Device for producing electromagnetic radiation.

摘要

When by means of electrons of high energy (7) generated by a semiconductor cathode (20) population inversion is obtained in an active region (2) of a laser structure (1), a laser action is obtained. This laser action can be restricted to a narrow strip (3) of the active region (2). By means of deflection means (10,21) preferably constituted by acceleration electrodes (21) of the semiconductor cathode (20), the position of the narrow strip (3) in which inversion occurs and hence the position of the emanating electromagnetic beam (6) can be varied. Such a displacing beam (6) can be used for scanning (writing) information carriers (CD, DOR, VLP-, videotape).