PHOTOLUMINESCENCE MAPPING HYPERSPECTRAL IMAGER
Photon etc’s Photoluminescence Mapping Hyperspectral Imager (PLM-HI) allows the spectral mapping of samples of size from a few hundreds of micrometers to a few centimeters. Optionally, the system may be upgraded with electrodes for electroluminescence measurements.
The article "Formation Dynamics of Hexadecanethiol Self-Assembled Monolayers on (001) GaAs Observed with Photoluminescence and Fourier Transform Infrared Spectroscopies" published in the Journal of Applied Physics, was based on Photon etc's PLM-HI measurements.
How does it work?
With Photon etc’s PLM-HI, the detection is made one wavelength at a time, but simultaneously on the whole sample. For each point of the field, the output is a monochromatic beam at wavelengths determined from the central pixel wavelength and the horizontal distance from that pixel. This creates a gradient of wavelengths across the field-of-view. By taking a series of images, PHySpec, our proprietary software, produces a hyperspectral cube with purely monochromatic images, allowing spectral analysis in each and every pixel of a full resolution image. Different excitation sources (UV-VIS-NIR) can be included: supercontinuum, Xenon lamp, Tunable Laser Source, etc.
PLM-HI is controlled by PHySpec, a user friendly software also controlling the XYZ translation table for sample positioning. It displays two modes of operation: spectral mode and video mode.
Spectral Mode
The acquisition is done when the filtered light coming from the sample is treated by PHySpec. This mode gives access to a set of monochromatic images from the whole sample, allowing identification of its different constituents.
The signal reaches the detector without wavelength selection, allowing a direct visualisation of the sample and a continuous monitoring of the photoluminescence distribution and its fast variations.