On Fri, Sep 24, 2021 at 10:21 AM Lawrence Crowell < [email protected]> wrote:
*> I am curious by what is meant by a single photon being nonlinear. I > could not find this on arxiv.* > If this explanation is incorrect, blame me and not the authors of the article. But if I'm reading them correctly they use that term because they used a pump laser to produce a population inversion in the laser microcavity with the higher vibrational energy being exactly one quantum level above the other. They could control it so precisely that when they increased the excitation density of the micro resonating chamber by just one photon the entire laser transitioned from the linear to the nonlinear regime. They found that due to the material used there was a wide spread in the momentum distribution of the exciton, so the n-plane momentum component of the trigger photon was not important, only the energy level of the photon was. John K Clark See what's on my new list at Extropolis <https://groups.google.com/g/extropolis> uoo 42h > > To those who claim that Moore's law is approaching its end I would point >> them to Wednesday's issue of the journal "Nature". IBM researchers report >> they have developed an optical replacement for the transistor that operates >> at room temperature, requires no cooling because it approaches the quantum >> theoretical limit on energy efficiency, and is about 1000 times faster >> than any existing transistor. More work will be required before an entire >> microprocessor can be made using these devices but I find this development to >> be enormously encouraging. >> >> The reason it's so energy efficient is that it only takes one photon from >> a very weak laser to switch a far more powerful laser on and off. And >> besides acting as a switch it can also act as an amplifier by boosting the >> intensity of a laser beam by a factor of 23,000. >> >> Single-photon nonlinearity at room temperature >> <https://www.nature.com/articles/s41586-021-03866-9> >> >> > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/CAJPayv1WcJxMtVOqbQH680jZVio%3DzKuwD437omfR0D96JpopiQ%40mail.gmail.com.
