Scientists at Yale have invented a coherent perfect absorber.
Daaammnn!
Interesting.
Puts me in mind of the legendary Fenton Silencer.
It’d be funny if all they did was reverse the polarity on a laser. 
I’ll have to have a look at this. There are already plenty of things with sharp absorptions, and people have been using Fabry-Perot cavities and etalons to reject (if not necessarily to absorb) specific narrow wavelengths for decades. The article doesn’t say exactly what they did, or how.
As someone joked on another forum, “Now we can have sci-fi/Western laser gunfights where they shoot each other’s lasers out of the air!”
Yes, he knew it doesn’t work that way.
So will this shoot out a perfect parallel coherent beam of darkness? That would be just awesome.
Damn. And all I wanted was some sharks with frickin laser beams attached to their heads.
I think coherency is over rated.
Shower curtain!