I have been working under a supervisor in the field of microwave circuits and devices. I have been told that he would be willing to supervise me in the graduate program, and if I am interested, I should begin to think about what I would like to do. I have some confusions regarding this. Is "what I would like to do" supposed to be specific? Or does the supervisor provide a bit of aid, as long as the student has a general idea of the direction they want to go? For example, I am interested in utilization of synchrotron radiation to perform X-ray and UV lithography on microwave decives and circuits. At the undergraduate level, I know this creates a high-aspect ratio, which thereby may be able to reduce planar area (and therfore, take up less space on boards). Beyond this, my knowledge base lacks, although it would improve upon entering graduate school and taking some classes. Is my general direction sufficient to approach the supervisor, or is a more well-defined direction required? For example, would I have to know whether I am demonstrating the high-aspect ratio on a specific decive (such as a coupler, resonator, antenna, etc)? Or would it be at this point that they chime in with a suggested decive or component?