Fig. 1. Experimental setup and schematic process for fabrication of GDP shell.

Fig. 2. Analysis of nodular-like defects on GDP surface by SEM scan and power spectrum.

Fig. 3. Cross-sectional SEM image and EDS results of GPD shell graded doped with Ge.

Fig. 4. Process for fabrication of HGM by Si:GDP method.

Fig. 5. Photograph of HGM made by Si:GDP method.

Fig. 6. XRF spectrum of an argon filled Si:GDP.

Fig. 7. Microphotograph of batch PS shells and computed tomography image of individual PS shell.

Fig. 8. Microphotograph of HDC shell.

Fig. 9. XRD pattern of HDC shell.

Fig. 10. Designed locus for the diamond cutter and AFM image of the modulating sample surface.

Fig. 11. Thickness distribution of a complex shaped sample.

Fig. 12. Configuration of the semi-automatic assembly system.