Best physics subfields for job prospects?

[Ritzycat]

I am researching different types of physics subfields and the job outlook for each. I know that astrophysics or particle physics don't exactly have the best prospects, for example. What are the sub-fields of physics where PhDs can find excellent jobs in research? I know accelerator physics and biophysics are examples where there is applied research being done.

 

[Greg Bernhardt]

This is a year old, but still relevant
http://www.wired.com/2013/08/the-10-hottest-fields-of-science-research