Highly pure single photon emission from spectrally uniform surface-curvature directed mesa top single quantum dot ordered array

摘要

Realizing ordered and spectrally uniform single photon source arrays integrable on-chip with light manipulating elements in a scalable architecture lies at the core of building monolithic quantum optical circuits (QOCs). We demonstrate here a spatially ordered 5 x 8 array of surface-curvature driven mesa-top GaAs(001)/InGaAs/GaAs single quantum dots (MTSQDs) that exhibit highly pure (similar to 99%) single photon emission as deduced from the measured g((2))(0) 0.02 at 9.4 K. Polarization-independent and polarization-resolved high resolution photoluminescence measurements show that these ordered and spectrally uniform QDs have neutral exciton emission with an intrinsic linewidth similar to 10 leV and a fine structure splitting 10 mu eV, an important figure of merit for the use of QDs in QOCs. The findings point to the high potential of using such MTSQD based single photon source arrays as a promising platform for on-chip scalable integration with light manipulating units (connected resonant cavity, wave-guide, beam splitter, etc.) to enable constructing QOCs. Published under license by AIP Publishing.