All they have so far are computer models that it is possible in theory, for a limited bandwidth.
Now, assuming they lick the bandwidth problem, all they have to do is figure out how to make the molecules they need and arrange them in the configuration required.
And how to mass produce the material large enough (acre size) lots.
I'm not sure you understand the CTD programs
The USG incl DARPA, Commerce, State and all Services (USAF, USN, Army, USMC and sometimes USCG) come out once per year to review a shortlist of techs that are already selected out of an initial group of say 50 possibles. Its cut down to 20 or so so as to be easily digested in the month that they are in attendance. ONR undertake similar tasks in Europe. eg I used to see the London based ONR Officer regularly attend euro shows such as the Hanover Messe Energy generation and management events. He was a busy lad - and he was only interested in CTD's as all the allies were in regular contact with each other sharing academic papers and proposals. The visits therefore are meant to be about witnessing product - ie beyond theory
What they see are CTD's - they're not academic dissertations as we already have processes in place to deal with academic ideas or as often euphemistically referred to as "good idea fairy proposals"
So they come out and witness these techs in operation. The japanese used a different technique to achieve a similar req a few years back but it was energy intensive.
A good example of general media getting things wrong is in the article posted by richardparker07 in one of the USN threads. The article mentions US capability being triggered in 2009 - when in actual fact it was much earlier. The techs discussed in that article were shown to the USN in 2003 and they got involved in 2004. I worked on similar iterations in Hawai'i in 2006-7.
In this case the CTD has been established on a static ground model a couple of years ago - the USAF interest for their own purposes is more than achievable as CTD has been established. POC for their platform is the next stage and nobody considers it beyond achievability considering how far its come in 2 years
bear in mind that there are existing aircraft which already have wavelength management already in place but its effectiveness is at specific altitudes
they're not having to reinvent the wheel here as core capabilities are already in service
its an energy management issue