Optical Bistability in a Magnetic Semiconductor

Chi C. Sung, C. M. Bowden

Jizhou Liu, Xuezhong Wang, Chenjia Chen +1 more

Magneto-optical bistability in diluted magnetic semiconductor Cd 1-x Mn x Te is realized. The bistability is created by the giant Faraday effect in Cd 1-x Mn x Te and the saturation characteristic of the magneto-optical feedback system. The bistability characteristic depends on the orientation angle α of the polarizers of the Faraday modulator and on the temperature of the sample.

Sukanta Kumar Tripathy, Mihir Hota

In this paper we report the possibility of optical bistable switching in a hybrid magnetic semiconductor. We on the basis of our formulation found that a magnetic semiconductor can be made to behave as a optical bistable switch by suitably controlling the magnetic impurity concentration.

В. С. Днепровский

David A. B. Miller

Bohdan M. Nitsovich, Claudia Yu. Zenkova, A. A. Zinchenko

The influence of an external magnetic field on optical features of semiconductor exciton spectra is researched in this work. It is shown that the magnetic field brings about the shift of the exciton level in the high-energy spectrum area. This causes the arising of a unique effect-- brightening-- of the crystal on the fixed external excitement frequency with the growth of the magnetic intensity value. The combination of electronic and magnetic characteristics of a crystal in an exciton frequency region opens new possibilities of giving control over the bistable behavior of the crystal. It is shown that the magnetic- optical response of a semiconductor on laser excitation generates bistable loops, both on the intensities of falling light (tau) (T) and in the size of the magnetic field-- (tau) (Hyields).