Instead of pencil, paper, and eraser, we can use combinations of lasers and magnetic materials to write, read, and and erase information by varying the temperature and magnetic field. Here we apply our laser "pencil" to magnetic "paper" to write the letter “N” (Go Cornhuskers!!). This technique allows us write, erase, and rewrite tiny magnetic memories like those found in your computer hard drive and other devices, using a precise, non-contact tool. Click to learn more about how it works!
sadenwalla12019-02-06T13:53:13+00:00Writing the Magnetic Alphabetsadenwalla12019-02-06T13:53:13+00:00
Laser pencils on magnetic paper