The inelastic light scattering laboratory is devoted to Raman and Brillouin light spectroscopy. The laboratory has three mains setups:
- the high resolution Raman spectroscopy;
- the micro Raman spectroscopy;
- the Brillouin light scattering spect.
High-resolution Raman spectroscopy
The high-resolution Raman setup is based on a Horiba Jobin-Yvon U1000 spectrometer and it is specifically optimized for low-frequency measurements on disordered systems like liquids, glasses, biological materials, etc. Its main components are:
- Oxxius 532 nm DPSS laser;
- Horiba Jobin-Yvon U1000 spectrometer;
- low-noise water-cooled photomultiplier detector.
Measurements can be done in standard conditions or with dedicated sample environment for high and low temperatures (from 4 to 1300 K).
| Laser wavelength | 532 nm |
| Max laser power | 300 mW |
| Gratings | 2 x 1800 lines/mm |
| Resolution | 0.15 cm-1 |
| Detector dark counts | 5 cps |
(Photo credits: SDSClab@UniTN)
Micro-Raman setup
The micro-Raman is an Horiba Jobin-Yvon Aramis integrated confocal system. The spectrometer is equipped with four diffraction gratings and three lasers. The detector is an air-cooled CCD and the system has an xyz-sample stage for mapping.
| Laser wavelength | 532/633/785 nm |
| Max Laser power | 25/8/20 mW |
| Gratings | 300/600/1200/1800 lines/mm |
| Rejection filters | edge filters |
| Detector size | 1024×256 pixels |
Brillouin light scattering setup
The Brillouin light scattering setup allows the study of acoustic excitations in the GHz regime (i.e. below 1 cm-1) in liquids and disordered systems. The core of the setup is the Soprà DMDP2000 double-pass – double-monochromator spectrometer. This instrument is equipped with a couple of two-meter focal length diffraction gratings, operated at the 11th diffraction order. The main components are:
- Spectra Physics Ar Ion laser;
- Soprà double-pass, double-monochromator;
- low-noise water-cooled photomultiplier detector.
Measurements can be done in standard conditions or with dedicated sample environments for high and low temperatures (from 4 to 1300 K).
| Laser wavelength | 514 nm |
| Max laser power | 2000 mW |
| Free spectral range | 2000 cm-1 |
| Resolution | 0.02 cm-1 |
| Detector dark counts | 5 cps |
(Photo credits: SDSClab@UniTN)
