学术报告（12月1日）

主持人：王雪华 教授

欢迎广大师生踊跃参加！

摘要：

Realization of photonic quantum technologies requires triggered sources of indistinguishable single and entangled-photon source. Self-assembled quantum dots (QDs) comprise intriguing quantum systems that are promising for generation of single and entangled photons. Of particular importance is that solid state QDs allows integration with light-emitting diode so as to achieve electrically-driven single- and entangled-photon emission. Here I demonstrate a versatile strain-tunable quantum-LED for generation of ultrafast wavelength-tunable single photons and entangled-photon pairs. The device consists of a p-i-n nanomembrane containing InGaAs QDs integrated onto a piezoelectric crystal featuring giant piezo-electric response and capable of delivering well-defined biaxial or anisotropic strain fields. High speed Triggered single photons and entangled photons can be generated via injection of ultra-short electrical pulses into the diode. By employing strain fields, in addition, I will also demonstrate a novel single-photon source based on tensile stressed GaAs QDs with light-hole ground states.

报告人简介：

Dr. Jiaxiang Zhang received his B.Sc. degree from Changchun University of Science and technology, in 2007 and M.Sc. degree from Peking University in 2010. He obtained PhD from Chemnitz University of Technology, Germany in 2015, where he conducted research works on the development of ultrafast electrically triggered single and entangled-photon sources for photonic quantum applications. Currently, he is working as a senior scientist in Institute for Integrative Nanosciences (IIN) at Leibnitz Institute for Solid State and Material Research. His research activities focus on quantum optics, quantum light sources, and optoelectronic devices based on micro- and nanostructures in III-V semiconductor materials.