Abstract

One of the top efficient nonlinear optical crystals, ZnGeP2, is being used at present in parametric oscillators and second-harmonic and combination frequency generators for the mid-IR spectral range. Until recently, this crystal has not been thought of as a magnetic medium, and strong magnetic phenomena were assumed to not occur in it. The recent discovery of a new magnetically ordered state in ZnGeP2 and CdGeP2 single crystals and films doped with Mn shows that this material exhibits ferromagnetic phenomena and, if deposited on a host nonlinear single crystal, can be considered a promising magneto-optical medium. We report on nonlinear parameters of undoped and doped ZnGeP2 and current data on magnetic phenomena in (Zn,Mn)GeP2 and (Cd,Mn)GeP2 ferromagnetic layers and doped ZnGeP2:Mn single crystals. Stabilizing a heterosystem constituted by ferromagnetic layers on a nonmagnetic nonlinear crystal extends the scope of possible designs of magneto-optical, spin-dependent, and magnetically controllable nonlinear optical devices. © 2005 Optical Society of America

© 2005 Optical Society of America

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