Publications (28)
Field-Induced Magnetic Monopole Plasma in Artificial Spin Ice
M. Goryca, X. Zhang, J. Li +6
Artificial spin ices (ASIs) are interacting arrays of lithographically-defined nanomagnets in which novel frustrated magnetic phases can be intentionally designed. A key emergent d…
Single spin optical read-out in CdTe/ZnTe quantum dot studied by photon correlation spectroscopy
J. Suffczynski, K. Kowalik, T. Kazimierczuk +6
Spin dynamics of a single electron and an exciton confined in CdTe/ZnTe quantum dot is investigated by polarization-resolved correlation spectroscopy. Spin memory effects extending…
Brightening of dark excitons in a single quantum dot containing a single magnetic ion
M. Goryca, P. Plochocka, T. Kazimierczuk +5
A promising method to investigate dark exciton transitions in quantum dots is presented. The optical recombination of the dark exciton is allowed when the exciton state is coupled…
Enhancement of electron magnetic susceptibility due to many-body interactions in monolayer MoSe
K. Oreszczuk, A. Rodek, M. Goryca +7
Employing the original, all-optical method, we quantify the magnetic susceptibility of a two-dimensional electron gas (2DEG) confined in the MoSe monolayer in the range of low…
Angle-resolved optically detected magnetic resonance as a tool for strain determination in nanostructures
A. Bogucki, M. Goryca, A. Åopion +7
In this paper, we apply the angle-resolved Optically Detected Magnetic Resonance (ODMR) technique to study series of strained (Cd, Mn)Te/(Cd, Mg)Te quantum wells (QWs) produced by…
Valley relaxation of resident electrons and holes in a monolayer semiconductor: Dependence on carrier density and the role of substrate-induced disorder
Jing Li, M. Goryca, K. Yumigeta +3
Using time-resolved optical Kerr rotation, we measure the low temperature valley dynamics of resident electrons and holes in exfoliated WSe monolayers as a systematic function…
Coherent precession of an individual 5/2 spin
M. Goryca, M. Koperski, P. Wojnar +4
We present a direct observation of a coherent spin precession of an individual Mn ion, having both electronic and nuclear spins equal to 5/2, embedded in a CdTe quantum dot…
Anisotropy of in-plane hole g-factor in CdTe/ZnTe quantum dots
A. Bogucki, T. SmoleÅski, M. Goryca +5
Optical studies of a bright exciton provide only limited information about the hole anisotropy in a quantum dot. In this work we present a universal method to study heavy hole anis…
Epitaxial growth and Photoluminescence Excitation spectroscopy of CdSe Quantum Dots in (Zn,Cd)Se barrier
J. Piwowar, W. Pacuski, T. SmoleÅski +6
Design, epitaxial growth, and resonant spectroscopy of CdSe Quantum Dots (QDs) embedded in an innovative (Zn,Cd)Se barrier are presented. The (Zn,Cd)Se barrier enables shifting of…
Colossal magneto-excitonic effects in 2D van der Waals magnetic semiconductor CrSBr
R. Komar, M. Goryca, A. Åopion +12
2D magnetic semiconductors, which intrinsically couple a rich landscape of magnetic orders with tightly bound electron-hole pairs (excitons), present an exciting platform to invest…
Magnetic-Field-Dependent Thermodynamic Properties of Square and Quadrupolar Artificial Spin Ice
M. Goryca, X. Zhang, J. D. Watts +4
Applied magnetic fields are an important tuning parameter for artificial spin ice (ASI) systems, as they can drive phase transitions between different magnetic ground states, or tu…
Optical signatures of spin dependent coupling in semimagnetic quantum dot molecules
Å. KÅopotowski, P. Wojnar, Å. CywiÅski +5
We present photoluminescence studies of CdTe and CdMnTe quantum dots grown in two adjacent layers. We show that when the dots are 8 nm apart, their magnetooptical properties - Zeem…
Efficient injection of spin-polarized excitons and optical spin orientation of a single Mn2+ ion in a CdSe/ZnSe quantum dot
T. SmoleÅski, W. Pacuski, M. Goryca +3
Circularly polarized optical excitation is used to demonstrate the efficient injection of spin-polarized excitons to individual self-assembled CdSe quantum dots in ZnSe barrier. Th…
Nonreciprocal directional dichroism at telecom wavelengths
K. Park, M. O. Yokosuk, M. Goryca +7
Magnetoelectrics with ultra-low symmetry and spin-orbit coupling are well known to display a number of remarkable properties including nonreciprocal directional dichroism. As a pol…
Fine structure of an exciton coupled to a single Fe2+ ion in a CdSe/ZnSe quantum dot
T. SmoleÅski, T. Kazimierczuk, M. Goryca +2
We present a polarization-resolved photoluminescence study of the exchange interaction effects in a prototype system consisting of an individual Fe2+ ion and a single neutral excit…
Ferromagnetic properties of p-(Cd,Mn)Te quantum wells: Interpretation of magneto-optical measurements by Monte Carlo simulations
A. Lipinska, C. Simserides, K. N. Trohidou +4
In order to single out dominant phenomena that account for carrier-controlled magnetism in p-(Cd,Mn)Te quantum wells we have carried out magneto-optical measurements and Monte Carl…
Deconstructing Magnetization Noise: Degeneracies, Phases, and Mobile Fractionalized Excitations in Tetris Artificial Spin Ice
M. Goryca, X. Zhang, J. Ramberger +5
Direct detection of spontaneous spin fluctuations, or "magnetization noise", is emerging as a powerful means of revealing and studying magnetic excitations in both natural and arti…
Introducing single Mn2+ ions into spontaneously coupled quantum dot pairs
M. Koperski, M. Goryca, T. Kazimierczuk +4
We present the photoluminescence excitation study of the self-assembled CdTe/ZnTe quantum dots doped with manganese ions. We demonstrate the identification method of spontaneously…
Detection of thermodynamic "valley noise" in monolayer semiconductors: access to intrinsic valley relaxation timescales
M. Goryca, N. P. Wilson, P. Dey +2
Together with charge and spin degrees of freedom, many new 2D materials also permit information to be encoded in an electron's valley degree of freedom - that is, in particular mom…
Revealing exciton masses and dielectric properties of monolayer semiconductors with high magnetic fields
M. Goryca, J. Li, A. V. Stier +8
In semiconductor physics, many essential optoelectronic material parameters can be experimentally revealed via optical spectroscopy in sufficiently large magnetic fields. For monol…
Tuning valley polarization in a WSe2 monolayer with a tiny magnetic field
T. SmoleÅski, M. Goryca, M. Koperski +5
In monolayers of semiconducting transition metal dichalcogenides, the light helicity ( or ) is locked to the valley degree of freedom, leading to the possibility of opt…
Optical manipulation of a single Mn spin in a CdTe-based quantum dot
M. Goryca, T. Kazimierczuk, M. Nawrocki +5
A system of two coupled CdTe quantum dots, one of them containing a single Mn ion, was studied in continuous wave and modulated photoluminescence, photoluminescence excitation, and…
Comparison of magneto-optical properties of various excitonic complexes in CdTe and CdSe self-assembled quantum dots
J. Kobak, T. SmoleÅski, M. Goryca +13
We present a comparative study of two self-assembled quantum dot (QD) systems based on II-VI compounds: CdTe/ZnTe and CdSe/ZnSe. Using magneto-optical techniques we investigated a…
Designing quantum dots for solotronics
J. Kobak, T. SmoleÅski, M. Goryca +11
Solotronics, optoelectronics based on solitary dopants, is an emerging field of research and technology reaching the ultimate limit of miniaturization. It aims at exploiting quantu…
Optical study of electron-electron exchange interaction in CdTe/ZnTe quantum dots
T. Kazimierczuk, T. SmoleÅski, J. Kobak +7
We present an experimental study of electron-electron exchange interaction in self-assembled CdTe/ZnTe quantum dots based on the photoluminescence measurements. The character and s…
Quantum interference in exciton-Mn spin interactions in a CdTe semiconductor quantum dot
A. Trojnar, M. Korkusinski, E. Kadantsev +6
We show theoretically and experimentally the existence of a new quantum interference(QI) effect between the electron-hole interactions and the scattering by a single Mn impurity. T…
Magnetic Ground State of an Individual Fe2+ Ion in Strained Semiconductor Nanostructure
T. SmoleÅski, T. Kazimierczuk, J. Kobak +4
We investigate spin properties of a Fe2+ dopant, known for having single nondegenerate ground state in bulk host semiconductor. Due to zero magnetic moment such a ground state is o…
Excitation mechanisms of individual CdTe/ZnTe quantum dots studied by photon correlation spectroscopy
J. Suffczynski, T. Kazimierczuk, M. Goryca +9
Systematic measurements of auto- and cross-correlations of photons emitted from individual CdTe/ZnTe quantum dots under pulsed excitation were used to elucidate non-resonant excita…