Publication Date
7-18-2025
Document Type
Article
Publication Title
Physical Review B
Volume
112
Issue
3
DOI
10.1103/2vwk-rkc5
First Page
035305
Last Page
035305
Abstract
Spatially indirect excitons in semiconductor quantum wells are relevant to basic research and device applications because they exhibit enhanced tunability, delocalized wave functions, and potentially longer lifetimes relative to direct excitons. Here we investigate the properties of indirect excitons and their coupling interactions with direct excitons in asymmetric InGaAs double quantum wells using optical multidimensional coherent spectroscopy and photoluminescence excitation spectroscopy. Analyses of the spectra confirm a strong influence of many-body effects and reveal that excited-state zero-quantum coherences between direct and indirect excitons in the quantum wells dephase faster than the much-higher-energy single-quantum coherences between excitonic excited states and ground states. The results also suggest an important energy-dependent role of continuum states in mediating system dynamics, and they indicate that dephasing mechanisms are associated with uncorrelated or anticorrelated energy-level fluctuations.
Funding Number
2003493
Funding Sponsor
National Research Council Canada
Department
Physics and Astronomy
Recommended Citation
Christopher L. Smallwood, Rachel Owen, Matthew W. Day, Takeshi Suzuki, Rohan Singh, Travis M. Autry, Smriti Bhalerao, Fauzia Jabeen, and Steven T. Cundiff. "Indirect Excitons and Many-Body Interactions in InGaAs Double Quantum Wells" Physical Review B (2025): 035305-035305. https://doi.org/10.1103/2vwk-rkc5
Comments
This article originally appeared in Physical Review B, Volume 112, Issue 3, 2025. The article can also be found online at: https://doi.org/10.1103/2vwk-rkc5.