Dr. Chao Zhang, professor of the University of Wollongong, visited ISSP on October 9th. He gave a lecture on "Electromagnetically induced transparency of charge pumping in a triple-quantum-dots structure".
In his talk, Professor Zhang first briefly introduced the physical image of electromagnetically induced transparency in a Λ-type level system (EIT) in quantum optics, and then introduced the electromagnetically induced transparency of charge pumping in a triple-quantum-dots with Λ-type level structure (EIET) which was proposed by his group(APL 102, 162116 (2013), JAP 116, 063702 (2014)).
EIT, induced by quantum coherent/interference behavior in the three level systems, has attracted widespread attention in quantum optics field. Professor Zhang's group found that the electronic quantum coherence/interference behaviors can also be realized in the similar quantum dots (QDs) system with three level structures and the two adjustable electromagnetic fields. The computing results show that, with suitable Rabi frequencies and detuning frequencies, an electron can travel from the left dot to the right dot, while the center dot apparently becomes invisible in both the zero and strong Coulomb blockade regimes. It was suggested recently that scalable quantum computation can be setup using the electrical population transfer in tunneling -coupled quantum wells and in quantum dot systems.
Professor Zhang Chao is the distinguished professor of ISSP and has cooperated for a long time with Research Laboratory for Computational Materials Sciences on simulations of material properties, especially photoelectric response problems on graphene. During his stay in ISSP, he discussed with the young staff and postgraduate adequately, and gave some useful suggestions on conductivity, optical properties and other related research works. This visit will further promote the cooperation of both sides.
Chao Zhang, a tenured professor of the University of Wollongong. He received his doctor's degree from the City University of New York in 1987. He is currently the director of the Australian I physical Society, the expert group member of National Natural Science foundation of the Australia, board member of International Infrared and Terahertz Wave Society. He has done many original works on materials science, condensed matter physics, especially in terahertz (THz) optoelectronics and has got many significantly and important results. He has published more than 200 articles on the international authoritative academic Journals.
