Single photon emission was observed from site-controlled InGaN/GaN quantumdots. The single-photon nature of the emission was verified by the second-ordercorrelation function up to 90 K, the highest temperature to date forsite-controlled quantum dots. Micro-photoluminescence study on individualquantum dots showed linearly polarized single exciton emission with a lifetimeof a few nanoseconds. The dimensions of these quantum dots were well controlledto the precision of state-of-the-art fabrication technologies, as reflected inthe uniformity of their optical properties. The yield of optically activequantum dots was greater than 90%, among which 13%-25% exhibited single photonemission at 10 K.
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