Why would THz waves offer higher resolution in imaging that IR? I understood that the shorter the wave, the higher the (lower bound on) attainable resolution?<p>Also, unrelated but no point in commenting twice: millimetre wave astronomy is a big topic of the last decade or two. How does the THz technology described here link to what's used in mm wave detection?
"THz radiation is non-ionising, so it’s safe to use on humans"<p>Great logic. "This cheeseburger does not contain arsenic and so it is safe for consumption."<p>It would be much better to say "We haven't really done much study about it but as of now we do not know of any side effects at reasonable power levels."
The article puts the lack of development down to technology but it's arguably the lack of applications that came first. We've developed solutions for most of the spectrum (anything below cosmic gamma rays) because we needed to and the tech followed. As we find applications it will follow.<p>Also, not to be pedantic but about the terminology, the spectrum below the terahertz range is generally called radio (with optical or light for above it) not 'electronic', while the technology for producing frequencies above it is called photonics (with electronics for below it), not 'optics'.