Hi,

I am thinking out loud about how the semiconductor LED evolved into
the laser diode, by exploiting the synchronized population increase
mechanism to generate monochromatic photon emission. Might it be
possible to scale down this electron mechanism to usable radio
frequencies and end up with a radio transmitting antenna that doesn't
require aerials? Might this device then be termed a radio diode?

A*s*i*m*o*v

.... Anyone not wearing 2,000,000 sunblock is gonna have a REAL_ BAD_ DAY_7

Uh, the wavelenght of light aproaches or is about equiv to the diameter of
an atom... a "Radio Emitting Diode" (RED? as opposed to a LED) would be BIG
to emit frequency on the 160 meter band!

Regards,
John

"Scale up" is probably a more descriptive term than "scale down". Do you
know how big it would have to be?

Roy Lewallen, W7EL

Asimov wrote:
Hi,

I am thinking out loud about how the semiconductor LED evolved into
the laser diode, by exploiting the synchronized population increase
mechanism to generate monochromatic photon emission. Might it be
possible to scale down this electron mechanism to usable radio
frequencies and end up with a radio transmitting antenna that doesn't
require aerials? Might this device then be termed a radio diode?

A*s*i*m*o*v

... Anyone not wearing 2,000,000 sunblock is gonna have a REAL_ BAD_ DAY_7

Asimov wrote:

Hi,

I am thinking out loud about how the semiconductor LED evolved into
the laser diode, by exploiting the synchronized population increase
mechanism to generate monochromatic photon emission. Might it be
possible to scale down this electron mechanism to usable radio
frequencies and end up with a radio transmitting antenna that doesn't
require aerials? Might this device then be termed a radio diode?

LEDs don't emit coherent radiation. All your jumbo "RED" would do would
be to emit wideband noise.

--

Peter

They don't? Then hell--I am throwing this laser led away!!!

John

"Peter Hayes" wrote in message
o.uk...
LEDs don't emit coherent radiation. All your jumbo "RED" would do would
be to emit wideband noise.

It's not THAT wide, is it? Anyone know the Q of an LED? I'd guess it's at
least 10...

Actually, a "RED" in ultra-high Ghz is NOT a bad idea--I bet that is on
someones design system!
It actually would not surprize me if the military wasn't already planning a
weapon on such a device--and this is why we have not heard about it... of
course--I may have just forgotten my medication and it is those damn
delusions again! grin

Regards,
John

On Thu, 28 Apr 2005 17:52:49 -0700, "John Smith"
wrote:
Actually, a "RED" in ultra-high Ghz is NOT a bad idea--I bet that is on
someones design system!
They used to call it a MASER. If it had been such a good idea, it
would still be a good idea.

Richard:

Don't spoil the fun! sad-face

Warmest regards,
John

John Smith wrote:
"Don`t spoil the fun! sad-face"

According to my online encyclopedia, the Maser is not new. It appeared
in the Soviet Union about 1952 and was quickly adopted in the U.S.A..

Early Masers got stimulated emission in a stream of energized ammonia
molecules at 24 gigahertz.

Nobel prizes in physics were awarded in 1964 for Maser developments.

The last 40 years has seen emphasis shift to Optical Masers (Lasers).
These now have many applications from surgery to chart pointers. They
are also used to cut metal.

Not quite as many varieties as Baskin & Robbins yet, but the game is
new. Lasers come in many colors and power levels. Wavelengths are in
hundreds of nanometers. 193 nm is UV and comes from argon flouride.
10,600 nm is FIR from Carbon Dioxide. This is the metal cutter.

Find the right material and discover how to tune it to the frequency of
your choice. You may have a new HF generator. You may not have obviated
wave guides and antennas appropriate to the frequency.

Best regards, Richard Harrison, KB5WZI