Similarly, cathodoluminescence has been exploited as a probe to map the local density of states of planar dielectric photonic crystals and nanostructured photonic materials.
12.
Instead, by measuring the wavelength dependence for a fixed point or a certain area, the spectral characteristics can be recorded ( cathodoluminescence spectroscopy ).
13.
Sketch of a cathodoluminescence system : The electron beam passes through a small aperture in the parabolic mirror which collects the light and reflects it into the spectrometer.
14.
His extensive studies by thin sections, cathodoluminescence, electron microprobe and scanning-electron images supported an entirely different model in which K-metasomatism of primary plagioclase produced the myrmekite.
15.
Although direct bandgap semiconductors such as GaAs or GaN are most easily examined by these techniques, indirect semiconductors such as silicon also emit weak cathodoluminescence, and can be examined as well.
16.
Cathodoluminescence and EBIC are referred to as " beam-injection " techniques, and are very powerful probes of the optoelectronic behavior of semiconductors, in particular for studying nanoscale features and defects.
17.
For example, scanning electron microscope ( SEM ) and cathodoluminescence ( CL ) detector . ( 2 ) Single grain geochemical techniques, which are used to acquire chemical composition and variations within minerals.
18.
Cathodoluminescence is a materials property, but with various specimen treatments required and other limitations in SEM the properties are obscured or altered or impossible to detect and hence this mode of detection has not become popular in the past.
19.
By scanning the microscope's beam in an X-Y pattern and measuring the light emitted with the beam at each point, a map of the optical activity of the specimen can be obtained ( cathodoluminescence imaging ).
20.
Examples are the Energy-dispersive X-ray spectroscopy ( EDS ) detectors used in elemental analysis and Cathodoluminescence microscope ( CL ) systems that analyse the intensity and spectrum of electron-induced luminescence in ( for example ) geological specimens.
