Nice to see this on HN, this is a big deal. I did research in 2021 to generate Far-UVC using nonlinear plasmonics.
The holy grail for this technology is a Far-UVC Diode. The guy who won the Nobel Prize for the blue LED (IIRC) is working with other physicists at UCSB to try and create said diode: https://www.news.ucsb.edu/2020/019949/uv-lights-way
If you want to learn more about Far-UVC itself (safety, etc), David Brenner is the real MVP:
http://www.columbia.edu/~djb3/
The holy grail for this technology is a Far-UVC Diode. The guy who won the Nobel Prize for the blue LED (IIRC) is working with other physicists at UCSB to try and create said diode: https://www.news.ucsb.edu/2020/019949/uv-lights-way
If you want to learn more about Far-UVC itself (safety, etc), David Brenner is the real MVP: http://www.columbia.edu/~djb3/