The control of spontaneous emission has attracted much attention for many years. For atoms in free space, atomic coherence and quantum interference are the basic phenomena for controlling spontaneous emission [1– 3]; these have potential applications to lasing without inversion [4–10]. Zhu, Scully, and co-workers have studied the quenching of spontaneous emission using an open V-type atom [11],...

Abstract Intense THz sources are expected for further progresses in nonlinear science and technology. Liquids like water durable continuously-reusable under intense laser irradiation emission though such studies on from targets so far limited. Polarisation fine control of is demonstrated with a tilted micro-thin flow by the two cross-linearly-polarised femtosecond pulses (800nm, 35fs, transform...