Multi-Dimensional Control in Laterally-Confined Atomically-Thin Nanostructures
Abstract
Title: Multi-Dimensional Control in Laterally-ConfinedAtomically-Thin NanostructuresObjective:The objective of this Young Investigator (YIP) research program is to explore lateral quantum confinement as a new handle for manipulating excitations in two-dimensional (2D) semiconductor nanostructures, thereby enabling deliberate multi-dimensional control of material properties and expanding the possibilities forharnessing the degrees of freedom in low-dimensional materials in electronics applications.Approach:PI will approach this vision with a multifaceted effort to explore the assembly, patterning, and opto-electronic properties of laterally-confined monolayer nanostructures, focusing on controlling quantum size effects and valley pseudo-spin dynamics in length-scale regimes that have been challenging to realize.SOW:Task 1: Understand the influence of lateral confinement, composition, and edges on dynamics in layered transition metal di-chalcogenides (TMDs) and their heterostructures, thereby demonstrating deliberatesize-dependent control of opto-electronic effects in atomically-thin semiconductors.Task 2: Realize monolayer quantum dots (QDs) in the strong confinement regime in which discrete energy levels can be spectrally resolved, but that maintain the symmetry of the delocalized 2D band carriers thereby enabling access to a new quantum valley degree of freedom.Task 3: Leverage the variety of external tools available with 2D TMDs to demonstrate multi-dimensional control of excitations, thereby advancing a new platform for configurable materials with multiple engineered intrinsic quantum properties.Merits and Relevance:Fundamental advances in low-dimensional electronics will continue to define the state-of-the-art for miniaturization of logic, sensor, and communication devices. Configurable and integrateable nano-scale quantum materials will play a critical role in defense applications such as advanced circuit architectures, novel electronics functionality, and quantum logic. Monolayer TMDs can impact the performance of electronic devices by enhancing transistors, photondetectors and sensors, and flexible electronics and thermoelectrics.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 23, 2016
- Source ID
- N000141613055
Entities
People
- Nathaniel Stern
Organizations
- Northwestern University
- Office of Naval Research
- United States Navy