Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Winge, David"'
Publikováno v:
Neuromorph. Comput. Eng. 3 034011 (2023)
Neurons with internal memory have been proposed for biological and bio-inspired neural networks, adding interesting functionality. We propose and model a nanoscale optoelectronic neural node with charge-based time-limited memory and signal evaluation
Externí odkaz:
http://arxiv.org/abs/2305.00741
Autor:
Winge, David O., Limpert, Steven, Linke, Heiner, Borgström, Magnus T., Webb, Barbara, Heinze, Stanley, Mikkelsen, Anders
Publikováno v:
ACS Photonics 2020
Recent developments in photonics include efficient nanoscale optoelectronic components and novel methods for sub-wavelength light manipulation. Here, we explore the potential offered by such devices as a substrate for neuromorphic computing. We propo
Externí odkaz:
http://arxiv.org/abs/2003.01087
We study oscillations in quantum cascade lasers due to traveling electric field domains, which are observed both in simulations and experiments. These oscillations occur in a range of negative differential resistance and we clarify the condition dete
Externí odkaz:
http://arxiv.org/abs/1810.13207
Publikováno v:
Phys. Rev. A 98, 023834 (2018)
Quantum Cascade Lasers (QCLs) are generally designed to avoid negative differential conductivity (NDC) in the vicinity of the operation point in order to prevent instabilities. We demonstrate, that the threshold condition is possible under an inhomog
Externí odkaz:
http://arxiv.org/abs/1806.01828
Publikováno v:
Journal of Applied Physics 120, 114302 (2016)
We present a systematic comparison of the results from our non-equilibrium Green's function formalism with a large number of AlGaAs-GaAs terahertz quantum cascade lasers previously published in the literature. Employing identical material and simulat
Externí odkaz:
http://arxiv.org/abs/1607.02374
Publikováno v:
J. Phys. Conf. Ser. 696 (2016)
In this work we include electron-electron interaction beyond Hartree-Fock level in our non-equilibrium Green's function approach by a crude form of GW through the Single Plasmon Pole Approximation. This is achieved by treating all conduction band ele
Externí odkaz:
http://arxiv.org/abs/1602.03997
Publikováno v:
AIP Advances 6, 045025 (2016)
We analyze theoretically a superlattice structure proposed by A. Andronov et al. [JETP Lett 102, 207 (2015)] to give Terahertz gain for an operation point with positive differential conductivity. Here we confirm the existence of gain and show that an
Externí odkaz:
http://arxiv.org/abs/1601.00915
Publikováno v:
Applied Physics Letters 101, 211113 (2012)
The gain spectrum of a terahertz quantum cascade laser is analysed by a non equilibrium Green's functions approach. Higher harmonics of the response function were retrievable, providing a way to approach nonlinear phenomena in quantum cascade lasers
Externí odkaz:
http://arxiv.org/abs/1210.8324
Akademický článek
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Autor:
Winge, David1 david.winge@teorfys.lu.se, Wacker, Andreas1 Andreas.Wacker@fysik.lu.se
Publikováno v:
Optical & Quantum Electronics. Apr2014, Vol. 46 Issue 4, p533-539. 7p.
