Green Light from Red-Emitting Nanocrystals: Broadband, Low-Threshold Lasing from Colloidal Quantum Shells in Optical Nanocavities.
ACS Nano
; 18(16): 10946-10953, 2024 Apr 23.
Article
en En
| MEDLINE
| ID: mdl-38613507
ABSTRACT
Spherical semiconductor nanoplatelets, known as quantum shells (QSs), have captured significant interest for their strong suppression of Auger recombination, which leads to long multiexciton lifetimes and wide optical gain bandwidth. Yet, the realization of benefits associated with the multiexciton lasing regime using a suitably designed photonic cavity remains elusive. Here, we demonstrate broadly tunable lasing from close-packed films of CdS/CdSe/CdS QSs deposited over nanopillar arrays on Si substrates. Wide spectral tuning of the stimulated emission in QSs with a fixed bandgap value was achieved by engaging single exciton (λX â¼ 634 nm), biexciton (λBX â¼ 627 nm), and multiple exciton (λMX â¼ 615-565 nm) transitions. The ensemble-averaged gain threshold of
Texto completo:
1
Bases de datos:
MEDLINE
Idioma:
En
Revista:
ACS Nano
Año:
2024
Tipo del documento:
Article
País de afiliación:
Estados Unidos