[13a-PA5-1~9] 13.6 Nanostructures, quantum phenomena, and nano quantum devices

[13a-PA5-6] Observation of ultrahigh purity single-photon characteristics on room-temperature photoluminescence of single colloidal quantum dots

〇Toshiyuki Ihara¹, Shigehito Miki^1,2, Toshiki Yamada¹, Hirotaka Terai¹ (1.NICT, 2.Kobe Univ.)

Keywords:single photon, ultrahigh purity, quantum dot

We recently study experimentally the properties of nonclassical light emitted from colloidal quantum dots (CQDs), soluble high-performance luminescent materials. In this work, we investigated single-photon characteristics on several kinds of CQDs by measuring photon correlation g⁽²⁾ using a temporal filter and superconducting nanowire single-photon detectors. We found that the CQDs with emission wavelength at around 600 nm can generate ultrahigh-purity single photons that exhibit g⁽²⁾(0)~0.005.