Raman and Photoluminescence Spectroscopy with a Variable Spectral Resolution

Raman and photoluminescence (PL) spectroscopy are important analytic tools in materials science that yield information on molecules’ and crystals’ vibrational and electronic properties. Here, we show results of a novel approach for Raman and PL spectroscopy to exploit variable spectral resolution by using zoom optics in a monochromator in the front of the detector. Our results show that the spectral intervals of interest can be recorded with different zoom factors, significantly reducing the acquisition time and changing the spectral resolution for different zoom factors. The smallest spectral intervals recorded at the maximum zoom factor yield higher spectral resolution suitable for Raman spectra. In contrast, larger spectral intervals recorded at the minimum zoom factor yield the lowest spectral resolution suitable for luminescence spectra. We have demonstrated the change in spectral resolution by zoom objective with a zoom factor of 6, but the perspective of such an approach is up to a zoom factor of 20. We have compared such an approach on the prototype Raman spectrometer with the high quality commercial one. The comparison was made on ZrO2 and TiO2 nanocrystals for Raman scattering and Al2O3 for PL emission recording. Beside demonstrating that Raman spectrometer can be used for PL and Raman spectroscopy without changing of grating, our results show that such a spectrometer could be an efficient and fast tool in searching for Raman and PL bands of unknown materials and, thereafter, spectral recording of the spectral interval of interest at an appropriate spectral resolution.

The Material of the Resonant Vibration Impact Motivates the Influence of and the Simulation Analysis

This paper to the resonant vibration conveying material on the effect of the shock of geologic detailed analysis to research, perfect the resonant vibration against the motive of the dynamic model. Application of the method of harmonic balance system dynamics equation of solution, and draw the conclusion that, under geological body dynamics of the zoom factor amplitude frequency response curve. A test bed to the actual parameters is simulated, on the test, the displacement of the geological time response curve. The results show that: consider material impact and without considering the impact of material, compared the antiresonant frequency decreases, and in the near antiresonance point, the amplitude becomes big bodies.