[time-nuts] Maser on a chip
attila at kinali.ch
Tue Jan 20 02:33:58 EST 2015
On Sun, 18 Jan 2015 22:59:57 +0000
Mark Sims <holrum at hotmail.com> wrote:
> Not much detail there... but there is an article in Science.
This maser is basically a variation of the quantum cascade laser,
using tunable quantum dots instead of hetero structures to define
the electron levels (think "particle in a box" where the box
can be electrically tuned).
>From the text it seems like that this is only a first demonstrator,
that the technology works. They drove the maser externally and measured
its response to it.
They got an output frequency of 7880MHz and a line width of 34kHz.
It is upon moral qualities that a society is ultimately founded. All
the prosperity and technological sophistication in the world is of no
use without that foundation.
-- Miss Matheson, The Diamond Age, Neil Stephenson
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