Bounouar Samir, Strauß Max, Carmele Alexander, Schnauber Peter, Thoma Alexander, Gschrey Manuel, Schulze Jan-Hindrik, Strittmatter André, Rodt Sven, Knorr Andreas, Reitzenstein Stephan
Institut für Festkörperphysik, Technische Universität Berlin, 10623 Berlin, Germany.
Institut für Theoretische Physik, Technische Universität Berlin, 10623 Berlin, Germany.
Phys Rev Lett. 2017 Jun 9;118(23):233601. doi: 10.1103/PhysRevLett.118.233601. Epub 2017 Jun 6.
The two-photon dressing of a "three-level ladder" system, here the ground state, the exciton, and the biexciton of a semiconductor quantum dot, leads to new eigenstates and allows one to manipulate the time ordering of the paired photons without unitary postprocessing. We show that, after spectral postselection of the single dressed states, the time ordering of the cascaded photons can be removed or conserved. Our joint experimental and theoretical study demonstrates the high potential of a "ladder" system to be a versatile source of orthogonally polarized, bunched or antibunched pairs of photons.
“三能级阶梯”系统（这里指半导体量子点的基态、激子和双激子）的双光子修饰产生了新的本征态，并允许人们在无需幺正后处理的情况下操纵配对光子的时间顺序。我们表明，在对单个修饰态进行光谱后选择之后，级联光子的时间顺序可以被消除或保留。我们的实验与理论联合研究证明了“阶梯”系统作为正交偏振、成束或反聚束光子对的通用源的巨大潜力。
