Abstract
Detailed comparative spectroscopic studies of Nd3+ doped YAG nanocrystals, transparent ceramic and single crystal have been performed. Although most of the radiative spectral properties of Nd3+ are almost in good agreement between the three hosts, the non-radiative losses are significantly high in nanocrystals, which are attributed due to the presence of large amount of hydroxyl groups on the nanocrystals surface which deteriorates the quality of the material for laser applications. In addition, wavelength dependent scattering loss for the Nd3+ doped YAG nanocrystals is found significantly high compared to those of Nd3+ doped single crystal and ceramic.
Highlights
With the advancement of nanoscience and nanotechnology, transparent ceramic materials have gained much attention among researchers and photonics industry due to their several potential applications
In the fabrication of the transparent ceramics, the primary step is to synthesize the nanoparticle with proper size and shape so that the grains in the final high pressure sintered compact structure are well distributed with less pores, boundaries and other kinds of defects [1,2,3,4,5,6,7,8]
The room temperature UV-VIS-NIR absorption spectra of the sample are shown in Fig. 3 with their spectral band assignments
Summary
With the advancement of nanoscience and nanotechnology, transparent ceramic materials have gained much attention among researchers and photonics industry due to their several potential applications. The amount of light scattering depends on the wavelength of the incident light Most ceramic materials, such as Nd3+: YAG, are formed from fine powders, yielding a fine grained polycrystalline microstructure, which is filled with scattering centers comparable to the wavelength of visible light [6,9,10,11,12]. We are exploring a comparison of various optical properties of Nd doped YAG nanoparticles to those of transparent ceramic and single crystals. Wavelength dependent scattering loss spectrum for nanocrystals has been calculated and compared with those of ceramics and single crystals. To the best of our knowledge, we are reporting for the first time the detailed comparative analyses of spectroscopic properties of Nd3+: YAG nanocrystals and its counterparts ceramic and single crystals
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