The Michigan Engineer News Center

Richard Passman, space-age engineer who kept his secrets, dies at 94

Richard Passman was an aeronautical engineer with a hand in designing the earliest spy satellites, supersonic planes and long-range missiles. Mr. Passman had a leadership role in many of the technologies that gave the United States strength in aircraft, spy satellites and missiles.
The electrons absorb laser light and set up “momentum combs” (the hills) spanning the energy valleys within the material (the red line). When the electrons have an energy allowed by the quantum mechanical structure of the material—and also touch the edge of the valley—they emit light. This is why some teeth of the combs are bright and some are dark. By measuring the emitted light and precisely locating its source, the research mapped out the energy valleys in a 2D crystal of tungsten diselenide. Credit: Markus Borsch, Quantum Science Theory Lab, University of Michigan.

Mapping quantum structures with light to unlock their capabilities

Rather than installing new “2D” semiconductors in devices to see what they can do, this new method puts them through their paces with lasers and light detectors. | Medium Read