Nonlinear Optical Crystals for Ultraviolet and Infrared Frequency Conversion
This community develops crystalline materials that convert laser light into new wavelengths, specifically targeting the ultraviolet and infrared spectra for high-power laser systems.
The research focuses on synthesizing single crystals with strong second-harmonic generation and large birefringence, properties essential for efficient frequency conversion. Borates, fluorides, and phosphates dominate the chemical space, often incorporating rare-earth or alkali metal cations to tune optical anisotropy and band gaps. Key design strategies include engineering π-conjugated units, optimizing crystal structures for deep-ultraviolet transparency, and balancing high nonlinearity against laser-induced damage thresholds. The work spans hydrothermal synthesis, crystal growth, and structural characterization to identify materials that overcome the traditional trade-off between strong optical response and material stability.
The community is most heavily represented in boron research, accounting for 1.0% of all tracked boron papers, with 1,576 papers in this group. Sulfur and potassium also show significant presence, contributing 812 and 532 papers respectively, though their shares of total element research are lower at 0.3% each.
The community comprises 10,473 papers, publishing primarily in Inorganic Chemistry, the Journal of Solid State Chemistry, and Zeitschrift für anorganische und allgemeine Chemie.
Recent work continues to explore vacuum ultraviolet second-harmonic generation in borate fluorides and the engineering of optical anisotropy in hybrid organic-inorganic frameworks, with specific attention to deep-UV transparent sulfonamide fluorides and rare-earth metal borate fluorides.