Excitons and polaritons in planar heterostructures in external electric and magnetic fields: A multi-sub-level approach

Wilkes, Joe ORCID: https://orcid.org/0000-0001-6776-9162 and Muljarov, Egor ORCID: https://orcid.org/0000-0002-2878-4148 2017. Excitons and polaritons in planar heterostructures in external electric and magnetic fields: A multi-sub-level approach. Superlattices and Microstructures 108 , pp. 32-41. 10.1016/j.spmi.2017.01.027

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Abstract

Excitons and microcavity polaritons that possess a macroscopic dipole alignment are attractive systems to study. This is due to an enhancement of collective many body effects and an ability to electrostatically control their transport and internal structure. Here, we present an overview of a rigorous calculation of spatially-indirect exciton states in semiconductor coupled quantum wells in externally applied electric and magnetic fields. We also treat dipolaritons that form when such structures are positioned at the antinode of a resonant cavity mode. Our approach is general and can be applied to various planar solid state heterostructures inside optical resonators. It offers a thorough description of the properties of excitons and polaritons that are important for modelling their respective fluids. In particular, we calculate the exciton Bohr radius, binding energy, optical lifetime and magnetic field induced enhancement of the effective mass. We also describe electric and magnetic field control of the exciton and polariton dipole moment and brightness.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Uncontrolled Keywords:	Coupled quantum wells; Microcavity polariton; Indirect exciton; Dipolariton
Publisher:	Elsevier
ISSN:	0749-6036
Funders:	Engineering and Physical Sciences Research Council (EPSRC), RBRF
Date of First Compliant Deposit:	14 February 2017
Date of Acceptance:	16 January 2017
Last Modified:	18 Feb 2024 14:46
URI:	https://orca.cardiff.ac.uk/id/eprint/97607

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