Posted on 02/03/2009 8:37:57 AM PST by Ernest_at_the_Beach
A quartz glass structure that formed after (a) 95 seconds and (b) 300 seconds of laser annealing, where the sample in (b) is a cross-section. Scientists discovered that, under intense light irradiation, molten silicon powder particles can form macroscopic structures up to 7 mm high. Image credit: J. Günster, et al. (c)2009 AIP.
We regard the fact that laser light can directly apply forces to a dielectric liquid on a macroscopic level as a finding of great significance, Günster told PhysOrg.com. Those applied forces are direct, yet dont require any physical contact with the liquid.
In experiments, the researchers used a CO2 laser to melt a pile of pure silicon powder, which has a melting temperature of 1713°C (3115°F). At its highest power output of 12 kW, the laser could melt the silicon powder almost instantaneously. However, the researchers lowered the power output to 9.6 kW to avoid excessive evaporation of the silicon.
(Excerpt) Read more at physorg.com ...
Ich bin ein Raumfahrter.
“Ich bin ein Raumfahrter.”
Best, then, to clear the Raum (apologies for the gratuitous joke at the expense of the German language.).
Not all that new or interesting to those of us in laserdom
It's a mysterious world not known by many of us....but good tutorials would be interesting.
All I know is Heat causes stuff to splatter.
What good is it? are they going to start building IC chips with lasers instead of acid etching?
These guys just do “Findings”....another team decides what to do with it....if anything....LOL!
Next step. Attaching the frikin’ lasers to sharks.
LOL!
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.