cryoRaman - Cryogenic Raman Microscope

cryoRaman, developed jointly by WITec GmbH and attocube systems AG,enables extremely low-temperature measurements using Raman imaging with unsurpassed spatial resolution. It was designed for scientists looking into materials that exhibit novel properties as they are cooledto almost absolute zero.

The performance and versatility of the alpha300 microscope series, along with advanced cryostat and nanopositioner technology, enables researchers to investigatesamples under extreme conditions.

cryoRaman offers a strong standard feature set that can be supplemented by a wide range of accessories for configurations that addressboth established and emerging challenges.

Key Features

Low-vibration closed-cycle cryostats

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

1.8 Kelvin to 300 Kelvin operating temperatures

Full polarization control in excitation and detection

Unique cryogenic-compatible Raman-specific objectives

Excitation wavelengths from VIS to NIR with optimized spectrometers

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