46 citations · 402 across the 32 of their papers we have counts for
33 papers
Tunable g-Factors of Hybridized Orbitals in a Quantum Dot Molecule
Michelle Lienhart, Krzysztof Gawarecki, Pavel Daskalov +10
The ability to control the -factors of orbital spin states in optically active quantum dot molecules (QDMs) is a prerequisite for the high-fidelity generation of multi-photonic…
Emission dynamics in zincblende InAsxP1-x quantum dots in InP nanowires: influence of quantum dot size, composition and nanowire geometry
Tomasz Gzyl, Giada Bucci, Krzysztof Gawarecki +10
Hereby, we present an experimental and theoretical investigation of emission dynamics in zincblende InAsxP1-x quantum dots (QDs) embedded in InP nanowires (NWs) grown via vapour-li…
Ultra-slow orbital and spin dynamics in an electrically tunable quantum dot molecule
Christopher Thalacker, Michelle Lienhart, Markus Stöcker +13
Tunnel-coupled optically active quantum dot molecules (QDMs), have the potential to operate as spin-photon-interfaces with coupled spins that interact with two different photon fre…
Resonant and Anti-resonant Exciton-Phonon Coupling in Quantum Dot Molecules
Michelle Lienhart, Krzysztof Gawarecki, Markus Stöcker +12
Optically active quantum dot molecules (QDMs) can host multi-spin quantum states with the potential for the deterministic generation of photonic graph states with tailored entangle…
Material gain and eight-band k.p description for selected perovskites
Krzysztof Gawarecki, Michał Wiśniewski, Maciej Polak +2
In this work, we present a ready-to-use symmetry invariant expansion form of the eight-band k.p Hamiltonian for inorganic and organic metal halide perovskites (CsPbX and MAPbX$…
Controlled Coherent Coupling in a Quantum Dot Molecule Revealed by Ultrafast Four-Wave Mixing Spectroscopy
Daniel Wigger, Johannes Schall, Marielle Deconinck +18
Semiconductor quantum dot molecules are considered as promising candidates for quantum technological applications due to their wide tunability of optical properties and coverage of…
Structural symmetry-breaking to explain radiative Auger transitions in self-assembled quantum dots
Krzysztof Gawarecki, Clemens Spinnler, Liang Zhai +6
The optical spectrum of a quantum dot is typically dominated by the fundamental transition between the lowest-energy configurations. However, the radiative Auger process can result…
Invariant expansion of the 30-band k.p model and its parameters for III-V compounds
Krzysztof Gawarecki, Paweł Scharoch, Michał Wiśniewski +4
In this work we derive a ready-to-use symmetry invariant expansion of the full-zone 30-band k.p Hamiltonian for the Td point group. In order to find respective parameters, the band…
Electron g-factor in nanostructures: continuum media and atomistic approach
Krzysztof Gawarecki, Michał Zieliński
We report studies of -dependent Landé -factor, performed by both continuous media approximation k.p method, and atomistic tight-binding spds approach. We propose…
Phonon-assisted relaxation between triplet and singlet states in a self-assembled double quantum dot
Krzysztof Gawarecki, Paweł Machnikowski
We study theoretically phonon-induced spin dynamics of two electrons confined in a self-assembled double quantum dot. We calculate the transition rates and time evolution of occupa…
Hole spin-flip transitions in a self-assembled quantum dot
Mateusz Krzykowski, Krzysztof Gawarecki, Pawel Machnikowski
In this work, we investigate hole spin-flip transitions in a single self-assembled InGaAs/GaAs quantum dot. We find the hole wave functions using the 8-band model and calculat…
The importance of second order deformation potentials in modeling of InAs/GaAs nanostructures
Krzysztof Gawarecki, Michał Zieliński
Accurate modeling of electronic properties of nanostructures is a challenging theoretical problem. Methods making use of continuous media approximation, such as k.p, sometimes stru…
Interplay between emission wavelength and s-p splitting in MOCVD-grown InGaAs/GaAs quantum dots emitting above 1.3 μm
Paweł Podemski, Anna Musiał, Krzysztof Gawarecki +11
The electronic structure of strain-engineered single InGaAs/GaAs quantum dots emitting in the telecommunication O band is probed experimentally by photoluminescence excitation spec…
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…
Phonon-assisted carrier tunneling in coupled quantum dot systems with hyperfine-induced spin flip
Paweł Karwat, Krzysztof Gawarecki, Paweł Machnikowski
We calculate the rates of phonon-assisted hyperfine spin flips during electron and hole tunneling between quantum dots in a self-assembled quantum dot molecule. We show that the hy…
Hyperfine interaction for holes in quantum dots: k.p model
Paweł Machnikowski, Krzysztof Gawarecki, Łukasz Cywiński
We formulate the multi-band kp theory of hyperfine interactions for semiconductor nanostructures in the envelope function approximation. We apply this theoretical description to th…
Excitonic complexes in MOCVD-grown InGaAs/GaAs quantum dots emitting at telecom wavelengths
Paweł Mrowiński, Anna Musiał, Krzysztof Gawarecki +8
Hereby, we present a comprehensive experimental and theoretical study of the electronic structure and optical properties of excitonic complexes in strain-engineered InGaAs/GaAs qua…
Spin-orbit coupling and spin relaxation of hole states in [001]- and [111]-orientedquantum dots of various geometry
Krzysztof Gawarecki, Mateusz Krzykowski
We study the influence of spin-orbit coupling on the hole states in InAs/GaAs quantum dots grown on [001]- and [111]-oriented substrates belonging to symmetry point groups: C2v, C3…
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…
Spin-orbit coupling and magnetic field dependence of carriers states in a self-assembled quantum dot
Krzysztof Gawarecki
In this work I investigate the influence of spin-orbit coupling on the magnetic field dependence of carrier states in a self-assembled quantum dot. I calculate the hole energy leve…
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…
Accuracy of effective mass equation for a single and double cylindrical quantum dot
A. Mielnik-Pyszczorski, K. Gawarecki, P. Machnikowski
In this contribution we study the accuracy of various forms of electron effective mass equation in reproducing spectral and spin-related features of quantum dot systems. We compare…
Limited accuracy of conduction band effective mass equations for semiconductor quantum dots
Adam Mielnik-Pyszczorski, Krzysztof Gawarecki, Paweł Machnikowski
Effective mass equations are the simplest models of carrier states in a semiconductor structures that reduce the complexity of a solid-state system to Schrödinger- or Pauli-like eq…
Polaron resonances in two vertically stacked quantum dots
Paweł Karwat, Krzysztof Gawarecki, Paweł Machnikowski
In this work, we present a theoretical study of polaron states in a double quantum dot system. We present realistic calculations which combine 8 band \kp model, configuration inter…