Speaker
Description
There is currently a great deal of interest in single photon sources specially for use in quantum information processing. Single photons, once produced, can be reliably manipulated and can travel long distances unaffected. Single quantum emitters such as quantum dots are one of the most promising methods for generating single photons on demand. In this work, we study InAsP quantum dots embedded in InP nanowires as a source of single photons which is potentially capable of producing photons in the optical C-band wavelength. To modulate the properties of our device, we generate a surface acoustic wave (SAW) on the device substrate by fabricating interdigitated transducers that causes two effects. First, a strain field is generated by the SAW that dynamically modulates the quantum dot properties. In addition, a piezoelectric field can be produced to manipulate the electrons and holes. As a result, transition energies within the quantum dot can oscillate at the same frequency of the SAW. This periodic tuning of the transition energy can then be used as a method to regulate the output of a device containing a single quantum dot.
