Ever want to cancel out a laser beam? Now you can

Anti-lazing Science/AAAS

There are aspects of science that lend the subject its reputation, at least among schoolchildren, for being “boring” (Punnett squares come to mind). Then there are things like lasers that are completely awesome, regardless of whether you’re eight years old or 80. Which is why it’s mind-blowing that in what must be the least fun science lab in all the universe, researchers have developed an anti-laser. That’s right, Yale scientists are undoing perfectly good laser beams.

But the development of a device that can absorb an incoming laser beam entirely does have some decidedly interesting implications, not least in optical computing systems.

The researchers were looking into theories to explain which materials might be used to create lasers, and their theory predicted that it should also be possible to create a medium capable of absorbing incoming light. The device they ended up with turns to lasers tuned to a specific frequency into a silicon optical cavity. The cavity traps the light, forcing it to bounce around until all of its energy is dissipated as heat.

Their demo device can absorb 99.4 percent of incoming light at a specific wavelength, a property that could be used as an optical switch in future computing schemes that use light rather than electrons to carry out operations. Such a computer could potentially turn certain wavelengths of light off without affecting others, allowing for high degree of control within a computing system. It also might be useful in medical applications, like imaging through opaque biological tissues.

[BBC]

14 Comments

I'm thinking laser armor. Just need a cooling system and it'll work great.

let us not forget anti-deathstar shielding

mmm no i doubt thatd work iirc it says it only absorbs a specific wavelength

But .. maybe it could power spacecraft

sorry guys. I don't mean to be a downer. But I already own both laser armor and ANTI-deathSTAR shielding. both have existed for quite some time now. It is called a mirror.
and then some other smart $$$ is going to say. BUT then the laser beam will just bounce off and shoot your buddy in the $$$ or the deathstar beam will just keep traveling until it hits and explodes some other unsuspecting planet. Yes, but with my super advanced future shield... a mirror... I also have a aiming mechanism, so the beam is simply aimed right back at the source. They probably didn't talk about military applications because this makes the most applicable sense in the computer world. but a laser absorbing shield would be cool.

...until the heat of the laser melted the mirror to a point of nonreflectability, and went though it.
the prospect of absorbing lasers is pretty awesome, though. you could put solar plants in orbit, and have them shoot the power down to us in the form of a laser.

Punnett squares? Boring? I'm doing those in biology right now. I find them quite enjoyable to be honest.

I'm surprised that nobody has mentioned the potential for this to be applied to holographic imaging. I mean like Star Trek true 3D imaging.

What about using these "absorbers" of lasers/lights on solar panels. This could possibly greatly enhance the effectiveness of the panels and help take a much needed step efficient clean energy... endless possibilities...

Everyone is missing the most important aspect of this find... we now know that one day a real 'light saber' can be made!

@jim7207 and it can be made within a few years. if you all remember that article about being able to control the speed of light, funded by DARPA, and if you keep in mind that Japanese researches were able to create a hologram prototype (by creating an invisible Plane in midair where the light is reflected) then you combine all three and you have a light saber. using japans research we could control the lenght of the lazer, and with DARPAs light speed control, we could slow it down enough to make it visible to the human eye, and just give it enough power to be able to shop through meat and bones....but you would also need a next gen battery capable of with holding a tremendous amount of energy!!!!!

Why does everyone think ohhh a mirror can stop a laser! Yea...maybe a laser pointer...Inka aren't you the one that posted about the new chemical laser they were testing for the military? If not, the guy said the SAME thing...mirror. Good luck with your mirror defense :-D

@ -my name here-

That sounds like the most constructive application for laser absorption to me! That would solve the energy crisis indefinitely, depending on where solar panel technology is at these days.

just coat everything with old pentium CPU's, and put a few mirrors in front of them, eh?
just wanted to say mirror again.
tungsten mirror, U shaped fiberoptics lol to route the laser back at the source. i understand that if your frikkin laser is eating 2000ft of steel/sec. you're gonna need aLOT of mirrors, in parallel, which will still be destroyed, but will make cool looking laserburnt mirrors to sell on EbaY.
what happens if you shoot a big diamond with such a mirror, atomic dry ice bomb?

I really like @webmasterdan's suggestion.

If this could be produced cheaply at the nanoscale, a crystal could hold tons of these, as the anti-lasers are made from silicon and therefore are clear. Light could from the bottom and/or top could be emited in different areas at different frequencies, Where the laser stops, as 3D "pixel" could take form.



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