[HN Gopher] Tunable ultrasound propagation in microscale metamat...
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       Tunable ultrasound propagation in microscale metamaterials
        
       Author : XzetaU8
       Score  : 23 points
       Date   : 2024-11-23 20:44 UTC (3 days ago)
        
 (HTM) web link (news.mit.edu)
 (TXT) w3m dump (news.mit.edu)
        
       | atoav wrote:
       | These kinds of metamaterials will really open the door to many
       | new applications deemed impossible before. I am curious how (or
       | if) manufacturing these materials at scale will be possible tho.
        
         | momoschili wrote:
         | the tool they used is basically a nanoscale version of a 3D
         | printer that uses UV epoxy. Essentially using a laser focused
         | through a high numerical aperture microscope to focus light and
         | cure the epoxy (there's some nonlinear action here but it isn't
         | that important).
         | 
         | The key point here being that it is a serial process where a
         | single spot is rastered over the sample, unlike conventional
         | optical lithography which is an area illuminating parallel
         | process.
        
           | ElevenLathe wrote:
           | Any reason it couldn't be done in bulk like normal
           | lithography?
        
       | klysm wrote:
       | Could this be used for impedance matching networks?
        
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