5 ms·
some actual detail.. Photonic crystal https://en.m.wikipedia.org/wiki/Photonic_crystal https://en.m.wikipedia.org/wiki/Photonic_crystal
by basicplus2 5y ago
some actual detail..
Photonic crystal
https://en.m.wikipedia.org/wiki/Photonic_crystal https://en.m.wikipedia.org/wiki/Photonic_crystal