Home – Home – Jornals – Avtometriya 2018 number 2

A system of quantum dots based on Al _x In_{1- x} As/Al _y Ga_{1- y} As solid solutions is investigated. Application of Al _x In_{1- x} As wide-gap solid solutions as the basis of quantum dots substantially expands the spectral range of the radiation to the short-wavelength region, including the wavelength region near ~770 nm, which is of interest for the development of aerospace systems of quantum cryptography. The optical characteristics of Al _x In_{1- x} As single quantum dots grown by the Stranski-Krastanov mechanism were studied by cryogenic microphotoluminescence. The statistics of radiation of the exciton states of single quantum dots was studied using a Hanbury Brown-Twiss interferometer. The function of paired photon correlations clearly shows the sub-Poissonian character of the radiation statistics, which directly confirms the possibility of developing single-photon emitters based on Al _x In_{1- x} As quantum dots. The fine structure of the exciton states of quantum dots was investigated in the wavelength region near ~770 nm. The magnitude of splitting of exciton states is found to be comparable with the natural width of exciton lines, which is of great interest for the development of emitters of pairs of entangled photons based on Al _x In_{1- x} As quantum dots.