Hydrothermal Growth of Lithium Borate Crystals with High Optical Quality (01-034)

Market Overview:

This hydrothermal growth of tetragonal lithium borate crystals produces high optical quality crystals suitable for a wide variety of optical devices. In the current market, optical devices produce a constant demand for high quality single crystals. This market demand has fostered the acceptance of lithium borate crystals. Traditionally, lithium borate crystals are prepared via demanding high pressure methods that only produces small crystals. Clemson University researchers have developed a hydrothermal growth technique that produces lithium borate crystals sufficiently large for optical applications. The approach is economical, easily scalable for production, and results in high optical quality crystals due to the introduction of a wide bandgap. 



Optics devices, Solid-state laser applications, Manufacturing



• Advantageously wide bandgap, allowing the creation of crystal hosts appropriate for ultraviolet laser applications

• Creates uniaxial crystal properties, allowing for the crystal to phase match and act as a birefringent

• Acentric crystal design, increasing the crystals’ application in non-linear optical laser applications


Technical Summary

This hydrothermal growth approach produces tetragonal lithium borate (β-LiBO2) single crystals suitable for various laser applications. The β-LiBO2 crystals contain acentric and uniaxial properties, and exhibit a broad energy range in which no electron states can exist.  These properties are present due to the large bandgap; this is specifically important for optical non-linear solid state laser applications requiring second, third, or forth harmonic generation.  Ultimately, Clemson University researchers developed an economically sound, hydrothermal synthesis method of producing acentric, tetragonal lithium borate crystals that contain considerable potential for near UV, UV and deep UV optical applications.


Stage of Development

Proof of concept


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Inventors:                      Joseph Kolis


Application Type:          Utility


Patent Numbers:            7,374,616


CURF Ref No:                01-034

Patent Information:
Advanced Materials
For Information, Contact:
Andy Bluvas
Technology Commercialization Officer
Clemson University Research Foundation
Joseph Kolis
Photonic Crystals
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