Talk directly with your current manager about possibly adding work responsibilities and about your future work interests.
Make it known that you desire to meet and exceed expectations of yourself in your current role and to contribute excellent value. Know your role and go above and beyond at times. Note that you are interested in being promoted and would like to discuss how that could possibly happen. Use and show facts and data about your achievements and contributions to date, especially recently (i.e. your win list, affirmations of a job well done, accomplishments).