Pat Laferriere

Nanowire enthusiast. PhD student @uOttawaScience working at @NRC_CNRC

[Pat Laferriere @PatrickLaferri5]

@GuXuemei @PhotonicsMeetup As far as indistinguishably goes, we can grow them identical but it is challenging. Our emitters are clearly distinguishable by wavelength in this work.

[Pat Laferriere @PatrickLaferri5]

We demonstrate the growth of multiple quantum dots within a single nanowire waveguide by a bottom-up selective-area vapour-liquid-solid growth process. Each quantum dot is shown to act as a bright, efficient, independent single photon source.
@PhotonicsMeetup
#POM20ju #POM20LM

[Pat Laferriere @PatrickLaferri5]

@GuXuemei @PhotonicsMeetup Very good questions, thank you. I have never calculated the theoretical limit but it is a topic of further research. Currently our dots are grown spatially separated enough to make sure they are not electronically coupled together.

[Pat Laferriere @PatrickLaferri5]

@MarioKrenn6240 @PhotonicsMeetup Thank you for your interest and great question. This device operates at around 40% efficiency. This is because of the backward emission loss which could be recovered by adding a gold mirror at the bottom of the nanowire.

[Pat Laferriere @PatrickLaferri5]

@obidama @PhotonicsMeetup The peaks shown in the PL spectra are present at low excitation power. The p-shell would only appear around saturation or above.

[Pat Laferriere @PatrickLaferri5]

@obidama @PhotonicsMeetup Thank you for your interest and very good questions. The cladding acts as a waveguide which helps collect the side emission from the quantum dots. The tapered tip increases the mode size of the emissions which guide the mode until it is mainly supported in air. See Claudon 2010.