Instrument Database
FlexPL
General information
- Investigation area
- TechniquesLow temperature photoluminescence
Raman spectroscopy - ManufacturerVarious
- Fabrication yearVarious
- Measured quantityPhotoluminescence and Raman signal giving rise to numerous measured quantities (strain, doping concentration, carrier mobility, native and foreign defects, excitons, band-band transitions, etc.)
- Main applicationMeasuring photoluminescence and Raman spectra down to a temperature of 9 K in a closed-cycle He-cryostat.
- High-throughtput analysisYes
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 (355 nm, 405 nm, 532 nm, 630 nm). Raman spectra can be acquired with a 532 nm and 630 nm laser. The setup is build in a "microscope configuration", allowing for an imaging of most sample surfaces by light microscopy.
- Additional measurement possibilitiesDepending on the outcome of the measurements with the FlexPL system, there is always the possibility to transition towards other spectroscopic equipment of the AG Callsen based on a collaboration.
Contact
- Application scientistDaniel Vaske
Fachbereich 1
IKFP / AG Callsen W4100
Phone number
dvaskeprotect me ?!uni-bremenprotect me ?!.de - Gordon Callsen
Fachbereich 1
IFKP / AG Callsen W4120
Phone number
gcallsenprotect me ?!uni-bremenprotect me ?!.de - Principal investigatorGordon Callsen
Instrument location
- GroupIFKP
- BuildingN3120
- FacultyFachbereich 1