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Quantum photonics on a chip: controlling light at the single photon level

Event Date: March 31, 2016
Speaker: Dr. Luca Sapienza
Speaker Affiliation: University of Southampton (United Kingdom)
Time: 10:30am
Location: EE 317
Contact Name: Professor Andy Weiner
Contact Phone: 765-49-45574
Contact Email: amw@purdue.edu
Open To: ACCEPTABLE FOR ECE 694
Priority: No
School or Program: ECE

Abstract

Single solid-state quantum emitters are promising ingredients for quantum information protocols relying on the storage, manipulation, and transmission of the information encoded in single photons through optical cavities and waveguides. Epitaxially grown, self-assembled InAs/GaAs quantum dots are a particularly promising system for applications such as quantum light generation and single-photon level nonlinear optics. I will discuss the progress of quantum dot research and the implementation of such nanostructures to create simultaneously bright and pure, on-demand, single-photon sources. I will present different quantum photonic geometries for controlling light propagation, brightness and spontaneous emission rate, based on circular grating cavities and photonic crystal waveguides. Finally, I will focus on the comparison between highly engineered structures and disordered media, presenting results of on-chip optical sensing in the visible range on a silicon nitride platform.

Biography

Luca Sapienza is a Lecturer (Assistant Professor equivalent) at the Department of Physics and Astronomy of the University of Southampton (United Kingdom), where he is leading the Solid-state Quantum Optics group. He received his Laurea degree (M.Sc. equivalent) from the University of Padua (Italy) and his Ph.D. degree from the University Paris-Diderot (France). His research activities, focused on the area of quantum photonics with solid-state emitters, aim at the understanding of fundamental cavity quantum electrodynamics effects and their implementation in on-chip devices.