1 research outputs found
Single Photon Counting from Individual Nanocrystals in the Infrared
Experimental restrictions imposed on the collection and
detection
of shortwave-infrared photons (SWIR) have impeded single molecule
work on a large class of materials whose optical activity lies in
the SWIR. Here we report the successful observation of room-temperature
single nanocrystal photoluminescence at SWIR wavelengths using a highly
efficient multielement superconducting nanowire single photon detector.
We confirm that the photoluminescence from single lead sulfide nanocrystals
is strongly antibunched, demonstrating the feasibility of performing
sophisticated photon correlation experiments on individual weak SWIR
emitters, and, more broadly, paving the way for sensitive measurements
of spectral observables on infrared quantum systems that are incompatible
with current detection techniques