Year: 2025
Type: preprint
Abstract: Solution-processed nanocrystals are uniquely positioned as versatile, scalable single photon sources (SPSs) for quantum technologies with recent advancements in their synthesis control and nanophotonics integration. Here, we report spectroscopic studies of single colloidal alloyed core-crown (CC) CdSe/CdSexS1-x nanoplatelets (NPLs, 29 nm x 9 nm) in relevance to SPSs. Upon passivation of the CdSe core-NPL edge facets that are largely responsible for non-radiative pathways, CC NPLs demonstrate enhanced optical stability, thus enabling excellent single photon purity as low as g2 (0)=0.03 with an average g2 (0)=0.2 across several particles at ambient conditions. Small peak emission energy fluctuations (5 meV) amongst particles, narrow individual linewidths (48 meV), and preserved fast radiative lifetimes (~ 3 ns) under strong dielectric confinement makes the CC NPLs viable, large-scale quantum emitters for achieving high degree of indistinguishability with future photonic cavity integration.
Source: ChemRxiv
Authors: Mitesh Amin, Liam Burke, Farwa Awan, Todd D. Krauss
Institution: University of Rochester
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4415698368