Coherence and Optical Emission from Bilayer Exciton Condensates

Abstract

Experiments aimed at demonstrating Bose-Einstein condensation of excitons in two types of experiments with bilayer structures (coupled quantum wells) are reviewed, with an emphasis on the basic effects. Bose-Einstein condensation implies the existence of a macroscopic coherence, also known as off-diagonal long-range order, and proposed tests and past claims for coherence in these excitonic systems are discussed.

14 pages, 4 figures

References in corpus (18)

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Cited by in corpus (26)

• Long-lived direct and indirect interlayer excitons in van der Waals heterostructures
• Light matter interaction in transition metal dichalcogenides and their heterostructures
• Time Reversal Symmetric Topological Exciton Condensate in Bilayer HgTe Quantum Wells
• Effective interaction and condensation of dipolaritons in coupled quantum wells
• Experimental Study of the Exciton Gas Liquid Transition in Coupled Quantum Wells
• Two-dimensional Bose gas of tilted dipoles: roton instability and condensate depletion
• Giant permanent dipole moment of 2D excitons bound to a single stacking fault
• Quantum phase transition of a two-dimensional quadrupolar system
• Roton-maxon spectrum and instability for weakly interacting dipolar excitons in a semiconductor layer
• Excitonic phase transition in the extended three-dimensional Falicov-Kimball model
• Confocal shift interferometry of coherent emission from trapped dipolar excitons
• Optical probing in a bilayer dark-bright condensate system
• Anisotropic superfluidity of two-dimensional excitons in a periodic potential
• Collective electronic excitation in a trapped ensemble of photogenerated dipolar excitons and free holes revealed by inelastic light scattering
• Coherent exciton transport in semiconductors
• Density-wave-type supersolid of two-dimensional tilted dipolar bosons
• Superfluid drag between excitonic polaritons and superconducting electron gas
• Diamagnetism and flux creep in bilayer exciton superfluids
• Overflow of a dipolar exciton trap at high magnetic fields
• Probing phase coherence via density of states for strongly correlated excitons
• Electron-hole pairing of Fermi-arc surface states in a Weyl-semimetal bilayer
• Direct and indirect exciton mixture in double quantum wells
• Excitonic gap formation in neutral bilayer structures
• Density of states and excitonic condensation in the double layer correlated systems
• Collective two-boson decay of excitons in Bose-Einstein condensate and generation of coherent photon-phonon radiation
• Two band model for coherent excitonic condensates