Dominance of radiative recombination from electron-beam-pumped deep-UV AlGaN multi-quantum-well heterostructures
Abstract
AlGaN-based multiple-quantum-well (MQW) heterostructures were irradiated with a pulsed electron beam. Excitation with a beam energy of 12 keV and a beam current of 4.4 mA produced cathodoluminescense at λ=246 nm with a measured peak output power of >200 mW. The emission is dominated by radiative recombination from the MQW up to the maximum tested excitation power density of 1 MW/cm2, as evidenced by unity slope in a double-logarithmic plot of the light output power vs. excitation power density. Monte Carlo simulations of the depth distribution of deposited energy for different beam energies produced good agreement with the measured peak output power vs. beam energy for an assumed carrier diffusion length of ∼200 nm.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 31, 2016
- Source ID
- 10.1063/1.4967220
Entities
People
- Bernard Vancil
- Farsane Tabataba-vakili
- Mark Teepe
- Martin Feneberg
- Max Batres
- Michael Kneissl
- Noble M. Johnson
- Thomas Wunderer
- Zhihong Yang
Organizations
- Defense Advanced Research Projects Agency
- Ferdinand-Braun-Institut
- PARC
- Technische Universität Berlin
- University of Magdeburg