Towards scalable entangled photon sources with self-assembled InAs/GaAs quantum dots

Abstract

Biexciton cascade process in self-assembled quantum dots (QDs) provides an ideal system for deterministic entangled photon pair source, which is essential in quantum information science. The entangled photon pairs have recently be realized in experiments after eliminating the FSS of exciton using a number of different methods. However, so far the QDs entangled photon sources are not scalable, because the wavelengths of the QDs are different from dot to dot. Here we propose a wavelength tunable entangled photon emitter on a three dimensional stressor, in which the FSS and exciton energy can be tuned independently, allowing photon entanglement between dissimilar QDs. We confirm these results by using atomistic pseudopotential calculations. This provides a first step towards future realization of scalable entangled photon generators for quantum information applications.

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Cited by in corpus (7)

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• A source of entangled photons based on a cavity-enhanced and strain-tuned GaAs quantum dot
• Electric-field-induced energy tuning of on-demand entangled-photon emission from self-assembled quantum dots
• Theoretical analysis of influence of random alloy fluctuations on the opto-electronic properties of site-controlled (111)-oriented InGaAs/GaAs quantum dots
• Fundamental intrinsic lifetimes in semiconductor self-assembled quantum dots
• Energy-tunable entangled photon sources on a III-V/Silicon chip