Symposium EL02: Towards Atomically Precise Colloidal Materials for Conventional and Quantum Optoelectronics

Written by Swati Suman

Jennifer Hollingsworth and Eric Bowes, Los Alamos National Laboratory

Precision colloidal synthesis: How far can it take us in realizing advanced quantum light sources?

Core/shell heterostructure of semiconductor quantum dot provides a better way to explore the limits of controlling quantum optical properties. Control over heterostructure at the nanoscale level provides better band structure, which affects the photoluminescence. Introducing a hole trap at the LnP/CdSe QDS interface releases two color excitonic emissions. The different nano-heterostructure systems reveal the opportunity for achieving designed quantum optical properties.

Victor Klimov, Los Alamos National Laboratory

Engineered colloidal quantum dots as universal optical gain media for solution and solid-state lasers and laser diodes

Laser technologies can be enhanced using colloidal quantum dots. The scalability and inexpensive chemical techniques used to synthesize QDs make them more attractive and prominent to work on. Faster Auger recombination can be removed using meticulously engineered hetero-QDs. The researcher has also employed compositional grading of QDs interior to smoothen charge carrier confinement potential, thereby suppressing the strength of individual Auger transition. This engineered QD shows longer optical gain lifetimes while maintaining strong 3D confinement.