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Asymmetrical Recoil of an Atom with an Optical Absorption Coefficient Depending on the Incident Direction
Journal of the Physical Society of Japan ( IF 1.7 ) Pub Date : 2021-01-19 , DOI: 10.7566/jpsj.90.024706
Norio Inui 1
Affiliation  

The recoil of a neutral atom irradiated by counter-propagating light with the same frequency and intensity is studied. The expectation value of the momentum transferred from the light to the atom with spherical symmetry at rest is usually zero because of symmetry. However, if the optical absorption coefficient of the atom depends on the incident light direction due to the magnetoelectric effect, as is the case in materials with nonreciprocal directional dichroism, the momentum transfer between the atom and photons depends on the incident direction. This allows even a standing electromagnetic wave to break the symmetry of the recoil of an atom.

中文翻译:

取决于入射方向的具有光吸收系数的原子的不对称反冲

研究了由相同频率和强度的反向传播光照射的中性原子的后坐力。由于对称性,静止时从光传递到具有球形对称的原子的动量的期望值通常为零。但是,如果原子的光吸收系数由于磁电效应而取决于入射光的方向(如具有不可逆方向二向色性的材料的情况),则原子与光子之间的动量转移取决于入射方向。这甚至允许站立的电磁波破坏原子反冲的对称性。
更新日期:2021-01-19
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