Researchers at the Hefei Institutes of Physical Science of the Chinese Academy of Sciences have recently made a groundbreaking discovery in the field of nonlinear magnetic second harmonic generation (MSHG) in monolayer CrPS4. This discovery has opened up new possibilities for the use of this unique material in optoelectronics.
Second harmonic generation (SHG) is a nonlinear optical effect that is typically seen in crystals with broken symmetry. While SHG has been observed in magnetic systems, it is often much weaker in comparison. This limitation has hindered the potential use of magnetic two-dimensional van der Waals materials in optical devices due to the unexplored nonlinear optical properties they possess.
The research team led by Professor Sheng Zhigao found that in monolayer CrPS4, a substantial c type SHG effect induced by ferromagnetic order was observed, a first of its kind in a 2D magnet. This observation is significant as it is comparable in signal strength to the i type SHG effect, which arises from the breaking of crystal structural symmetry. This breakthrough opens up new possibilities for the development of optoelectronic devices utilizing the ferromagnetic order induced SHG effect.
The discovery of the ferromagnetic order induced c type SHG effect in monolayer CrPS4 has far-reaching implications for the field of optoelectronics. This new understanding of the link between SHG and magnetic order in 2D materials provides researchers with a novel approach to harnessing the unique properties of these materials for practical applications.
The research conducted by Professor Sheng Zhigao and his team has shed light on the previously unexplored nonlinear optical properties of monolayer CrPS4. The observation of ferromagnetic order induced c type SHG effects in this material has opened up new possibilities for the development of optoelectronic devices with enhanced functionality. This research marks a significant advancement in the field of nonlinear optics and paves the way for future innovations in the use of magnetic two-dimensional van der Waals materials in optical devices.