论文标题
批量SRTIO3中的二维时空Terahertz内存3
A two-dimensional space-time terahertz memory in bulk SrTiO3
论文作者
论文摘要
铁电材料提供了前所未有的超快速反应，并且在电磁场的影响下开发新的极化培养基具有极大的兴趣。最近的研究工作表明，光激发和强烈的Terahertz（THZ）脉冲在诱导极顺序和分别揭示了SRTIO3（STO）中隐藏的相变。在这里，我们表明，室温下的Sto晶体表面充当超快传感器，可以通过KERR效应和多PS记录极性THZ强度的多秒切换，并通过偶极子对齐降低降低的空间分辨率来记录极性THZ强度。 STO传感器在STO传感器中实现的对比灵敏度和空间分辨率明显优于基于线性pockels效应的当今近场THZ传感器的对比度和空间分辨率，更重要的是，其在几个picseconds上保持两极分化的能力为建立超快时空记忆的新策略打开了大门。
Ferroelectric materials offer unprecedented ultrafast responses and are of great interest for the development of new polarizable media under the influence of an electromagnetic field. Recent research efforts have demonstrated the role of optical excitation and intense terahertz (THz) pulses in inducing a polar order and revealing a hidden phase transition in SrTiO3 (STO), respectively. Here we show that the surface of STO crystals at room temperature act as ultrafast sensors that enable sub-picosecond switching through the Kerr effect and multi-ps recording of polar THz intensity with spatial resolution below the diffraction limit through dipole alignment relaxation. The contrast sensitivity and spatial resolution achieved by in the STO sensor are significantly superior to those of present-day near-field THz sensors based on the linear Pockels effect, and more importantly, its ability to remain polarized for several picoseconds opens the door to a new strategy for building an ultrafast space-time THz memory.
