Figure 2: Dependence of spectrally integrated output energy of Kα emission on pump pulse energy. Here, XFEL pumping pulses excite Cu atoms from the ground state to the upper level (single vacancy of ...

A strong electron–hole exchange interaction (EI) in semiconductor nanocrystals (NCs) gives rise to a large (up to tens of meV) splitting between optically active ('bright') and optically passive ...