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Roman Pisarev, Ioffe Physical-Technical Institute, Russian Academy of Sciences, St. Petersburg, Russia

Spectroscopic studies of optical harmonics generation in magnetics, multiferroics, and semiconductors


Optical harmonics generations are nonlinear coherent phenomena which are widely used in frequency conversion devices. From the practical point of view, these processes provide a high efficiency in the regions of high transparency when the attenuation of both fundamental and harmonics light is as low as possible. On the other hand, the studies of these conversion processes under resonance conditions open new possibilities to study microscopic mechanisms of nonlinear light matter interaction. Up to now these possibilities remain poorly explored. In addition, these studies provide much more information when performed at low temperature with high spectral resolution and in the presence of applied magnetic and electric fields.

After a brief introduction, we will discuss results obtained in magnetic materials and multiferroics (Cr2O3, YMnO3, TbMn2O5, magnetic garnet films, et al), and in semiconductors (GaAs, CdTe, ZnO, EuTe). These studies showed that magnetic ordering and external fields give rise to novel mechanisms of nonlinear coherent light-matter interaction. For example second harmonic generation can distinguish antiferromagnetic domains indistinguishable in linear optics. Results obtained before the year 2005 can be found in a review paper [1], and in semiconductors before the year 2010 in a paper [2].

 

[1] M. Fiebig, V. V. Pavlov, and R. V. Pisarev, J. Opt. Soc. Amer. B 22, 96 (2005).

[2] R. V. Pisarev et al. Phys. Stat. Sol. B 247, 1498 (2010).

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