Magnetic light and forbidden photochemistry: the case of singlet oxygen
Magnetic light and forbidden photochemistry: the case of singlet oxygen
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DOI：
10.1039/c7tc04130f
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发表时间：
2017-12-07
影响因子：
6.4
通讯作者：
Meseguer, Francisco
中科院分区：
文献类型：
--
作者：
Manjavacas, Alejandro;Fenollosa, Roberto;Meseguer, Francisco
自然界中发生的大多数光学过程都是基于众所周知的原子、分子和固体电子能级之间的光学跃迁的选择规则。由于在大多数情况下，光的磁分量的贡献可以忽略不计，所以通常假设偶极电近似。然而，这种传统的理解受到纳米结构材料的挑战，纳米结构材料与光强烈相互作用，并在其周围产生非常大的磁场增强。本文报道了不同金属纳米结构的磁响应及其对分子氧光谱的影响，这是光化学中偶极子禁止光学跃迁的一个典型例子。
Most optical processes occurring in nature are based on the well-known selection rules for optical transitions between electronic levels of atoms, molecules, and solids. Since in most situations the magnetic component of light has a negligible contribution, the dipolar electric approximation is generally assumed. However, this traditional understanding is challenged by nanostructured materials, which interact strongly with light and produce very large enhancements of the magnetic field in their surroundings. Here we report on the magnetic response of different metallic nanostructures and their influence on the spectroscopy of molecular oxygen, a paradigmatic example of dipole-forbidden optical transitions in photochemistry.