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Optical properties of atomically thin transition metal dichalcogenides: Observations and puzzles
M. Koperski, M. R. Molas, A. Arora +4
Recent results on the optical properties of mono- and few-layers of semiconducting transition metal dichalcogenides are reviewed. Experimental observations are presented and discus…
Direct determination of zero-field splitting for single Co ion embedded in a CdTe/ZnTe quantum dot
J. Kobak, A. Bogucki, T. Smoleński +6
When Co impurity is embedded in semiconductor structure, crystal strain strongly influences zero-filed splitting between Co states with spin projection $S_z = \pm 3/2…
Magnetic-field-induced abrupt spin state transition in a quantum dot containing magnetic ions
Maciej Koperski, Tomasz Smoleński, Mateusz Goryca +3
We present the results of a comprehensive magneto-optical characterization of single CdTe quantum dots containing a few Mn2+ ions. We find that some quantum dots exhibit an unexpec…
Tuning the valley and chiral quantum state of Dirac electrons in van der Waals heterostructures
J. R. Wallbank, D. Ghazaryan, A. Misra +15
Chirality is a fundamental property of electrons with the relativistic spectrum found in graphene and topological insulators. It plays a crucial role in relativistic phenomena, suc…
Resonant quenching of Raman scattering due to out-of-plane A/A' modes in few-layer MoTe
K. Gołasa, M. Grzeszczyk, M. R. Molas +6
Temperature-dependent (5 K to 300 K) Raman scattering study of A/A' phonon modes in mono-layer (1L), bilayer (2L), trilayer (3L), and tetralayer (4L) MoTe is reporte…
Radiatively limited dephasing and exciton dynamics in MoSe monolayers
Tomasz Jakubczyk, Valentin Delmonte, Maciej Koperski +5
By implementing four-wave mixing (FWM) micro-spectroscopy we measure coherence and population dynamics of the exciton transitions in monolayers of MoSe. We reveal their dephasi…