Research

Microphotoluminescence


The high-resolution luminescence experiments are performed by using double-configuration of spectrometers FHR1000 HORIBA Scientific equipped with the gratings specified by maximum efficiency around 1300 nm wavelength. A new generation of liquid nitrogen cooled InGaAs NIR linear array detector (Symphony by HORIBA Scientific) is attached to the system output. The maximum spectral resolution of the experimental setup is approx. 20 μeV. A non-resonant excitation is provided by laser diodes of 660, 530, 667 nm wavelengths. The sample is held in cryogenic temperatures of ~5 K using standard microscopy cryostat ST-500 from JANIS or in microstat MO2 from Oxform Instrument which is equipped with a superconducting magnetic coil that generates magnetic field up to 5 Tesla. For the experiments in magnetic field, the sample can be attached both in Faraday and Voigt configuration using two kinds of sample holders. By using XYZ NanoMax piezoelectric stage from Thorlabs for positioning microscope objective with high numerical aperture NA = 0.4, and two axes of ILS motorized linear stages with sub-micron accuracy from Newport, a spatial resolution on the order of single μm and a single nm accuracy of the positioning is achieved. We use advanced optical elements as dichroic mirrors for transferring infrared signal efficiently, linear polarizers and waveplates for detection of polarized components of emission.

Representative papers

Magnetic field control of the neutral and charged exciton fine structure in single quantum dashes emitting at 1.55µm
P. Mrowiński, A. Musiał, A. Maryński, M. Syperek, J. Misiewicz, A. Somers, J. P. Reithmaier, S. Höfling, and G.Sęk
Appl. Phys. Lett. 106, 053114 (2015)
Single photon emission at 1.55m from charged and neutral exciton confined in a single quantum dash
Ł. Dusanowski, M. Syperek, P. Mrowiński, W. Rudno-Rudziński, J. Misiewicz, A. Somers, S. Höfling, M. Kamp, J. P. Reithmaier, G. Sęk
Appl. Phys. Lett. 105, 021909 (2014)
Exciton and biexciton dynamics in single self-assembled InAs/InGaAlAs/InP quantum dash emitting near 1.55 µm
Ł. Dusanowski, M. Syperek, W. Rudno-Rudziński, P. Mrowiński, G. Sęk, J. Misiewicz, A. Somers, J. P. Reithmaier, S. Höfling, A. Forchel
Appl. Phys. Lett. 103, 253113 (2013)