Wavelength- and Angle-Resolved
Overview
Wavelength- and angle-resolved cathodoluminescence (WARCL) mode enables spectroscopic analysis of a sample's emission pattern. The data is collected as a 3D data cube (λ, θ, Φ) and can be considered a stack of wavelength-filtered emission patterns or a (wavelength) spectrum recorded in every emission direction.
Data collection
Data collection utilizes an angle-selecting slit to select a portion of the angle space before using an imaging spectrograph to disperse by wavelength. Commonly, for higher spatial and spectral resolutions, the angular range is scanned sequentially to reconstruct the data cube (λ, θ, Φ).
Uses
To understand how light and matter interact down to the nanoscale, it is important to understand the wavelength distribution (color) of light-emitting devices as a function of viewing angle and determine energy-momentum diagrams of photonic samples.
Applications
Unlock the power of cathodoluminescence—explore cutting-edge applications, dive into expert-led webinars, and discover insights through detailed application notes that fuel scientific breakthroughs.
