Metasurface Solves Calculus Problems as Analog Computer (phys.org) 41 points by vinchuco 11y ago ↗ HN
[–] fferen 11y ago ↗ Basic idea:- A lens acts as a Fourier transform on an optical signal.- d/dx is multiplication by ik in the frequency domain.- They made a spatial reflection profile r(x) ~ ix using an array of nanobricks of different sizes (optimized with simulation)- Optical signal -> lens -> reflection from metasurface -> lens = spatial derivative.I have the paper if anyone wants it and doesn't have access. [–] Church- 11y ago ↗ I'd like it if you get the chance.
2 comments
[ 1.3 ms ] story [ 26.2 ms ] thread- A lens acts as a Fourier transform on an optical signal.
- d/dx is multiplication by ik in the frequency domain.
- They made a spatial reflection profile r(x) ~ ix using an array of nanobricks of different sizes (optimized with simulation)
- Optical signal -> lens -> reflection from metasurface -> lens = spatial derivative.
I have the paper if anyone wants it and doesn't have access.