cryoRaman, developed by WITec GmbH and attocube systems AG, delivers the analytical power of Raman imaging with unmatched spatial resolution at very low temperatures. It was developed for researchers investigating materials that reveal novel properties when cooled to near absolute zero.
By combining the performance and modularity of the alpha300 microscope series with advanced cryostat and nanopositioner technology, experiments down to 1.8 Kelvin (K) in high magnetic fields are made easily accessible.
Designed to meet existing and emerging challenges, cryoRaman offers a robust standard feature set that can be augmented through an extensive range of options.
- Excitation wavelengths from VIS to NIR with optimized spectrometers
- 1.8K - 300K operating temperatures
- Low-vibration closed-cycle cryostats
- Unique cryogenic-compatible Raman-specific objectives
- Exceptionally precise low temperature nanopositioner
- Solenoid magnets with a strength of up to 12 Tesla or vector magnets
- Full polarization control in excitation and detection
Raman image of tungsten diselenide (WSe2) recorded at 120K. Areas with one (green), two (blue) and three (red) layers were clearly identified from their Raman spectra. Image Credit: WITec GmbH
Raman image of a MoS2/WSe2 heterostructure recorded at 2K. The colors represent different layer numbers, compositions and orientations. Image Credit: WITec GmbH
Polarization- and magnetic field-dependent Raman images of single- and multi-layer MoS2 at 2K.
The A’1 /E’ intensity ratio is color coded. The polarizer and analyzer were oriented perpendicular or parallel to each other as indicated. Image Credit: WITec GmbH
Temperature-dependent shift of photoluminescence (PL) spectra for WSe2. The PL images at different temperatures (300K, 200K, 50K and 2K) are color coded according to the PL peak position. The normalized PL spectra for each temperature are color-coded accordingly, with solid and dashed lines representing spectra from the center and the outer edges of the single layer, respectively. Image Credit: WITec GmbH