22 citations · 57 across the 17 of their papers we have counts for
15 papers · 1 filter
Fast universal parametric spin control in an acoustically modulated quantum dot
Mateusz Kuniej, Michał Gawełczyk
Quantum communication, distributed computing, and hybrid architectures rely on nodes enabling coherent control of qubits and coupling to propagating quantum modes. While semiconduc…
Predictive wavelength tailoring of uniform GaSb-based quantum dots for emission at 1.55 um
Markus Peil, Maja Wasiluk, Ziemowit Olinkiewicz +11
A detailed study of emission wavelength tailoring of GaSb-based QDs formed by InGaSb-filling of droplet-etched nanoholes in AlGaSb is presented. The study shows that the emission w…
Crossover from Rabi oscillations to adiabatic population switching in the Faraday optical control of quantum dot spins
Jan M. Kaspari, Zhe Xian Koong, Dorian A. Gangloff +2
Stimulated Raman transitions in Faraday geometry allow for simultaneous single-shot qubit readout and qubit control. It involves driving an unbalanced system via an auxiliary e…
Higher-harmonic acoustic control of laser-dressed quantum-dot states at sub-Rabi frequencies
Mateusz Kuniej, Paweł Machnikowski, Michał Gawełczyk
Acoustic control and coupling of quantum systems via phonons can enable miniaturized on-chip quantum devices. Optically active quantum dots (QDs) are essential for such platforms,…
Coupling Quantum Dots to Elastic Waves in a Phononic Crystal Waveguide
Jakub Rosiński, Michał Gawełczyk, Matthias Weiß +2
We present a comprehensive study of quantum dot (QD) coupling to various phononic modes in a phononic waveguide, combining multiband kp and configuration-interaction (CI) QD state…
Hybrid acousto-optical spin control in quantum dots
Mateusz Kuniej, Paweł Machnikowski, Michał Gawełczyk
Mechanical degrees of freedom very weakly couple to spins in semiconductors. The inefficient coupling between phonons and single electron spins in semiconductor quantum dots (QDs)…
Optical Activity of Group III-V Quantum Dots Directly Embedded in Silicon
M. Gawełczyk, K. Gawarecki
Optically active III-V group semiconductor quantum dots (QDs) are the leading element of the upcoming safe quantum communication. However, the entire electronic and IT infrastructu…
Telecom wavelength single-photon emission from quasi-resonantly excited InGaSb/AlGaSb quantum dots
Teemu Hakkarainen, Joonas Hilska, Arttu Hietalahti +10
Deterministic light sources capable of generating quantum states on-demand at wavelengths compatible with fiber optics and atmospheric transmission windows are essential for practi…
Hybrid acousto-optical swing-up state control in a quantum dot
Mateusz Kuniej, Paweł Machnikowski, Michał Gawełczyk
State transfer between different quantum systems is key for successful quantum technologies. Over long distances, photons are irreplaceable, but on short ranges in miniaturized com…
Determining Strain Components in a Diamond Waveguide from Zero-Field ODMR Spectra of NV Center Ensembles
M. Sahnawaz Alam, Federico Gorrini, Michał Gawełczyk +13
The negatively charged nitrogen-vacancy (NV) center in diamond has shown great potential in nanoscale sensing and quantum information processing due to its rich spin physics.…
Tunneling-related electron spin relaxation in self-assembled quantum-dot molecules
Michał Gawełczyk, Krzysztof Gawarecki
We study theoretically spin relaxation during phonon-assisted tunneling of a single electron in self-assembled InAs/GaAs quantum-dot molecules formed by vertically stacked dots. We…
Dominant role of the shear strain induced admixture in spin-flip processes in self-assembled quantum dots
Adam Mielnik-Pyszczorski, Krzysztof Gawarecki, Michał Gawełczyk +1
We study theoretically the spin-flip relaxation processes for a single electron in a self-assembled InAs/GaAs quantum dot, using an 8-band kp theory in the envelope function approx…
Controllable electron spin dephasing due to phonon state distinguishability in a coupled quantum dot system
Michał Gawełczyk, Mateusz Krzykowski, Krzysztof Gawarecki +1
We predict a spin pure dephasing channel in electron relaxation between states with unequal Zeeman splittings, exemplified by a spin-preserving electron tunneling between quantum d…
Spin dynamics and magneto-optical response in charge-neutral tunnel-coupled quantum dots
Michał Gawełczyk, Paweł Machnikowski
We model the electron and hole spin dynamics in an undoped double quantum dot structure, considering the carrier tunneling between quantum dots. Taking into account also the presen…
Optical initialization of hole spins in p-doped quantum dots: orientation efficiency and loss of coherence
Michał Gawełczyk, Paweł Machnikowski
We study theoretically the recently proposed hole spin initialization scheme for -doped quantum well or dot systems via coupling to trion states with sub-picosecond circularly p…