Refractory laser oxyorthosilicates single crystals are grown under CO2 laser irradiation without use of crucible

In a recent work published in Journal of Materials Chemistry C 8, 2065, 2020!divAbstract we show that a laser material with relatively low thermal conductivity can be grown with laser quality by the Laser Floating Zone growth technique using a CO2 laser as heat source for material melting.

Key steps for this achievement have been the selection of the  (Lu0.3Gd0.7)2SiOcomposition to obtain single phase material upon resolidification and the engineering of the heating/cooling cycles.

The lack of any crucible to hold the material allows the melting of refractory compounds above 1500 ºC in oxidizing atmospheres.  This suposses a great advantage for the devellopment of crystals for mode-locked laser producing ultrashort laser pulses.

This has been possible through the collaboration with the Aveiro University.