WAVEGUIDE-COUPLED INTERLAYER EXCITON CONDENSATION LED IN 2D HETEROSTRUCTURES FOR QUANTUM OPTICS
Abstract
Semiconductor heterostructures consisting of atomically thin two-dimensional (2D) semiconductors provide a material platform to construct novel optoelectronic devices for quantum applications. This proposal aims to build electrically tunable quantum heterostructures of transition metal dichalcogenide (TMD) to create interlayer exciton (IE) light-emitting devices (LED). By constructing high-quality van der Waals (vdW) interfaces between atomically thin vdW pn-junction, we will realize IEs with an extremely long lifetime. Employing electrical injection of electrons and holes into this vdW heterostructure, we will controllably create Bose-Einstein condensate (BEC) of IEs. The coherent light emission from the BEC LED will be coupled to SiN waveguide structures, generating a quantum light source, such as two-mode squeezed photon states. We will measure the time correlation and spatial coherence of the BEC LED. We will also probe two-mode squeezed states using balanced homodyne detection. An on-chip TMD BEC LED integration will provide squeezed light source fully incorporated into the low-loss waveguide for continuous-variable (CV)-based quantum key distribution (QKD) and entanglement swapping. The two-mode squeezed states in the BEC LED provide exciting new revenues for fundamental physics and quantum information applications, as well as sensitive detection schemes beyond the standard quantum limit. The electric-driven deterministic squeezed photon sources operating with high generation rates will enhance the secret-key rate of free-space satellite QKD communications. Our project will thus provide an efficient way for extending the range of quantum communication distance with the chip-scale miniaturized devices design compared with optoelectronics based on usual nonlinear bulk components. The chip-scale, on-demand two-mode squeezed photon-pair sources will also enable a portable entanglement quantum light source that can be a building block for entanglement network nodes in a quantum internet. These research projects are a synergetic collaboration between the US PI and Korean PI, who have complementary expertise in sample preparation, device fabrication, integration, and characterization.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Nov 17, 2022
- Source ID
- FA23862114086
Entities
People
- Philip Kim
Organizations
- Air Force Office of Scientific Research
- President and Fellows of Harvard College
- United States Air Force