Exciton-Coupled Coherent Magnons: Youn Jue (Eunice) Bae, Postdoctoral Researcher, Columbia University

Event time: 
January 12, 2023 - 10:30am to 12:00pm
Location: 
Sterling Chemistry Laboratory (SCL) See map
Event description: 

Location: SCL 160

Join the Yale Chemistry Department for a Physical Chemistry seminar with Youn Jue (Eunice) Bae, postdoctoral researcher from Columbia University.

Abstract:

The information generated by qubits is at helium temperature and localized. Magnons that are coupled to qubits and optical photons can shuttle information created by qubits at a long distance and up to room temperature. Two-dimensional magnetic semiconductors are attractive candidates to serve as this magnon medium because they can hold both tightly-bound excitons with large oscillator strength and potentially long-lived coherent magnons due to the presence of bandgap and spatial confinement. In this talk, I will discuss the nature of magnon-exciton coupling in the two-dimensional van der Waals antiferromagnetic semiconductor CrSBr. Then, I will talk about how the exciton-coupled magnons coherently propagate in time and space. Lastly, I will discuss the implication of strong coupling between magnons (0.1 meV) to excitons (1.3 eV), and relatively long coherent propagation length (7 µm) and time (10 ns) in magnonics, quantum information science, and optoelectronics.

About Eunice Bae:

Eunice is currently a postdoctoral researcher at Columbia University. She got her Ph. D. at Northwestern University and B.S. at the University of California, Berkeley. Her research interests involve magnetic materials, optical spectroscopy, and quantum information science.