Figure 2.

Optical density within the central region of irradiated glass measured before (original glass,solid line) and after laser irradiation with polarized light, parallel (dotted) or perpendicular (dashed) with respect to laser pulse polarization and line direction (see Fig. 1). The spectra of non-irradiated samples are identical for parallel and perpendicular polarization

Seifert et al. Nanoscale Research Letters 2009 4:1380-1383   doi:10.1007/s11671-009-9408-5