Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session U65: Superlattices and Nanostructures III: Optical Phenomena
2:30 PM–5:18 PM,
Thursday, March 5, 2020
Room: Mile High Ballroom 4F
Sponsoring
Unit:
DCMP
Chair: Ibrahim Boulares, US Army Res Dev & Eng Command
Abstract: U65.00002 : Switchable Excitonic Circular Polarization in CdSe/CdMnS Nanoplatelets with Bilayer Core and Magnetically Doped Shell
Abstract 
Presenter:
Arman Najafi
(Department of Physics, State University of New York at Buffalo, Buffalo, New York)
Authors:
Arman Najafi
(Department of Physics, State University of New York at Buffalo, Buffalo, New York)
Steven Tarasek
(Department of Physics, State University of New York at Buffalo, Buffalo, New York)
Savas Delikanli
(Department of Electrical and Electronics Engineering, Department of Physics, UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, Ankara, Turkey)
Peiyao Zhang
(Department of Physics, State University of New York at Buffalo, Buffalo, New York)
Tenzin Norden
(Department of Physics, State University of New York at Buffalo, Buffalo, New York)
Sushant Shendre
(LUMINOUS! Centre of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore)
Manoj Sharma
(LUMINOUS! Centre of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore)
Arinjoy Bhattacharya
(Department of Physics, State University of New York at Buffalo, Buffalo, New York)
Nima Taghipour
(Department of Electrical and Electronics Engineering, Department of Physics, UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, Ankara, Turkey)
James Pientka
(Department of Physics, St. Bonaventure University, St. Bonaventure, New York)
Hilmi Volkan Demir
(LUMINOUS! Centre of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore)
Athos Petrou
(Department of Physics, State University of New York at Buffalo, Buffalo, New York)
Tim Thomay
(Department of Physics, State University of New York at Buffalo, Buffalo, New York)
In the presence of an external magnetic field, pulsed excitation below the shell gap results in near-zero circular polarization at all times. In contrast, pulsed excitation with a photon energy larger than the shell gap results in a rapid (100 ps) build-up of the excitonic circular polarization which subsequently remains constant at a level of up to 40%.
We explore a model that describes these results; we also discuss possible applications.
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