力矩介导光磁的直接证据
Direct Evidence of Torque-mediated Optical Magnetism
摘要：
我们报告的实验证据的机制，支持和加强诱导磁化在光学频率没有干预的自旋-轨道或自旋-自旋相互作用。在一系列非磁性分子液体中以中等强度（108 W/cm 2）和短时间尺度（<150 fs）记录的散射光的能量分辨光谱揭示了在分子水平上由光的电场和磁场分量联合驱动的扭矩动力学的特征。虽然过去的实验已经记录了这种类型的磁电相互作用的辐射磁化，但迄今为止还没有证据表明，由于洛伦兹力与光学磁矩的结合作用，交叉偏振光散射光谱中预期的非弹性振动特征。在这里，扭矩被证明占非弹性组件的磁散射谱的条件下，产生没有这样的功能，在电偶极子散射，在极好的协议与量子理论的预测
英文摘要：
We report experimental evidence of a mechanism that supports and intensifies induced magnetization at optical frequencies without the intervention of spin-orbit or spin-spin interactions. Energy-resolved spectra of scattered light, recorded at moderate intensities (108 W/cm2) and short timescales (<150 fs) in a series of non-magnetic molecular liquids, reveal the signature of torque dynamics driven jointly by the electric and magnetic field components of light at the molecular level. While past experiments have recorded radiant magnetization from magneto-electric interactions of this type, no evidence has been provided to date of the inelastic librational features expected in cross-polarized light scattering spectra due to the Lorentz force acting in combination with optical magnetic torque. Here, torque is shown to account for inelastic components in the magnetic scattering spectrum under conditions that produce no such features in electric dipole scattering, in excellent agreement with quantum theoretical predictions
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