Phonon-assisted absorption gallium oxide photoconductive semiconductor switch
https://www.eurekalert.org/news-releases/1129338 "efficiency bottlenecks in high-power microwave systems, overcome utilizing phonon-assisted bulk carrier excitation rather than low-efficiency impurity-level absorption... 98.93% voltage conversion efficiency under a 4K volt bias/ near material's theoretical limit, 17.7 MW/ square cm peak output power density maintaining structural stability across wide voltage range... miniaturization of high-power defense and low-altitude drone security systems"