Low temperature and strong magnetic field Raman microscope cryoRaman
CryoRaman was jointly developed by Germany's attocube company and Germany's WITec company. This microscope integrates atocube's low-temperature thermostat and nanolocator technology, as well as the high sensitivity and modular design of the WITec series of microscopes.
This system integrates high-resolution confocal microscopy and ultra sensitive optical elements for micro Raman spectroscopy at low temperatures and strong magnetic fields. CryoRaman is a highly user-friendly turnkey system equipped with a laser source (available at wavelengths of 532nm, 633nm, and 785nm, others available upon request), an ultra-high throughput spectrometer, including Peltier cooled CCD (FI, DD, and EMCCD, as required), and a Raman controller/software package.
The instrument uses a set of xyz locators to roughly locate the sample within a few millimeters, and uses a piezoelectric scanner, which has a large scanning range even at low temperatures. Raman images are obtained by scanning the sample relative to the laser focus and measuring the spectral distribution of Raman signals for each pixel. This time, Raman imaging is performed at low temperatures in a high magnetic field, and spatial, spectral, and depth resolutions are easily obtained.
The research on high-temperature superconductors and other new materials (such as graphene) has led to a significant demand for Raman microscopy at low temperatures and high magnetic fields. CryoRaman perfectly meets these needs and allows users to record Raman images and spectra over a wide temperature range (1.8-300 K) and a magnetic field of up to 15 T. In materials with strong electron phonon coupling, such as graphene, low-temperature Raman spectroscopy is a very effective tool for studying the mechanical and electronic properties of samples. A complex software allows for analysis, sorting, averaging, and post-processing of spectra, enabling users to investigate fine details and fingerprints in Raman features.
main features
Spectral imaging with resolution and speed
→ Automatically obtain Raman spectra for each pixel point
→ Low vibration closed-loop low-temperature thermostat
→ Temperature variation under high magnetic field
→ Temperature range: 1.8K-300K
Magnetic field strength: 9T, 12T, 9T-3T, 9T-1T-1T, 5T-2T-2T
Wide application range: low-temperature Raman and fluorescence spectroscopy
Upgrade features include: low wavenumber and polarization measurement.
main parameter
Instrument type
Low temperature and strong magnetic field confocal Raman microscope
compatibility
Top injection low-temperature thermostat, or integrated into optical platform
objective lens
High numerical aperture low-temperature objective, LT-APO/532 Raman, LT-APO/633 Raman, LT-APO/NIR, other objective options available
Main features
Low wavenumber Raman measurement: detecting Raman signals below 10 wavenumbers; Polarization measurement and other upgrades
Working mode
Imaging mode
Single point measurement or Raman, fluorescence and photoluminescence imaging
Optional upgrade
Polarization control and analysis
resolving power
spatial resolution
Better than 400 nanometers (532nm excitation luminescence)
Vertical resolution
Better than 2 microns (532nm excitation)
detect
spectrograph
Mirror free high-throughput spectrometer with a focal length of 300mm; Other options
filter
<90cm-1 (RayLine Coupler),<10cm-1 (RayShield Coupler) Raman cut off (optional)
grating
532nm excitation light: 600/mm and 1800/mm (BLZ 500nm), automated three grating turntable; Other options
spectral resolution
Better than 1 cm-1/pixel (1800/mm grating)
CCD camera
High sensitivity backlit CCD detector, cooled at room temperature of 20 ° C -60 ° C, with 1024x127 pixels, 90% quantum efficiency of 532nm, and 100kHz readout; FI, DD, EMCCD, etc. are optional
Field of view
Greater than 40 microns
Sample positioning
Travel range
5 x 5 x 4.8mm3
Scanning range
50 x 50 um2@300K , 30 x 30 um2@4K ,
Sample tray
ASH/QE/8/CFM or ASH/QE/4CX
work environment
temperature range
4K 320K (attoDRY800 with LT APO shy); 1.8K 300K (attoDRY2100)
Magnetic field range
Large 12T (depending on magnet)
Excitation luminescence
Excitation wavelength
532nm, 633nm, 785nm, other options available
Scanning controllers and software
Scanning control
Control of low-temperature scanner, spectrometer, and fully automated controls based on WITec USB 3.0 FPGA (if selected)
software
Analysis of Powerful WITec Video and Data Acquisition Software Package
Other optional upgrades
automation
TruePower (calibration of laser power), automatic shutter, automatic switching between white light and Raman, automatic calibration
Software upgrade
TrueMatch: used for spectral analysis and establishing spectral databases
CryoRaman: Functional features
1. WITec Raman spectrometer
The WITec Raman spectrometer is an ultra-high throughput spectrometer (UHTS) developed specifically for high-speed and high-resolution Raman imaging. We provide six models with different focal lengths to adapt to various laser excitation wavelengths (UV to IR) and spectral resolution requirements.
·UHTS has a transmittance of up to 70% and is specifically designed for challenging Raman imaging and low light intensity spectroscopy applications.
·The collection time for each spectrum is less than 1 ms.
·The automatic three grating turntable can accommodate up to three gratings. We offer a variety of gratings to meet individual requirements for spectral range and resolution.
·Multiple types of CCD cameras have excellent quantum efficiency.
2. Polarized light measurement
Polarized light control and analysis:
Polarizers rotate or convert linearly polarized light into circularly polarized light.
The analyzer selects the polarization direction of the emitted beam.
·The independent rotation of the polarizer and analyzer can match the crystal axis of the sample.
Polarizers and analyzers can be manually and electrically configured.
3. Upgrade of ultra-low wavenumber detection
·Allow Raman spectroscopy measurement of ultra-low wavenumber signals less than 10 cm-1
·Provide additional information on Stokes and anti Stokes Raman signals near the Rayleigh line
·Provide dedicated filter banks for various laser wavelengths (488, 532, 633, and 785 nm)
4. WITec software
·The sample localization and scanning are achieved through the novel and intuitive WITec Suite FIVE software controlled atocube locator and scanner.
·The WITec suite five includes a powerful software environment for data collection, evaluation, and processing, including large amounts of data and 3D scanning.
·The integration wizard guides users through the entire experiment, from initial setup and acquisition to data and image post-processing, and simplifies the generation of high-quality images.
·The unique handheld controller EasyLink provides a tactile and real-time interface for guiding automatic translation tables, objective turntables, lighting, and focusing.
·The TrueMatch software (optional upgrade) component can access existing Raman spectroscopy databases and develop new databases.
