General information

• Investigation area

  Spectroscopy
• Techniques

  Low temperature photoluminescence
  Raman spectroscopy
  
• Manufacturer

  Various
• Measured quantity

  Photoluminescence and Raman signal giving rise to numerous measured quantities (strain, doping concentration, carrier mobility, native and foreign defects, excitons, band-band transitions, etc.)
• Main application

  Measuring photoluminescence and Raman spectra down to a temperature of 9 K in a He-cryostat or up to 1100 K in a heating stage. Mapping with high spatial resolution is available.
• High-throughtput analysis

  Yes
• Correlated workflow available

  Yes

Instrument specification

• Technical aspects

  The setup has two mapping functions allowing to map the photoluminescence and Raman spectra on a large scale (several centimeters) and a small scale (100 x 100 µm², sub-µm steps). Various microscope objective lenses are available for the second mapping option. Furthermore, the entire setup can be adapted to individual needs, giving rise to the name "FlexPL". A multitude of optics (filters, polarizers, waveplates, etc.) can be added to the beam path to ensure best spectroscopic results. High resolution but also overview photoluminescence spectra can be obtained in a spectral range of 360 - 950 nm (CCD and poit-detector detection). Therefore, various excitation sources are available (e.g., 266 nm). Raman spectra can be acquired with a 561 nm or 660 nm laser. The setup is build in a "microscope configuration", allowing for an imaging of most sample surfaces by light microscopy.

• Correlated workflow
• Additional measurement possibilities

  Depending on the outcome of the measurements with the FlexPL system, there is always the possibility to transition towards other spectroscopic equipment of the RG Callsen based on a collaboration.

Contact

• Application scientist

  Jana Lierath
  Fachbereich 1
  IFP / RG Callsen NW1 W4090
  Phone number
  lierathprotect me ?!uni-bremenprotect me ?!.de
• Gordon Callsen
  Fachbereich 1
  IFP / RG Callsen NW1 W4120
  Phone number
  gcallsenprotect me ?!uni-bremenprotect me ?!.de
• Principal investigator

  Gordon Callsen
  

Instrument location

• Group

  RG Callsen
• Building

  NW1
• Room

  S4101
• Faculty

  Fachbereich 1
• Institute University

  IFP