Soon after N. Bloembergen arrived at Harvard University, E.M. Purcell and his students, H.C. Torrey and R.V. Pound, detected nuclear magnetic resonance for the first time. Together, they wrote a seminal paper in 1957 describing the basic principles of nuclear spin relaxation. Bloembergen also worked on microwave spectroscopy and the maser concept. In 1981, he received a Nobel prize with Arthur Schawlow and Kai Siegbahn for their development of laser spectroscopy.