cryoRaman: Cryogenic Raman Microscope

cryoRaman delivers Raman spectroscopic imaging with unmatched spatial resolutionat very low temperatures. It was developed for researchers studying materials whose novel properties often first emerge when cooled to near absolute zero.

Users can easily access and perform investigations down to 1.8 Kelvinin strong magnetic fields while benefitting from the full performance and versatility of the WITec alpha300 Raman microscope series.

Equippedwithstate-of-the-art cryostat and nanopositioner technologies, abroad range of accessories can also be integrated to optimize the instrument for eachresearcher's unique experimental challenges.

Key Features

1.8 Kelvin to 300 Kelvin operating temperatures

Low-vibration closed-cycle cryostats

Solenoid magnets with a strength of up to 12 Tesla or vector magnets

Excitation wavelengths from VIS to NIR with optimized spectrometers

Full polarization control in excitation and detection

Unique cryogenic-compatible Raman-specific objectives

Exceptionally precise low-temperature nanopositioner

Raman image of tungsten diselenide (WSe₂) recorded at 120 K. 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 2 K. 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 2 K.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 (300 K, 200 K, 50 K, and 2 K) 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