Engineering of selective carrier injection in patterned arrays of single-quantum-dot entangled photon light-emitting diodes

Abstract

Scalability and foundry compatibility (as for example in conventional silicon based integrated computer processors) in developing quantum technologies are exceptional challenges facing current research. Here we introduce a quantum photonic technology potentially enabling large scale fabrication of semiconductor-based, site-controlled, scalable arrays of electrically driven sources of polarization-entangled photons, with the potential to encode quantum information. The design of the sources is based on quantum dots grown in micron-sized pyramidal recesses along the crystallographic direction (111)B theoretically ensuring high symmetry of the quantum dots - the condition for actual bright entangled photon emission. A selective electric injection scheme in these non-planar structures allows obtaining a high density of light-emitting diodes, with some producing entangled photon pairs also violating Bell's inequality. Compatibility with semiconductor fabrication technology, good reproducibility and control of the position make these devices attractive candidates for integrated photonic circuits for quantum information processing.

References in corpus (10)

• Quantum Computing
• Photonic quantum technologies
• Entangled Photon Pairs from Semiconductor Quantum Dots
• Size-dependent fine-structure splitting in self-organized InAs/GaAs quantum dots
• Improved fidelity of triggered entangled photons from single quantum dots
• Observation of strongly entangled photon pairs from a nanowire quantum dot
• Electric-field-induced coherent coupling of the exciton states in a single quantum dot
• Coherence of an Entangled Exciton-Photon State
• Highly entangled photons from hybrid piezoelectric-semiconductor quantum dot devices
• Conditions for entangled photon emission from (111)B site-controlled Pyramidal quantum dots

Cited by in corpus (6)

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• Electrically driven quantum light emission in electromechanically-tuneable photonic crystal cavities
• Statistical study of stacked/coupled site-controlled pyramidal quantum dots and their excitonic properties
• Biexciton Initialization by Two-Photon Excitation in Site-Controlled Quantum Dots: the Complexity of the Antibinding State Case