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Quantum light sources based on deterministic microlenses structures with (111) In(Ga)As and AlInAs QDs.
Quantum light sources based on deterministic microlenses structures with (111) In(Ga)As and AlInAs QDs.
Derebezov, I. A.; Haisler, V. A.; Haisler, A. V.; Dmitriev, D. V.; Toropov, A. I.; Rodt, Sven; Helversen, Martin von; Haye, Christoph de la; Bounouar, Samir; Reitzenstein, Stephan
AG Optoelektronik und Quantenbauelemente
The results of the development and implementation of a single photon source based on a bottom semiconductor Bragg reflector, top deterministic GaAs microlens structures and a single (111) In(Ga)As QD are presented. The structure of the microcavity ensures effective pumping of a single (111) In(Ga)As QD and high emission output efficiency, a clear single – photon emission was detected with a second – order correlation function at zero delay g(2)(0) = 0.07. A system of QD’s on the basis of AlXIn1-XAs/AlYGa1-YAs solid solutions has been studied. The usage of broadband AlXIn1-XAs solid solutions as the basis of quantum dots makes it possible to expand considerably the spectral emission range into the short-wave region, including the wavelength region near 770 nm being of interest for the design of aerospace systems of quantum cryptography. The optical characteristics of single AlXIn1-XAs quantum dots grown according to the Stranski–Krastanov mechanism are studied by the cryogenic microphotoluminescence method.
