I notice that the caption describes a photon seive as containing
"tens of thousands of pinholes." This does not sound like a very
easy device to produce.
Mike Vande Bunt
Richard M. Koolish wrote:
There may be a new kind of zone plate called the 'photon sieve'. Instead of
using clear and opaque concentric rings, it uses pinholes of decreasing diameter
arranged in rings related to the zone plate.
See: http://www-hasylab.desy.de/newsletter/2001-12-01.htm
It was announced in the Nov 8, 2001 issue of the science journal Nature.
