在光学密介质中,原子间偶极-偶极耦合作用导致原子跃迁频率的移动,利用这种频移,在高密介质中可以控制 飞秒宽带脉冲实现单光子近共振跃迁的选择性激发。 In optical dense media, the dipole-dipole coupling between atoms leads to the movement of the atomic transition frequency. By using this frequency shift, the femtosecond broadband pulse can be controlled to achieve the selective excitation of the single-photon near-resonance transition in high-density media.