Sotome Masato, Ogaki Takuya, Takimiya Kazuo, Ogawa Naoki
Opt Express. 2021 Mar 29;29(7):10048-10058. doi: 10.1364/OE.418312.
We report terahertz electromagnetic wave emission by optical rectification from hydrogen-bonded single molecular crystal 4-nitro-2,5-bis(phenylethynyl)aniline designed to be polar via the hydrogen bonding between nitroaniline cores. The terahertz emission efficiency is comparable to the representative inorganic terahertz emitter ZnTe. We show terahertz emission characteristics, optical spectrum, and theoretical molecular orbital calculations. Another three kinds of nitroaniline-based organic molecules are revealed to form polar crystal structure, and they have large hyperpolarizabilities and have potential for terahertz photonics.
我们报道了通过光学整流从氢键单分子晶体4-硝基-2,5-双（苯乙炔基）苯胺中产生太赫兹电磁波发射，该晶体通过硝基苯胺核之间的氢键设计为极性晶体。太赫兹发射效率与代表性的无机太赫兹发射器碲化锌相当。我们展示了太赫兹发射特性、光谱以及理论分子轨道计算。另外三种基于硝基苯胺的有机分子被揭示形成极性晶体结构，并且它们具有大的超极化率，在太赫兹光子学方面具有潜力。
