Related Experiment Video
Updated: May 20, 2025
11:10
Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
Published on: May 23, 2018
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Two-Step Substitutions of Square Pyramidal VO5 with CdO4Br to Achieve Higher Laser-Induced Damage Threshold from
Baozhu Zhu1, Lei Geng1, Shoubao Zhang1
1School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China.
Inorganic Chemistry
|March 24, 2025
Summary
Two novel mid-infrared nonlinear optical crystals, Rb4CdV5O15Br and Rb3CdV4O12Br, were synthesized using aliovalent substitution. These materials exhibit strong second harmonic generation and high laser-induced damage thresholds, advancing infrared laser technology.
Area of Science:
- Materials Science
- Solid State Chemistry
- Optics
Background:
- Mid-infrared (MIR) nonlinear optical (NLO) materials are essential for laser technology.
- Rational structural design of MIR NLO materials presents significant challenges.
- Aliovalent substitution is a promising strategy for designing new NLO materials.
Purpose of the Study:
- To design and synthesize novel MIR NLO crystals using the aliovalent substitution strategy.
- To investigate the structural, optical, and laser-induced damage threshold properties of the synthesized crystals.
- To provide insights into the structure-property relationships for designing advanced infrared oxide crystals.
Main Methods:
- Crystal synthesis guided by the aliovalent substitution strategy.
- Crystallographic analysis to determine crystal structures and space groups.
- Optical measurements to evaluate second harmonic generation (SHG) responses.
- Laser-induced damage threshold (LIDT) measurements.
Main Results:
- Two novel MIR NLO crystals, Rb4CdV5O15Br (space group P4) and Rb3CdV4O12Br (space group Pba2), were successfully synthesized.
- Rb3CdV4O12Br shows strong phase-matched SHG responses (7.7 × KDP@1064 nm and 0.9 × AGS@2.1 μm).
- Rb4CdV5O15Br exhibits phase matching at 2.1 μm with a strong SHG response (3.4 × AGS@2.1 μm).
- Both crystals demonstrate high LIDT values (40 × AGS@1064 nm for Rb4CdV5O15Br and 70 × AGS@1064 nm for Rb3CdV4O12Br).
- Two-step substitutions led to enhanced LIDT in the polar oxybromides compared to the parent oxide.
Conclusions:
- The aliovalent substitution strategy is effective for designing novel MIR NLO materials.
- Rb4CdV5O15Br and Rb3CdV4O12Br are promising candidates for infrared laser applications due to their strong SHG and high LIDT.
- The findings contribute to the structural chemistry of vanadates and offer new design principles for infrared oxide crystals.
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