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Nanomodification of Glass Using fs Laser



We review the interaction of glass with intense ultrashort laser pulses revealing new phenomena and recent demonstrations of rewritable 5D optical memory and polarization imaging filter mediated by the self-organization of nanostructure. Particularly, we experimentally verify linearly polarized intense ultrashort pulses can control the direction of local optical anisotropy in homogeneous medium based on the interference between photon and electron plasma. These so-called “nanogratings” composed of the photoinduced oxygen defects emerge in the course of multiple laser pulses and are oriented perpendicularly to the laser polarization direction. The nanograting structures, which exhibit form birefringence, have evolved from residual birefringence along with lowering threshold for defect formation into self-assembly of oxygen defects.