ON-CHIP HONG-OU-MANDEL INTERFEROMETRY BASED SCALABLE QUANTUM PHOTONIC INTEGRATED CIRCUITS
Abstract
We propose a bold but realistic program to explore the fabrication and study of on-chip quantum photonic “Rosetta stone”—the basic interferometric unit that underlies quantum information processing aimed at quantum computing, quantum sensing and metrology, and clocking. This proposition is enabled, for the first time, by our ground-breaking demonstration—in large part supported by a current AFOSR grant (FA9550-17-01-0353)—of spatially-ordered arrays of quantum emitters of sufficiently uniform spectral characteristics (nonuniformity <3nm) and high brightness (~100%), single photon purity (>99.5%), and indistinguishability (>80% at 11K) exceeding the thresholds identified for applications in linear optical quantum computing, high capacity high speed secure communication utilizing higher-dimensional multiple beams of single photons, quantum-enhanced imaging up to the Heisenberg limit, the parallel generation of multiple two-photon NOON states suitable for probing dynamical systems, and potentially the generation of large photon number entangled states. These quantum emitters are a unique class of epitaxial semiconductor quantum dots synthesized in ordered arrays dubbed mesa-top single quantum dots (MTSQDs). The primary material system utilized for the demonstrations is GaAs(001)/InGaAs/AlGaAs material combination that covers the SQD emission over ~730nm to 1300nm but the approach is applicable to a variety of material combinations. Specifically, we propose to (i) fabricate arrays of basic emitter units (BEUs) comprising a MTSQD embedded in appropriate cavity and waveguide, (ii) incorporate local-tuning via the Stark effect to enable on-resonance behavior in multiple MTSQD emission, (iii) explore BEUs in monolithic and III-V/Si photonics based basic hybrid units (BHUs), and (iv) examine controlled interference and entanglement between two photons from desired distinct MTSQDs for large number of such pairs. Establishing the basic characteristics of such units across a scalable large array is the long-sought step towards realistic estimation of the prospects of solid-state quantum photonic systems. Efforts involve targeted collaborations with colleagues from AFRL and NIST.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 20, 2023
- Source ID
- FA95502210376
Entities
People
- A. Madhukar
Organizations
- Air Force Office of Scientific Research
- United States Air Force