| Publication type: | Article in scientific journal |
| Type of review: | Peer review (publication) |
| Title: | New benzothiazolium crystals with very large off-diagonal optical nonlinearity |
| Authors: | Kim, Seung-Jun Yu, In Cheol Lee, Ji-Ah Kim, Won Tae Jazbinsek, Mojca Yoon, Woojin Yun, Hoseop Rotermund, Fabian Kwon, O-Pil |
| et. al: | No |
| DOI: | 10.1016/j.dyepig.2021.109433 |
| Published in: | Dyes and Pigments |
| Volume(Issue): | 192 |
| Issue: | 109433 |
| Issue Date: | Aug-2021 |
| ISSN: | 0143-7208 |
| Language: | English |
| Subjects: | THz photonics; Organic crystal; Nonlinear optics; Electro-optics |
| Subject (DDC): | 621.3: Electrical, communications, control engineering |
| Abstract: | In this study, we develop new organic benzothiazolium crystals possessing very large off-diagonal optical nonlinearity. In these crystals, benzothiazolium-based 2-(4-(4-(hydroxymethyl)piperidin-1-yl)styryl)-3-methyl-benzothiazol-3-ium (PMB) cations with large molecular optical nonlinearity are incorporated with two anions: 4 (trifluoromethoxy)benzenesulfonate (TFO) with an orthogonal non-planar shape and 5-bromothiophene-2-sulfonate (BTS) with a planar shape. Both PMB-TFO and PMB-BTS crystals exhibit state-of-the-art off-diagonal effective hyperpolarizability that results from the V-shape and X-shape alignments of PMB chromophores, respectively. Newly developed PMB crystals indicate excellent characteristics for second-order nonlinear optical applications such as difference-frequency generation (e.g. optical rectification) and sum-frequency generation (e.g. second-harmonic generation), which are comparable to current benchmark organic crystals. |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/24344 |
| 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) |
| Published as part of the ZHAW project: | Molecular Phonon-Mode Engineering for All-Organic Gap-Free THz Photonics |
| Appears in collections: | Publikationen School of Engineering |
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