Carnio B N, Zawilski K T, Schunemann P G, Elezzabi A Y
Opt Lett. 2020 Sep 1;45(17):4722-4725. doi: 10.1364/OL.399895.
We report on narrowband terahertz (THz) radiation generation via optical rectification from a crystal. The dense phonon mode distribution of the crystal causes narrow transmission bands in the THz frequency range with enhanced nonlinear susceptibility magnitudes, thus permitting strong narrowband THz radiation generation at the frequencies of 1.97 and 2.34 THz. In comparison to THz radiation generated from a ZnTe crystal, the narrowband THz radiation produced by the crystal is 4.5 times higher at 1.97 THz and 63% higher at 2.34 THz, thus making a viable crystal for use in such areas as security and medicine.
我们报道了通过从一种晶体进行光整流产生窄带太赫兹（THz）辐射的情况。该晶体密集的声子模式分布在太赫兹频率范围内导致了窄传输带，并具有增强的非线性磁化率幅度，从而允许在1.97太赫兹和2.34太赫兹频率下产生强烈的窄带太赫兹辐射。与从碲化锌晶体产生的太赫兹辐射相比，该晶体产生的窄带太赫兹辐射在1.97太赫兹时高出4.5倍，在2.34太赫兹时高出63%，因此使该晶体成为在安全和医学等领域应用的可行晶体。
