| 摘要 |
PROBLEM TO BE SOLVED: To make effective inductive radiation in a plurality of wave lengths by making an energy interval of a central wave length larger than a line spreading energy of the first and the second whichever larger, and by providing a means of preventing buffering of electrons from a fourth level to a third level. SOLUTION: For example, a lower mini band 1 has a first and a second energy levels and an upper mini band 2 has a third and a fourth levels. Light is generated by a first autonomous radioactive ray having a central wave length λ1 and a first line spreading energy caused by an electron transition between the fourth and the first levels. Further, light is generated by a second autonomous radioactive ray having a central wave length λ2 and a second line spreading energy caused by an electron transition between the third and the second levels. An energy interval of the central wave length is larger than a larger line spreading energy of the first and the second and a means of preventing of a buffering of electrons from the fourth level to the third level. |
