Magneto-optical properties of wider gap magnetic semiconductor ZnMnTe and ZnMnSe films
Type:
SSO Seminar
Date/Time:
2009-12-02 16:00
Location:
Weniger 304
Event speaker:
Masaaki Imamura, Fukuoka Institute of Technology, Fukuoka, Japan
Title:
Magneto-optical properties of wider gap magnetic semiconductor ZnMnTe and ZnMnSe films
Contact:
Guenter
Abstract
II-VI based magnetic semiconductors (MSs) with a direct and wide optical band gap are expected to show high potential for optical applications utilizing short wavelength laser diodes (LDs), such as 532-nm green and 475-nm blue LDs. II-VI MSs Zn1-xMnxTe and Zn1-xMnxSe exhibit their absorption edges at 428-544 nm and 428-458 nm, respectively. The edge is not so influenced by the Mn concentration, as is typically observed in Cd1-xMnxTe. We have confirmed that the Faraday rotation F in the ZnMnTe films deposited on quartz glass (QG) substrates is large near the absorption edge. This work reports the magneto-optical characteristics of ZnMnTe and ZnMnSe films synthesized on QG, and shows the result of a direct Faraday rotation observation successfully made for the ZnMnTe film under ac magnetic fields.