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We review the recent development of high efficiency single photon sources based on a single quantum dot in a photonic wire. Unlike cavity-based devices, very pure single photon emission and efficiencies exceeding 0.7 photon per pulse are jointly demonstrated under non-resonant pumping conditions. By placing a tip-shaped or trumpet-like tapering at the output end of the wire, a highly directional Gaussian...
Phosphor-free white light-emitting diodes consisting of InGaN/GaN green-yellow quantum dots and blue quantum wells have been grown by metal organic chemical vapor deposition. Their color-rendering index Ra was calculated up to 62.
Time-resolved photoluminescence spectroscopy of InGaAs strained quantum dot prepared by ultrahigh-rate MBE growth indicated a small distribution of ground states energies and carrier lifetime as long as 0.9 ns at 77 K.
We report on an integrated optoelectronic regenerative pulse generator comprising an excitable resonant tunneling diode photo-detector, a laser diode, and an optical fiber in a delayed feedback loop enabling signal buffering and robust addressing.
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