研究目的
To review the diverse benefits of Raman and micro-Raman measurements when carried out using laser excitation in the near-ultraviolet wavelength range for the study of electronic and photonic materials, focusing on stress mapping, thermal effects, and material properties.
研究成果
Near-ultraviolet Raman and micro-Raman spectroscopy offer distinct advantages for studying electronic and photonic materials, including improved spatial resolution, the ability to probe near-surface regions, and the reduction of fluorescence interference. These techniques have been successfully applied to stress mapping, thermal effects analysis, and the study of material properties in silicon, gallium nitride, and carbon materials.
研究不足
The review focuses on the near-ultraviolet wavelength range, excluding deep-UV studies due to the difficulty in obtaining optical materials for deep-UV measurements. The spatial resolution, while improved over visible excitation, is still limited by diffraction and practical experimental conditions.
1:Experimental Design and Method Selection:
The review discusses the use of near-ultraviolet Raman and micro-Raman spectroscopy for studying electronic and photonic materials, highlighting the advantages of reduced focal spot size and shallower optical penetration depth.
2:Sample Selection and Data Sources:
The study covers a range of materials including silicon, gallium nitride, and carbon materials like graphite, graphene, and diamond grown using chemical vapor deposition.
3:List of Experimental Equipment and Materials:
Near-ultraviolet laser excitation sources (e.g., argon, krypton, helium-cadmium lasers), diffraction-limited optics, and spectrometers are mentioned.
4:Experimental Procedures and Operational Workflow:
The methodology involves using near-ultraviolet excitation for Raman and micro-Raman measurements to achieve high spatial resolution and probe near-surface regions or interfaces.
5:Data Analysis Methods:
The analysis includes measuring shifts in phonon energies to study stress and temperature effects, and exploiting resonance effects and reduced fluorescence for clearer spectra.
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