Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session M27: Superconductivity:JJ-II
8:00 AM–11:00 AM,
Wednesday, March 8, 2023
Room: Room 219
Sponsoring
Unit:
DCMP
Chair: Timothy Benseman, Queens College, City University of New York
Abstract: M27.00013 : Electrically tuned Josephson effects in exciton-polariton condensates
10:24 AM–10:36 AM
Presenter:
Hua Wang
(University of Oklahoma)
Authors:
Hua Wang
(University of Oklahoma)
Kieran Mullen
(Univ of Oklahoma)
Here we propose an electrically tuned exciton-polariton device in analogy to a superconducting circuit.
The device is formed in a coplanar geometry parallel to the reflectors of the cavity, with lithographically defined regions hosting the 2-D exciton-polaritons serving as the left and right leads of a Josephson Junction.
The dynamics of this interacting bosonic gas give rise to a pair of Josephson-like equations, leading to oscillations in the condensate density and/or the condensate pseudo spin, analogous to Josephson oscillations in a superconducting junction. By applying a spatially varying in-plane electric field, we introduce a chemical potential difference between the left and right leads and focus on the tunneling dynamics. We calculate the characteristic frequency of oscillation and related optical and electrical experimental signatures. Based on this model we discuss the quantum coherent behavior of driven systems and explore their behaviors at higher temperatures.
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