Zobrazeno 1 - 10
of 297
pro vyhledávání: '"Kobak J"'
We report on the optical spectroscopy of the spin of two Co atoms in a quantum dot and interacting with a single exciton. The spectrum of quantum dots containing two Co atoms are exchange interaction and by the strain at the location of the magnetic
Externí odkaz:
http://arxiv.org/abs/2404.09534
Autor:
Szarmach, D., Wiśniewski, K., Kobak, J., Lichocka, K., Jermacz, Ł., Kakareko, T., Sousa, R., Poznańska-Kakareko, M.
Publikováno v:
In Science of the Total Environment 20 October 2024 948
Akademický článek
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Autor:
Ragunathan, G., Kobak, J., Gillard, G., Pacuski, W., Sobczak, K., Borysiuk, J., Skolnick, M. S., Chekhovich, E. A.
Publikováno v:
Phys. Rev. Lett. 122, 096801 (2019)
We achieve direct detection of electron hyperfine shifts in individual CdTe/ZnTe quantum dots. For the previously inaccessible regime of strong magnetic fields $B_z\gtrsim0.1$ T, we demonstrate robust polarization of a few-hundred-particle nuclear sp
Externí odkaz:
http://arxiv.org/abs/1807.07313
Autor:
Kobak, J., Bogucki, A., Smoleński, T., Papaj, M., Koperski, M., Potemski, M., Kossacki, P., Golnik, A., Pacuski, W.
Publikováno v:
Phys. Rev. B 97, 045305 (2018)
When Co$^{2+}$ impurity is embedded in semiconductor structure, crystal strain strongly influences zero-filed splitting between Co$^{2+}$ states with spin projection $S_z = \pm 3/2$ and $S_z = \pm 1/2$. Experimental evidences of this effect have been
Externí odkaz:
http://arxiv.org/abs/1610.05732
Autor:
Bogucki, A., Smoleński, T., Goryca, M., Kazimierczuk, T., Kobak, J., Pacuski, W., Wojnar, P., Kossacki, P.
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 anisotropy using a dark exciton in a moderate in-plane magnetic field. By
Externí odkaz:
http://arxiv.org/abs/1604.02591
Autor:
Kobak, J., Smoleński, T., Goryca, M., Rousset, J. -G., Pacuski, W., Bogucki, A., Oreszczuk, K., Kossacki, P., Nawrocki, M., Golnik, A., Płachta, J., Wojnar, P., Kruse, C., Hommel, D., Potemski, M., Kazimierczuk, T.
Publikováno v:
J. Phys.: Condens. Matter 28, 265302 (2016)
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 large population of individual QDs. The systematic photoluminescence s
Externí odkaz:
http://arxiv.org/abs/1602.06118
Autor:
Smoleński, T., Kazimierczuk, T., Kobak, J., Goryca, M., Golnik, A., Kossacki, P., Pacuski, W.
Publikováno v:
Nature Communications 7, 10484 (2016)
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 of little use for spintronics and solotronics. We show that this well-e
Externí odkaz:
http://arxiv.org/abs/1505.06763
Autor:
Rousset, J. -G., Jakubczyk, T., Kobak, J., Rudniewski, R., Piotrowski, P., Ściesiek, M., Janik, E., Borysiuk, J., Slupinski, T., Golnik, A., Kossacki, P., Nawrocki, M., Pacuski, W.
In this work, we present three groups of microcavities: based on selenium compounds only, based on tellurium compounds only, and structures based on mixed selenium and tellurium compounds. We focus on their possible applications in the field of optoe
Externí odkaz:
http://arxiv.org/abs/1310.4015
Autor:
Kobak, J., Smoleński, T., Goryca, M., Papaj, M., Gietka, K., Bogucki, A., Koperski, M., Rousset, J. -G., Suffczyński, J., Janik, E., Nawrocki, M., Golnik, A., Kossacki, P., Pacuski, W.
Publikováno v:
Nature Communications 5, 3191 (2014)
Solotronics, optoelectronics based on solitary dopants, is an emerging field of research and technology reaching the ultimate limit of miniaturization. It aims at exploiting quantum properties of individual ions or defects embedded in a semiconductor
Externí odkaz:
http://arxiv.org/abs/1308.5142