Cathodoluminescence Explained. Episode 2: Understanding Micro-LED Arrays
Spectroscopic cathodoluminescence (CL) — the analysis of the wavelengths of light emitted from a sample stimulated by (typically) the electron beam of a scanning electron microscope (SEM) — has been used widely to study material quality and compositional variations in compound semiconductors and to study light-matter interactions in nanophotonic applications. Traditionally, CL detectors analyzed only the wavelength distribution of the emitted light however, recent advancements in detector technology enabled the direction (emission angle) and polarization distributions of the emitted light to determined. However, until the recent launch of the Monarc detector, it was not possible to measure more than one distribution at a time making a complete analysis of the emission properties of a sample or device impractical.
This webinar, the second in our series on Cathodoluminescence, we discuss how simultaneous measurement of wavelength and direction can be used to reveal the light extraction and color rendering of a display device (in this case micro-LED array) as a function of viewing angle.
Whether you are new to CL, or think you already know what CL can do for you, join us to have your eyes opened to the CL revolution.
David Stowe Ph.D., Product Manager, Gatan