequency range of 0.8–3 THz, OHQ‐TFO crystals facilitate gap‐free broadband THz wave generation without strong absorption modulations due to the strong hydrogen bond ability of trifluoromethoxy groups. |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/19247 |
| Volltext Version: | Publizierte Version |
| Lizenz (gemäss Verlagsvertrag): | Lizenz gemäss Verlagsvertrag |
| Departement: | School of Engineering |
| Organisationseinheit: | Institute of Computational Physics (ICP) |
| Enthalten in den Sammlungen: | Publikationen School of Engineering |
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Shin, M.-H., Kim, W. T., Kim, S.-I., Lee, S.-H., Yu, I. C., Jazbinsek, M., Yoon, W., Yun, H., Kim, D., Rotermund, F., & Kwon, O.-P. (2019). Efficient gap‐free broadband terahertz generators based on new organic quinolinium single crystals. Advanced Optical Materials, 7(21). https://doi.org/10.1002/adom.201900953
Shin, M.-H. et al. (2019) ‘Efficient gap‐free broadband terahertz generators based on new organic quinolinium single crystals’, Advanced Optical Materials, 7(21). Available at: https://doi.org/10.1002/adom.201900953.
M.-H. Shin et al., “Efficient gap‐free broadband terahertz generators based on new organic quinolinium single crystals,” Advanced Optical Materials, vol. 7, no. 21, 2019, doi: 10.1002/adom.201900953.
SHIN, Myeong‐Hoon, Won Tae KIM, Se‐In KIM, Seung‐Heon LEE, In Cheol YU, Mojca JAZBINSEK, Woojin YOON, Hoseop YUN, Dongwook KIM, Fabian ROTERMUND und O‐Pil KWON, 2019. Efficient gap‐free broadband terahertz generators based on new organic quinolinium single crystals. Advanced Optical Materials. 2019. Bd. 7, Nr. 21. DOI 10.1002/adom.201900953
Shin, Myeong‐Hoon, Won Tae Kim, Se‐In Kim, Seung‐Heon Lee, In Cheol Yu, Mojca Jazbinsek, Woojin Yoon, et al. 2019. “Efficient Gap‐Free Broadband Terahertz Generators Based on New Organic Quinolinium Single Crystals.” Advanced Optical Materials 7 (21). https://doi.org/10.1002/adom.201900953.
Shin, Myeong-Hoon, et al. “Efficient Gap‐Free Broadband Terahertz Generators Based on New Organic Quinolinium Single Crystals.” Advanced Optical Materials, vol. 7, no. 21, 2019, https://doi.org/10.1002/adom.201900953.
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