Munich physicists have developed a novel electron microscope that can visualize electromagnetic fields oscillating at frequencies of billions of cycles per second.
Temporally varying electromagnetic fields are the driving force behind the whole of electronics. Their polarities can change at mind-bogglingly fast rates, and it is difficult to capture them in action. These fields control the flow of electrons in components such as ‘field-effect’ transistors, and are ultimately responsible for the manipulation, flow and storage of data in our computers and smartphones. However, a better understanding of the dynamics of field variation in electronic components, such as transistors, is indispensable for future advances in electronics. ...
