| Name: | Optical setup for temperature- and pressure-dependent photoluminescence measurements |
| Contact person: | dr Grzegorz Staszczak (staszczak@unipress.waw.pl) |
| Laboratory: | NL-15 |
| Location: | al. Prymasa Tysiąclecia 98, Warszawa; laboratorium optyczne, I piętro |
Research capabilities and technical data
The optical setup is designed for photoluminescence (PL) spectroscopy measurements under controlled temperature and pressure conditions, enabling the investigation of the optical properties of semiconductor materials, nanostructures, and other luminescent systems I NUV-Visible spectral range. The system allows the study of temperature- and pressure-induced changes in emission spectra, excitonic transitions, recombination processes, and electronic structure.
Temperature-dependent measurements are performed using an optical, close-cycle cryostat operating in the temperature range of 20-300 K. The cryostat provides precise temperature control and stabilization during optical measurements, allowing detailed analysis of the evolution of photoluminescence spectra with temperature.
The emitted light from the samples is collected in a backscattering geometry, dispersed using a SPEX 500 spectrometer and detected with a HORIBA Syncerity charge-coupled device (CCD) camera with a 26 μm × 26 μm pixel size.
Photoluminescence excitation is provided by two laser sources:
- LASOS diode laser (375 nm, 60 mW)
- LASOS DPSS laser (320 nm, 15 mW)
- SkyLark DPSS laser (320 nm, 50 mW).
The system enables also high-pressure PL measurements using a dedicated diamond anvil cell, allowing experiments under hydrostatic pressures up to 130 kbar in the temperature range of 80-300K. This allows investigation of pressure-induced modifications of electronic states, excitonic effects, and optical transitions in the studied materials.
