论文标题
调整近场介导的光子电子相互作用与光偏振
Tailoring Near-Field-Mediated Photon Electron Interactions with Light Polarization
论文作者
论文摘要
自由电子与光学近场的非弹性相互作用最近引起了操纵和塑造自由电子波袋的关注。了解非弹性横截面对光学近场极化的性质和依赖性对于基本方面和量子敏感测量中新应用的发展都很重要。在这里，我们研究了等离子近场分布的极化和空间曲线对塑造自由电源和控制能量传递机制的空间曲线的影响，还可以调整电子后坐力。我们特别表明，激动人光的极化可以用作控制旋钮，以通过经验丰富的电子后坐力传播加速度和减速路径。我们还证明了通过合并纳米棒的特定排列来增强或阻碍自由电子的横向后坐力来调整局部等离子的形状的可能性。我们的发现开辟了一条通向等离子近场工程的途径，以对慢电子束进行连贯的操纵和控制，以创建电子波袋的所需形状。
Inelastic interaction of free-electrons with optical near fields has recently attracted attention for manipulating and shaping free-electron wavepackets. Understanding the nature and the dependence of the inelastic cross section on the polarization of the optical near-field is important for both fundamental aspects and the development of new applications in quantum-sensitive measurements. Here, we investigate the effect of the polarization and the spatial profile of plasmonic near-field distributions on shaping free-electrons and controlling the energy transfer mechanisms, but also tailoring the electron recoil. We particularly show that polarization of the exciting light can be used as a control knop for disseminating the acceleration and deceleration path ways via the experienced electron recoil. We also demonstrate the possibility of tailoring the shape of the localized plasmons by incorporating specific arrangements of nanorods to enhance or hamper the transversal and longitudinal recoils of free-electrons. Our findings open up a route towards plasmonic near-fields-engineering for the coherent manipulation and control of slow electron beams for creating desired shapes of electron wavepackets.
