Laboratory for Optical Spectroscopy of Nanostructures contains several setups suitable for performing photoreflectance (PR) and contactless electroreflectance (CER) measurements. They are set on Newport optical tables. The modulation is provided by the air capacitors (CER), or lasers (Ar+, Nd: YAG, He-Ne), with the beam chopped by mechanical choppers (PR). The detection systems consists of monochromators (Jobin-Yvon, Carl Zeiss Jena) with various detectors (photodiodes and photomultipliers) and the signal recorded by the lock-in amplifiers (Stanford Research and EG&G), enabling the measurements in the spectral range from 250 nm up to 5 µm. The control of the experiment temperature is possible due to the application of liquid helium(nitrogen) cryostats (4.2 (77) K up to 300 K) or closed cycle helium coolers (10‑400 K). The PR measurements in the function of the pressure up to 1.8 GPa may be performed using the hydrostatic pressure optical cell. The studies in the magnetic fields up to 5 T are also possible with the Oxford Instruments optical cryostat with superconducting magnet.
