Direct excitation of a single quantum dot with cavity-SPDC photons

Uttam Paudel, Jia Jun Wong, Michael Goggin, Paul G. Kwiat, Allan S. Bracker, Michael Yakes, Daniel Gammon, Duncan G. Steel

Research output: Contribution to journalArticlepeer-review


The ability to generate mode-engineered single photons to interface with disparate quantum systems is of importance for building a quantum network. Here we report on the generation of a pulsed, heralded single photon source with a sub-GHz spectral bandwidth that couples to indium arsenide quantum dots centered at 942 nm. The source is built with a type- II PPKTP down-conversion crystal embedded in a semi-confocal optical cavity and pumped with a 76 MHz repetition rate pulsed laser to emit collinear, polarization-correlated photon pairs resonant with a single quantum dot. In order to demonstrate direct coupling, we use the mode-engineered cavity-SPDC single-photon source to resonantly excite an isolated single quantum dot.

Original languageEnglish (US)
Pages (from-to)16308-16319
Number of pages12
JournalOptics Express
Issue number11
StatePublished - 2019

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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