Radiative lifetimes of dipolar excitons in double quantum wells

Yotam Mazuz-Harpaz, Kobi Cohen, Boris Laikhtman, Ronen Rapaport, Ken West, Loren N. Pfeiffer

Research output: Contribution to journalArticlepeer-review

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Spatially indirect excitons in semiconducting double quantum wells have been shown to exhibit rich collective many-body behavior that results from the nature of the extended dipole-dipole interactions between particles. For many spectroscopic studies of the emission from a system of such indirect excitons, it is crucial to separate the single-particle properties of the excitons from the many-body effects arising from their mutual interactions. In particular, knowledge of the relation between the emission energy of indirect excitons and their radiative lifetime could be highly beneficial for control, manipulation, and analysis of such systems. Here we study a simple analytic approximate relation between the radiative lifetime of indirect excitons and their emission energy. We show, both numerically and experimentally, the validity and the limits of this approximate relation. This relation between the emission energy and the lifetime of indirect excitons can be used to tune and determine their lifetime and their resulting dynamics without the need of directly measuring it, and as a tool for design of indirect exciton based devices.

Original languageAmerican English
Article number155302
JournalPhysical Review B
Issue number15
StatePublished - 4 Apr 2017

Bibliographical note

Funding Information:
We would like to thank Masha Vladimirova for fruitful discussions. We would also like to acknowledge financial support from the German Deutsche Forschungsgemeinschaft (Grant No. SA-598/9), from the German Israeli Foundation (Grant No. GIF I-1277-303.10/2014), and from the Israeli Science Foundation (Grant No. 1319/12). The work at Princeton University was funded by the Gordon and Betty Moore Foundation through the Emergent Phenomena in Quantum Systems initiative Grant No. GBMF4420, and by the National Science Foundation Materials Research Science and Engineering Center Grant No. DMR-1420541.

Publisher Copyright:
© 2017 American Physical Society.


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