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Investigating infrared nonlinear optical chalcohalides with distorted Ge3S9 clusters
Cicirello, Gary
Cicirello, Gary
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Authors
Cicirello, Gary
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2022-04-15
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Cicirello, Gary. 2022.
Investigating infrared nonlinear optical chalcohalides with distorted Ge3S9 clusters -- In Proceedings: 21st Annual Undergraduate Research and Creative Activity Forum. Wichita, KS: Wichita State University, p. 25
Abstract
Nonlinear optical (NLO) materials in the infrared range are an essential part of
the harmonic conversion process to expand the wavelength range of solid state lasers.
Current IR NLO materials possess certain drawbacks that make them inefficient to
produce high powered IR lasers. Strategies can be employed to design potential IR NLO
materials that surpass the current commercial materials, including theoretical study of
noncentrosymmetric (NCS) chalcogenides to find potential candidates, and the
investigation of Ge3S9 clusters composed of multiple intrinsically distorted GeS4
tetrahedra combined to attempt to produce NCS crystal structures for NLO applications.
Incorporation of halogens into sulfide compounds can also increase the band gap of the
material and improve laser damage threshold. These strategies are combined and ignite
our interest into one IR NLO candidate: KBa4Ge3S10Cl, derived from NaBa4Ge3S10Cl.
Preliminary analysis on the compound has been performed, including solid state UV-Vis
spectrophotometry to uncover optical properties and powder X-ray diffraction to confirm
phase purity and crystal structure. Further investigations will be done on linear and
nonlinear optical properties of this compound, as well as investigation into the synthesis
of analogues to the compound and other new chalcohalides that incorporate Ge3S9
clusters.
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Presented to the 21st Undergraduate Research and Creative Activity Forum (URCAF) held at the Rhatigan Student Center, Wichita State University, April 15, 2022.
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Wichita State University
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URCAF
v.21
v.21