纳米标准与检测重点实验室第217期学术报告

题    目：Highly efficient quantum light sources based on quantum dots in photonic nanostructures

报 告 人：刘进 教授（中山大学）

时    间：2019年7月18日（星期四）上午9:30-10:30

地    点：南楼三层会议室 

邀 请 人：刘新风 研究员 

报告摘要：

Solid-state quantum emitters, especially epitaxial quantum dots (QDs) with large optical oscillator strength, are a promising candidate for future on-chip quantum devices. However, the deterministic creation and eventual scalability of single QD devices greatly suffer from the random nature of the QD positions produced in their self-assembled growth. In this talk, I will present a new high-performance system for nanoscale location of QDs based on photoluminescence imaging[1]. By further utilizing such a system, we’ve achieved deterministic couplings between single QDs and a variety of photonic nanostructures, which enables the realizations of quantum photonic devices with state-of-the-art performances, including ultra-bright single-photon/entangled pair sources[2.3], hybrid quantum photonic circuits[4] and single-photon frequency converters[5]. 
 [1]  J. Liu*, M. Davanco*, L. Sapienza, K. Konthasinghe, J. V. D. M. Cardoso, J. D. Song, A. Badolato and K. Srinivasan*, “Cryogenic photoluminescence imaging system for nanoscale positioning of single quantum emitters”, Rev. Sci. Instrum. 88, 023116 (2017).
[2]. Y. M. He, J. Liu*, S. Maier, M. Emmerling, S. Gerhardt, M. Davanco, K. Srinivasan, C. Schneider  and S. H？fling, “Deterministic implementation of a bright, on-demand single photon source with near-unity indistinguishability via quantum dot imaging”, Optica 4 802 (2017).
[3]. M. Davanco*, J. Liu*, L. Sapienza, C. Z. Zhang, J. V. D. M. Cardoso, V. Verma, R. Mirin, S. W. Nam, L. Liu and K. Srinivasan*, “A heterogeneous III-V/silicon integration platform for on-chip quantum photonic circuits with single quantum dot devices”, Nature Commun. 8 889 (2017).
[4]. J. Liu et al., "A solid-state source of strongly entangled photon pairs with high brightness and indistinguishability", Nature Nano. (2019).
[5]. A, Singh, Q. Li, S. F. Liu, Y, Yu, X. Y. Lu, C. Schneider, S, Hoefling, J. Lawall, V. Verma, R. Mirin, S. W. Nam, J. Liu* a

报告人简介：

Jin Liu is a professor of physics in Sun Yat-Sen University. He obtained his PhD degree in 2012 from Technical University of Denmark under the supervision of Prof. Peter Lodahl and Prof. Jesper Mork. Before moving back to China, he worked with Dr. Kartik Srinivasan at National Institute of Standards and Technology (NIST) to develop integrated quantum photonic circuits. His current research activities cover integrated quantum photonics and nanophotonics by utilizing molecular beam epitaxy, semiconductor nanofabrication and cryogenic optical characterizations.