All optical control of exciton flow in a colloidal quantum well complex

Exciton-based solid-state devices have the potential to be essential building blocks for modern information technology to slow down the end of Moore's law. Exploiting excitonic devices requires the ability to control the excitonic properties (e.g., exciton flow, exciton recombination rates or exciton energy) in an active medium. However, until now, the demonstrated techniques for excitonic control have either been inherently complex or sacrificed the operation speed, which is self-defeating and impractical for actual implementation. Hence, a scheme with an emphasis on all-optical control, bottom-up fabrication and self-assembly is highly desired for real-world applications.