In article number 2006819, Chien-Chih Lai and co-workers report the first demonstration of a diode-pumped ultralow-threshold continuous-wave room-temperature perovskite laser, by coating MAPbI3 nanocrystallites onto high-quality yttrium aluminum garnet (YAG) crystal fiber. The atomically smooth fiber not only serves as perfect microcavity for ultralow-loss optical resonance but also facilitates...

Ceramic samples of cerium-doped yttrium aluminum garnet (YAG:Ce) were successfully synthesized utilizing a high-powered electron flux field with considerable energy level 1.4 MeV and power density 23 kW/cm2. The ceramics formed in remarkable time span just one second from specifically prepared mix yttrium, aluminum, cerium oxides. process radiation-assisted synthesis within radiation fields fun...

T he first reported work on transparent polycrystalline ceramics goes back to the 1950s. For example, some of the literature on materials discussed in this article, magnesium aluminate spinel and aluminum oxynitride spinels, traces back to late 1950s and early 1960s.1–3 The advantages of these materials over current state-of-the-art materials include • Ease of manufacturing; • Superior mechanic...