Research team demonstrates coherent ultrafast photoemission from carbon nanotube emitter

https://phys.org/news/2023-10-team-coherent-ultrafast-photoemission-carbon.html

"2 nm single-walled carbon nanotubes achieved ultrafast resonant tunneling single-electron emission... double barrier enabling 0-dimensional cap as electron resonant cavity... splitting 2 degenerate quantum states caused by static field and laser field,controls electron emission... electron emission energy spread 57meV, order magnitude lower than that of metals... close to time-energy uncertainty principle limit... electron probes with sub-angstrom spatial resolution and femtosecond time resolution... attosecond electron microscopy"