The nonlinearity must be attached to the cathode itself because a THz signal will not go through even 1 micron of electrolyte. In the Letts-Cravens-Hagelstein experiment, a tiny amount of gold was added to the cathode to produce the nonlinearity. Did it work because it formed a diode junction? Was the nonlinearity plasmon related? That is presently unknown - but it was produced directly on the cathode, which is the target.
On Thu, Oct 15, 2020 at 1:50 PM Sean Logan <paco66...@gmail.com> wrote: > Sounds fascinating. May I ask: what are you using as your non-linear > element, to cause the two laser beams to heterodyne? Is it the target they > shine on, itself? > > On Wed, Oct 14, 2020, 15:19 Bob Higgins <rj.bob.higg...@gmail.com> wrote: > >> Sean, >> >> What you are describing is entirely possible. Also, diode lasers can be >> driven into modes that produce sidebands just at the threshold of ordinary >> output - but it is hard to control the sidebands without an expensive >> "loop" receiver and some kind of lock-in control. >> >> Using 2 lasers is pretty easy. I am presently working on a dual laser >> experiment with 2 tunable diode lasers combined optically onto a single >> fiber. The wavelength separation (determines the beat frequency) is >> continuously monitored in a high resolution fiber spectrometer. We are >> nearly ready to run experiments with this hardware. >> >> On Wed, Oct 14, 2020 at 2:10 PM Sean Logan <paco66...@gmail.com> wrote: >> >>> Could you use an Optical Parametric Amplifier to create your desired >>> sidebands? Using one laser as the "signal input" and the other as the >>> "pump" should give you an output containing sum and difference frequencies >>> (sidebands, or heterodynes). >>> >>> >>> On Wed, Oct 14, 2020, 12:29 H LV <hveeder...@gmail.com> wrote: >>> >>>> In my estimation Rumford's theory is the seed of an alternate theory of >>>> radiation. It could still grow and blossom into a well >>>> developed mathematical theory of heat. >>>> >>>> I am interested in beat theory because it resonants (pun intended) with >>>> Rumford`s theory of hot and cold radiation, since >>>> both involve _differences_. A beat frequency is given by the >>>> difference of two frequencies and in Rumford`s theory two types of >>>> differences are important.The first is that the relative difference in >>>> temperature between two bodies determines which body is producing more hot >>>> or more cold radiation. The second is that the sign and magnitude of the >>>> difference between the received frequency and the oscillator's frequency >>>> determines whether the radiation increases or decreases the energy of the >>>> oscillator. >>>> >>>> Harry >>>> >>>> On Tue, Oct 13, 2020 at 3:21 PM JonesBeene <jone...@pacbell.net> wrote: >>>> >>>>> >>>>> >>>>> The beat frequency they were after was in the THz range and this was >>>>> in order to fit Hagelstein’s theory of optical phonons – >>>>> >>>>> >>>>> >>>>> … and yes - small gain was seen. >>>>> >>>>> >>>>> >>>>> However, in the earlier similar work without beat frequencies – >>>>> single laser only - much higher gain (order of magnitude more) has been >>>>> reported by Letts/Cravens. >>>>> >>>>> >>>>> >>>>> The reproducibility was apparently better in the later experiments - >>>>> but I do not think the lower result with the beat frequency is leading >>>>> anywhere. >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> *From: *H LV <hveeder...@gmail.com> >>>>> >>>>> >>>>> >>>>> Beat frequencies of two lasers irradiating a surface appear in >>>>> >>>>> _Stimulation of Optical Phonons in Deuterated Palladium_ by Dennis >>>>> Letts and Peter Hagelstein >>>>> >>>>> https://www.lenr-canr.org/acrobat/LettsDstimulatio.pdf >>>>> >>>>> >>>>> >>>>> Harry >>>>> >>>>> >>>>> >>>>> >>>>> >>>>
