Rich information on 2D materials revealed by optical second harmonic generation.

Area of Science:

• Materials Science
• Condensed Matter Physics
• Optoelectronics

Background:

• Two-dimensional (2D) materials exhibit unique properties driving research and applications.
• Characterization methods are crucial for understanding and utilizing these properties.
• Optical second harmonic generation (SHG) offers a sensitive and versatile approach.

Purpose of the Study:

• To review the experimental applications of SHG in characterizing 2D materials.
• To highlight SHG's capabilities in probing material properties.
• To provide an outlook on future SHG-based research in 2D materials.

Main Methods:

• Utilizing optical second harmonic generation (SHG) as a characterization technique.
• Analyzing SHG's sensitivity to atomic scale features.
• Leveraging SHG's ability to probe crystallographic, electronic, and magnetic properties.

Main Results:

• SHG is highly sensitive to the unique properties of 2D materials.
• SHG can extract diverse information including symmetry properties.
• SHG is non-invasive and suitable for high-throughput studies.

Conclusions:

• SHG is a powerful and versatile tool for 2D materials research.
• SHG facilitates the exploration of exotic physical properties.
• SHG holds significant potential for future applications in electronics and optoelectronics.