Calculated and experimentally determined plane-of-polarization rotation curves are presented that demonstrate that magneto-optical properties of transitions between degenerate energy levels may be used to design low-loss components for laser systems over the uv to far-ir spectral region. For devices such as optical rotators and modulators, magneto-optical properties of discrete-energy-level transitions offer significant advantages over bulk properties that are used in conventional designs.
G. A. Tanton and H. C. Meyer, "Magneto-optical properties of bound-state transitions, and applications," J. Opt. Soc. Am. 65, 1261-1263 (1975)