Research

Magnetooptics


Laboratory possess two conventional magnets cooled by liquid helium. Magneto-optical superconducting operating up to 5 T has two pairs of quartz windows enabling measurements in Faraday and Voit configurations. Solenoid magnet operates up to 16 T. In this magnet the fiber optics is used, with a linear polarizer and a quarter-wave plate placed close to the sample in the helium gas. The σ− and σ+ polarizations were switched by reversing the field direction. The experiments can be performed in the temperature range from T=1.8 K up to T=300 K. The magnetooptical laboratory is equipped with optical set-up with high-resolution monochromator and Peltier-cooled charged couple Si device. The photoluminescence and photoluminescence excitation are excited by a set of lasers with very narrow lines: λ=533 nm, 632,8 nm , 780 nm and tunable Ti: Sapphire laser operating in the range of λ=700 nm100 nm.

Representative papers

Thermal dissociation of free and acceptor-bound positive trions from magnetophotoluminescence studies of high quality GaAs/AlxGa1-xAs quantum wells
L. Bryja, J. Jadczak, K. Ryczko, M. Kubisa, J. Misiewicz, A. Wójs, F. Liu, D. R. Yakovlev, M. Bayer, C. A. Nicoll, I. Farrer, D. A. Ritchie
Phys. Rev. B 93, 165303 (2016)
High magnetic field studies of charged exciton localization in GaAs/AlxGa1-xAs quantum wells
J. Jadczak, L. Bryja, K. Ryczko, M. Kubisa, A. Wójs, M. Potemski, F. Liu, D. R. Yakovlev, M. Bayer, C. A. Nicoll, I. Farrer, D. A. Ritchie
Appl. Phys. Lett. 105, 112104 (2014)
Optically induced charge conversion of coexistent free and bound excitonic complexes in two-beam magnetophotoluminescence of two-dimensional quantum structures
J. Jadczak, L. Bryja, A. Wójs, and M. Potemski
Phys. Rev. B 85, 195108 (2012)
High magnetic field spin splitting of excitons in asymmetric GaAs quantum wells
J. Jadczak, M. Kubisa, K. Ryczko, L. Bryja, M. Potemski
Phys. Rev. B 86, 245401 (2012)