I Can surface plasmons be used to build GeV gamma-ray lasers?

redirmigician
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I read a paper about coherent surface plasmon amplification by free electron pumping in an article a few days ago. It seems to work as some kind of free electron laser-like light source, and I wonder how high the energy of photons can go in this way. Also I read in another paper about "efficient" generation of "Extremely brilliant" and "collimated" MeV to GeV gamma rays in the plasma accelerator. I wonder if plasmonics can replace ionized gas to achieve this. There is indeed an idea of Plasmonic acceleration, right?

More information:
Creating surface plasmon polariton amplification using free-electron pumping to build a new kind of laser https://phys.org/news/2022-11-surface-plasmon-polariton-amplification-free-electron.html via @physorg_com

Extremely brilliant GeV γ-rays from a two-stage laser-plasma accelerator https://www.science.org/doi/10.1126/sciadv.aaz7240#.Y26Z1wQ3Jf4.twitter

#OpenAcces chapter by @IntechOpen: Future Particle Accelerators https://www.intechopen.com/online-first/83039
 
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redirmigician said:
I read a paper about coherent surface plasmon amplification by free electron pumping in an article a few days ago. It seems to work as some kind of free electron laser-like light source, and I wonder how high the energy of photons can go in this way. Also I read in another paper about "efficient" generation of "Extremely brilliant" and "collimated" MeV to GeV gamma rays in the plasma accelerator. I wonder if plasmonics can replace ionized gas to achieve this. There is indeed an idea of Plasmonic acceleration, right?

More information:
Creating surface plasmon polariton amplification using free-electron pumping to build a new kind of laser https://phys.org/news/2022-11-surface-plasmon-polariton-amplification-free-electron.html via @physorg_com

Extremely brilliant GeV γ-rays from a two-stage laser-plasma accelerator https://www.science.org/doi/10.1126/sciadv.aaz7240#.Y26Z1wQ3Jf4.twitter

#OpenAcces chapter by @IntechOpen: Future Particle Accelerators https://www.intechopen.com/online-first/83039
Plasmons on metal surfaces, as far as I know, usually have energies in the range of 10 to 100 eV. That's more like visible light.
 
The plasma frequency of metals is in the UV, not in the gamma ray range. GeV electrons can only produce incoherent bremsstrahlung.
 
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