how to create this logo using TikZ
\includegraphics
If you have a vector version of this logo encapsulated in an .eps file, then you can use the eps2pgf tool that will transform it into a TikZ/pgf plot. It might require a bit of cleaning though.
\includegraphics(logos are usually trademarked entities that should be copied exactly not approximated) – David Carlisle Jan 21 '16 at 10:44