Abstract: Recent literature has suggested that the McCumber relation relating laser emission and absorption cross-sections is not valid for erbium:glass. We present a theoretical and experimental ...

Japan will from January attempt to extract rare earth minerals from the ocean floor in the deepest trial of its kind, the ...

Geologists from the University of Hong Kong (HKU) have made a breakthrough in understanding how Earth's early continents ...

Average absorption cross section can be measured in a reverberation chamber with an uncertainty estimated from the number of independent samples of the chamber transfer function taken during the ...