RE:Mrs FJThis is old information related to work that was performed at BAE:
The POET platform was moved forwards. The nHFET and the pHFET were realized as a complementary pair and operated as a ring oscillator. It was determined that the pHFET was slow because of the large capacitance between gate and source and a technique using oxygen implants was devised to solve this problem. The devices were scaled to 100nm and it was found that a new contact technique was required to eliminate the short channel effect and the drain induced barrier lowering. Also lift-off had to be eliminated as unsuitable for production. A new metallurgy was devised. The laser was fabricated to operate cw by correcting both top and bottom mirrors and achieving the correct ion implant parameters for current steering. It was found that equal numbers of wells at each interface are necessary to obtain low threshold current. A new approach to the epitaxial structure was devised to enable a translation of the growth to long wavelength and extremely high performance transistors due essentially to high In content channels. Finally the approach to build spot size converters for low insertion loss coupling was determined as well as the fabrication for in-plane resonators and whispering gallery mode resonators.
According to Jingming Yao they achieved 50 nm reduction. But again you are missing the point. A lot of work is required to further develop PET and it is not something that POET could achieve quickly with limited funds. At least that is my understanding. So what Suresh is doing is what needs to be done to develop the optical integration side? Is it that hard for people here to comprehend?
And just for the record Geoff stated that he had a solution to the above issues. I tend to believe that he did. Is that solution being implemented under NDA as we speak? Again does it matter in the big picture of what POET is doing right now in terms of public disclosure?