Figure 1 | Scientific Reports

Figure 1

From: Record-high positive refractive index change in bismuth germanate crystals through ultrafast laser enhanced polarizability

Figure 1

DIC images of waveguide end-faces written at 1,000 mm/min feed rate and energies of (a) 60 nJ, (b) 70 nJ, (c) 90 nJ, (d) 130 nJ and in the bottom row with an energy of 90 nJ at feed rates of (e) 4,000 mm/min, (f) 500 mm/min, (g) 200 mm/min and (h) 100 mm/min, respectively. The writing laser was incident from the top of the images.

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