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Recent Progress in Hg-Based Oxysalt Crystals for Nonlinear Optics and Birefringence Applications
Peng-Fei Li1,2, Yu-Jie Wang1, Naifeng Zhuang1
1Institute of Molecular Engineering Plus, College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China.
Inorganic Chemistry
|April 15, 2026
Summary
Mercury-based oxysalt crystals show great potential for nonlinear optical (NLO) and birefringence applications. Recent studies highlight their tunable properties through structural design and mixed-anion engineering for advanced optoelectronics.
Area of Science:
- Solid-state chemistry
- Optical materials science
- Inorganic chemistry
Background:
- Nonlinear optical (NLO) and birefringent crystals are crucial for optoelectronics.
- Mercury-based compounds offer unique electronic and structural properties for enhanced optical performance.
- Anisotropic oxyanions synergize with mercury functional units to achieve desired optical characteristics.
Purpose of the Study:
- To systematically review mercury-based oxysalt crystals reported in the last five years.
- To analyze structure-property relationships for NLO and birefringence.
- To explore future research directions in mercury-based optical materials.
Main Methods:
- Literature survey of 33 Hg-based oxysalt crystals.
- Classification based on anionic groups (nitrites, sulfates, phosphates, selenites, tellurites).
- Analysis of structural features, NLO, and birefringence properties.
Main Results:
- Identified key structural features and properties of Hg-based oxysalts.
- Established correlations between structural units (e.g., HgO3, HgO4, [Hg-Hg]2+) and optical responses.
- Demonstrated the impact of anisotropic oxyanions on NLO and birefringence.
Conclusions:
- Hg-based oxysalts are promising for high-performance optical crystals.
- Mixed-anion engineering presents a viable strategy for developing novel materials.
- Further research is needed to optimize and discover new mercury-based optical materials.
