Note that device physics is a field of study in physics.
Let me even go one step further. In many areas of science, what you can do and measure are highly dictated by the quality of instrument and measuring devices that are available. Often, this means what is available commercially. This is often not the case in high energy physics and in some areas of astrophysics. In these fields, especially for major, large scale projects such as a large particle collides, the experiments include the research, design, and the building/construction of new, one-of-a-kind detector and instrumentation. They literally have to invent and build their own instrument! Often these are done by physicists, chemists, material scientists, and engineers. In these fields, detectors and the physics of the detectors, are very much an intrinsic part of the field.
This is no different than what I've described for the accelerator physics field, where physicists in that field have almost the same technical knowledge as engineers.
Physics is such a wide field of study that encompasses so many different areas and expertise. This forum is a good place to debunk a lot of inaccurate ideas about working in this field.
Zz.