Check this out.
Harvard is doing what folks have been doing with microwave & millimeter wave antennas but with lightwaves!!
Best Mike
https://www.seas.harvard.edu/news/2018/ ... -one-point
https://www.dpreview.com/news/465712593 ... -know-them
Harvard Flat Lens
Moderators: rjlittlefield, ChrisR, Chris S., Pau