Atomic Layer Precision
Thin films of oxides are deposited with atomic layer precision using pulsed laser deposition. A high-intensity pulsed laser is shooting onto the rotating white target of Al2O3 (alumina). The laser pulse creates a plasma explosion visible as the purple cloud. The plasma cloud expands toward the square substrate, consisting of SrTiO3 , where it deposits thin layers of alumina. This results in a conducting interface between the two materials. The substrate is mounted on a heating plate, glowing red from a temperature of 650ºC, to improve the crystallinity of the alumina thin film.[Bangladesh Wiki Science Competition 2025; CC-BY-4.0]
—Adam Andersen Læssøe, Danmarks Tekniske Universitet, Denmark
