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dc.contributor.authorShin, Myeong‐Hoon-
dc.contributor.authorKim, Won Tae-
dc.contributor.authorKim, Se‐In-
dc.contributor.authorLee, Seung‐Heon-
dc.contributor.authorYu, In Cheol-
dc.contributor.authorJazbinsek, Mojca-
dc.contributor.authorYoon, Woojin-
dc.contributor.authorYun, Hoseop-
dc.contributor.authorKim, Dongwook-
dc.contributor.authorRotermund, Fabian-
dc.contributor.authorKwon, O‐Pil-
dc.date.accessioned2020-01-29T10:25:05Z-
dc.date.available2020-01-29T10:25:05Z-
dc.date.issued2019-
dc.identifier.issn2195-1071de_CH
dc.identifier.urihttps://digitalcollection.zhaw.ch/handle/11475/19247-
dc.description.abstractNew 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.de_CH
dc.language.isoende_CH
dc.publisherWileyde_CH
dc.relation.ispartofAdvanced Optical Materialsde_CH
dc.rightsLicence according to publishing contractde_CH
dc.subject.ddc621.3: Elektro-, Kommunikations-, Steuerungs- und Regelungstechnikde_CH
dc.titleEfficient gap‐free broadband terahertz generators based on new organic quinolinium single crystalsde_CH
dc.typeBeitrag in wissenschaftlicher Zeitschriftde_CH
dcterms.typeTextde_CH
zhaw.departementSchool of Engineeringde_CH
zhaw.organisationalunitInstitute of Computational Physics (ICP)de_CH
dc.identifier.doi10.1002/adom.201900953de_CH
zhaw.funding.euNode_CH
zhaw.issue21de_CH
zhaw.originated.zhawYesde_CH
zhaw.publication.statuspublishedVersionde_CH
zhaw.volume7de_CH
zhaw.publication.reviewNot specifiedde_CH
zhaw.webfeedPhotonicsde_CH
zhaw.author.additionalNode_CH
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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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