Publications (15)
Laser spectroscopy of individual quantum dots charged with a single hole
B. D. Gerardot, R. J. Barbour, D. Brunner +6
We characterize the positively charged exciton (X1+) in single InGaAs quantum dots using resonant laser spectroscopy. Three samples with different dopant species (Be or C as accept…
Photonic neuromorphic computing using vertical cavity semiconductor lasers
Anas Skalli, Joshua Robertson, Dafydd Owen-Newns +5
Photonic realizations of neural network computing hardware are a promising approach to enable future scalability of neuromorphic computing. In this review we provide an overview on…
Conceptual design study for heat exhaust management in the ARC fusion pilot plant
A. Q. Kuang, N. M. Cao, A. J. Creely +13
The ARC pilot plant conceptual design study has been extended beyond its initial scope [B. N. Sorbom et al., FED 100 (2015) 378] to explore options for managing ~525 MW of fusion p…
Optical pumping of quantum dot micropillar lasers
L. Andreoli, X. Porte, T. Heuser +5
Arrays of quantum dot micropillar lasers are an attractive technology platform for various applications in the wider field of nanophotonics. Of particular interest is the potential…
Outlier classification using Autoencoders: application for fluctuation driven flows in fusion plasmas
R. Kube, F. M. Bianchi, D. Brunner +1
Understanding the statistics of fluctuation driven flows in the boundary layer of magnetically confined plasmas is desired to accurately model the lifetime of the vacuum vessel com…
Controlling the Interaction of Electron and Nuclear Spins in a Tunnel-Coupled Quantum Dot
C. Kloeffel, P. A. Dalgarno, B. Urbaszek +5
We present a technique for manipulating the nuclear spins and the emission polarization from a single optically active quantum dot. When the quantum dot is tunnel coupled to a Ferm…
Developing of a photonic hardware platform for brain-inspired computing based on VCSEL arrays
T. Heuser, M. Pflüger, I. Fischer +3
Brain-inspired computing concepts like artificial neural networks have become promising alternatives to classical von Neumann computer architectures. Photonic neural networks targe…
Comparison between mirror Langmuir probe and gas puff imaging measurements of intermittent fluctuations in the Alcator C-Mod scrape-off layer
R. Kube, A. Theodorsen, O. E. Garcia +3
Statistical properties of the scrape-off layer (SOL) plasma fluctuations are studied in ohmically heated plasmas in the Alcator C-Mod tokamak. For the first time, plasma fluctuatio…
Dressed excitonic states and quantum interference in a three-level quantum dot ladder system
B. D. Gerardot, D. Brunner, P. A. Dalgarno +4
We observe dressed states and quantum interference effects in a strongly driven three-level quantum dot ladder system. The effect of a strong coupling field on one dipole transitio…
Computational metrics and parameters of an injection-locked large area semiconductor laser for neural network computing
Anas Skalli, Xavier Porte, Nasibeh Haghighi +3
Artificial neural networks have become a staple computing technique in many fields. Yet, they present fundamental differences with classical computing hardware in the way they proc…
Effects of dynamic-demand-control appliances on the power grid frequency
E. B. Tchawou Tchuisseu, D. Gomila, D. Brunner +1
Power grid frequency control is a demanding task requiring expensive idle power plants to adapt the supply to the fluctuating demand. An alternative approach is controlling the dem…
Kinetic modeling of divertor heat load fluxes in the Alcator C-Mod and DIII-D tokamaks
A. Y. Pankin, T. Rafiq, A. H. Kritz +8
The guiding-center kinetic neoclassical transport code, XGC0, [C.S. Chang et. al, Phys. Plasmas 11, 2649 (2004)] is used to compute the heat fluxes and the heat-load width in the o…
Single electron charging of impurity sites visualized by scanning gate experiments on a quantum point contact
A. Pioda, S. Kicin, D. Brunner +5
A quantum point contact (QPC) patterned on a two-dimensional electron gas is investigated with a scanning gate setup operated at a temperature of 300 mK. The conductance of the poi…
DEGAS 2 model validation study: comparison of measured and modeled helium and deuterium line emission arising from an external gas puff on Alcator C-Mod
S. G. Baek, J. L. Terry, D. P. Stotler +2
The ability to accurately model and predict neutral transport in the boundary plasma is important for tokamak operation. Nevertheless, validation of neutral transport models can be…
Tutorial: Photonic Neural Networks in Delay Systems
D. Brunner, B. Penkovsky, B. A. Marquez +3
Photonic delay systems have revolutionized the hardware implementation of Recurrent Neural Networks and Reservoir Computing in particular. The fundamental principles of Reservoir C…