In this project we develop a novel infrared camera with low noise and high detection efficiency for biomedical applications of optical coherence tomography (OCT) using quantum materials. OCT is a technique used to image the back of the eye and allow for the diagnosis of detrimental eye conditions, for e.g., macular degeneration, diabetic retinopathy and glaucoma. It can also be used for early detection of Alzheimer’s disease. However, current OCT systems are limited by their low sensitivity and spatial resolution. To provide more precise early diagnosis of potentially blinding ocular diseases, we utilize the unique expertise of a collaborative team of researchers to develop an infrared camera with sub-micron resolution and single-photon sensitivity: design and nano fabrication of quantum sensors (Reimer), design and fabrication of CMOS electrical read-out circuits to make the camera (Karim and Levine), and extensive knowledge and research expertise in the area of OCT (Bizheva). At the heart of the infrared camera is a single photon detector recently developed through another TQT-supported project, Next Generation Quantum Sensors. This sensor is based on nanostructured arrays of tapered semiconductor nanowires and is capable to detect light with high efficiency, speed, and timing resolution over an unprecedented wavelength range from the UV to infrared, all while operating at room temperature. This sensor will be integrated into a prototype camera and into existing OCT systems to realize enhanced OCT images of the human retina and cornea in-vivo.
Development of Terahertz Polariton Lasers
Theoretical and experimental results show that the polariton lasing mechanism is a promising basis for a compact, efficient source of terahertz radiation.
July 1, 2017
Implementing High-fidelity Quantum Gates in Multi-level Trapped Ions
Summary The scalability of quantum processors is limited by current error rates for single-qubit gates. By encoding more than a single bit of information within a single ion, multi-level “qudits” offer a promising method of increasing the information density within a quantum processor, and therefore minimizing the number of gates and associated error rates. […]
July 30, 2018
Hybrid Quantum Repeater based on Atomic Quantum Memories and Telecom Wavelength Entangled Photon-Pairs Generated from Semiconductor Nanowires
Summary Losses in physical channels, such as optical fibres, limit existing quantum communication systems to modest distance ranges. Since amplification of quantum signals is fundamentally not possible, we look to extend the range and functionality of these quantum channels by adding quantum memory nodes that can daisy-chain multiple lengths of quantum channels through entanglement […]
October 29, 2018
Topological Properties of Exciton-Polaritons in a Kagome Lattice as a Solid-state Quantum Simulator
Summary In this project, we build a solid-state quantum simulator for engineering a specific Hamiltonian. Quantum simulators are purpose-built devices with little to no need for error correction, thereby making this type of hardware less demanding than universal quantum computers. Our platform consists of exciton-polariton condensates in multiple quantum-wells sandwiched in a semiconductor Bragg […]
December 8, 2018