研究目的
Investigating the broadband (white) light emission induced by laser absorption and optimized by thermal injection in Nd3+:Y2SiO5 ceramic powder.
研究成果
The study demonstrates that broadband up-conversion emission in Nd3+-doped yttrium silicate ceramic powder is dependent on the rare-earth doping concentration and laser excitation power. Thermal injection reduces the laser threshold and enhances the emission intensity, indicating a strong thermal influence on the phenomenon. The findings suggest potential applications in phosphor technology under ambient air conditions.
研究不足
The microscopic mechanism behind the broadband emission phenomenon is still unclear, and the study is limited to ambient air conditions with specific doping concentrations and laser power thresholds.
1：Experimental Design and Method Selection:
The study involves the synthesis of Nd3+-doped yttrium silicate ceramic powders by combustion method and their characterization under laser excitation.
2：Sample Selection and Data Sources:
Samples with
3：0 and 0 wt. % doping concentrations of Nd3+ were prepared and analyzed. List of Experimental Equipment and Materials:
Instruments used include an Inel Equinox-1000 diffractometer, VEGA 3 TESCAN SEM, diode laser operating at ~808 nm, and a compact spectrometer (Ocean Optics USB4000).
4：0). Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The powder samples were excited with a CW near-infrared laser, and the emitted light was collected and analyzed. The temperature of the sample was externally controlled to study its effect on the emission.
5：Data Analysis Methods:
The data analysis was performed with Origin software, focusing on the spectral profiles and intensity changes with excitation power and temperature.
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Compact spectrometer
USB4000
Ocean Optics
Luminescence collection and analysis
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Inel Equinox-1000 diffractometer
Equinox-1000
Inel
X-ray powder diffraction analysis
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VEGA 3 TESCAN Scanning Electron Microscope
VEGA 3
TESCAN
Surface morphology recording
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Diode laser
Laser Photonics Technology, Inc.
Continuous-wave excitation at ~808 nm
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Short pass 750 nm cut-off optical filter
10SWF-750-B
Newport
Elimination of back-scattered laser light
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