HOM Interferometry of Photons in Networks of Ordered Quantum Emitters- Mesatop Single Quantum Dot Arrays
Abstract
This proposal seeks funds under the DURIP FY2023 (FOA-AFRL-AFOSR-2022-0001) for the augmentation of equipment needed to fully implement research under current AFOSR grant FA9550-17-1-0353 Addressable surface-curvature driven mesa top single quantum dot based single photon source array integrated on-chip with dielectric light manipulating elements. The requested instrument—a custom-configured cryogen-free cryostat with vertical and horizontal optical access and tight specifications for temperature and vibrational stability--is to enable examining controlled interference, indistinguishability, and entanglement of photons emitted from one, two, or multiple distinct but known single photon sources in a spatially-ordered 2-dimensional array of epitaxial single quantum dots (SQDs). Such quantum optical studies of networks are enabled for the first time owing to our demonstration, with AFOSR support, of a ground-breaking class of novel shape and size-controlled epitaxial single quantum dots formed selectively at the top of ordered nanomesas in arrays that, in the material system GaAs(001)-InAs-GaAs, show unprecedented spectral emission nonuniformity of less than 2nm centered at 1120nm for a 5X8 array distributed over approximately 1500microm2 and single photon emission purity greater than 99.5percent. A major step towards realizing such a platform—already implemented under AFOSR support-- is the overgrowth of a morphology planarizing overlayer for the subsequent lithographic fabrication of co-designed on-chip passive elements that enhance the emission rate (cavity), and direct and manipulate the emitted single photons (nanoantenna and waveguide) on-chip to realize controlled interference (directional ouplers). To enable full characterization of these ground-breaking mesa-top single quantum dots (MTSQDs) and the unique nanophotonic systems they will potentially enable, we request funds for the acquisition of a custom-configured cryogen-free cryostat system that will enable systematic studies of the relevant figures-of-merit for quantum optical circuits. The requested equipment will augment and complement existing facilities and add an invaluable resource for hands-on exploration of cutting-edge ideas by students and postdocs of varied backgrounds in an interdisciplinary team to produce professionals for the most well educated and confident quantum information technical work force for the Nation.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 29, 2024
- Source ID
- FA95502310152
Entities
People
- A. Madhukar
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Southern California