Dynamic manipulation of probe pulse and coherent generation of beating signals based on tunneling-induced inference in triangular quantum dot molecules**Project supported by the National Natural Science Foundation of China (Grant Nos. 11704151 and 11247201), the Twelfth Five-Year Program for Science and Technology of Education Department of Jilin Province, China (Grant No. 20150215), and the Innovation and Entrepreneurship Program of Liaoning

Abstract

We investigate the dynamic propagation of a probe field via the tunneling-induced interference effect in a triple model of quantum dot molecules. By theoretical analysis and numerical simulation, we find that the number of transparency window relate to the energy splitting and the group velocity of probe field can be effectively controlled by the tunneling coupling intensity. In addition, in the process of light storage and retrieval, when the excited states have no energy splitting in the storage stage but opposite values of the energy splitting in the retrieval stage, the beating signals can be generated.