alpha300 RS – Correlative Raman and Scanning Near-field Optical Microscopy

• For the user with challenging experimental requirements, the alpha300 RS facilitates confocal Raman imaging in combination with Scanning Near-field Optical Microscopy for optical imaging with resolution beyond the diffraction limit. It combines all features of the alpha300 S and alpha300 R and many AFM operation modes. Furthermore the combined Raman-SNOM microscope is ideally suited for high-resolution Raman imaging techniques such as nearfield-Raman imaging.

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Key Features

• • All features of the alpha300 R (Raman) and the alpha300 S (SNOM) microscope provided in one instrument
  • Excellent combination of high-resolution surface imaging (SNOM) and chemical imaging (Raman)
  • Ideally suited for combined techniques such as near-field Raman imaging
  • Convenient switching between the measurement techniques is realized by a rotation of the objective turret
  • Sample movement between the measurements not necessary

Application Example

Specifications

• Raman General Operation Modes

  • Raman spectral imaging: acquisition of a complete Raman spectra at every image pixel
  • Planar (x-y-direction) and depth scans (z-direction) with manual sample positioning
  • Image stacks: 3D confocal Raman imaging
  • Time series
  • Single point Raman spectrum acquisition
  • Single-point depth profiling
  • Fibre-coupled UHTS spectrometer specifically designed for Raman microsopy and applications with low light intensities
  • Confocal Fluorescence Microscopy
  • Bright Field Microscopy

  SNOM Operation Modes

  • Scanning Near-field Optical Microscopy (SNOM) modes: bottom up and top down mode, collection mode
  • Confocal Microscopy (CM) modes:
    • Transmission
    • Reflection
    • Fluorescence (optional)
    • SNOM-AFM combinations: AFM operation modes of alpha300 A included or optional available
    • Acquisition of force-distance curves and light-distance curves
    • Fixed-bottom illumination
    • Total internal reflection illumination (optional)

  AFM Operation Modes

  • Contact Mode
  • Lateral Force Mode
  • others optional

• Basic Microscope Features

  • Research grade optical microscope with 6x objective turret
  • Video system: video CCD camera
  • High sensitivity b/w video camera to view sample and SNOM/AFM tip in transmission
  • LED white-light source for Köhler illumination of AFM tip and sample
  • Manual sample positioning in x- and y-direction
  • Microscope base with active vibration isolation system
  • Fibre coupling

  Raman Optional/Upgradable Operation modes

  • Additional lasers, several wavelenghts eligible
  • Additional UHTS-spectrometers (UV, VIS, NIR)
  • Automated, motorized sample positioning and measuring with piezo-driven scan stages
  • Automated confocal Raman imaging
  • Automated multi-area and multi-point measurements
  • Ultrafast Raman imaging (1300 spectra per second) optionally available
  • Upgradable for epi-fluorescence applications
  • Adapter for higher samples 
  • TrueSurface for Raman depth profiling
  • Autofocus

  Computer Interface

  • WITec software for instrument and measurement control, data evaluation and processing

Literature

• • 

    WITec alpha300 Brochure

    Open PDF
    (7.9 MB)

  

  Go to literature area

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