Morphology of femtosecond laser-induced structural changes in bulk transparent materials
- 1 March 2004
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 84 (9), 1441-1443
- https://doi.org/10.1063/1.1650876
Abstract
Using optical and electron microscopy, we analyze the energy and focusing angle dependence of structural changes induced in bulk glass by tightly focused femtosecond laser pulses. We observe a transition from small density variations in the material to void formation with increasing laser energy. At energies close to the threshold for producing a structural change, the shape of the structurally changed region is determined by the focal volume of the objective used to focus the femtosecond pulse, while at higher energies, the structural change takes on a conical shape. From these morphological observations, we infer the role of various mechanisms for structural change.Keywords
This publication has 25 references indexed in Scilit:
- Femtosecond Laser-Induced Damage and Filamentary Propagation in Fused SilicaPhysical Review Letters, 2002
- Laser-induced breakdown and damage in bulk transparent materials induced by tightly focused femtosecond laser pulsesMeasurement Science and Technology, 2001
- Waveguide writing in chalcogenide glasses by a train of femtosecond laser pulsesOptical Materials, 2001
- Three-Dimensional Optical Data Storage in Vitreous SilicaJapanese Journal of Applied Physics, 1998
- Femtosecond Optical Breakdown in DielectricsPhysical Review Letters, 1998
- Three-Dimensional Optical Memory Using Glasses as a Recording Medium through a Multi-Photon Absorption ProcessJapanese Journal of Applied Physics, 1998
- Densification of fused silica under 193-nm excitationJournal of the Optical Society of America B, 1997
- Writing waveguides in glass with a femtosecond laserOptics Letters, 1996
- Laser-induced breakdown by impact ionization in SiO2 with pulse widths from 7 ns to 150 fsApplied Physics Letters, 1994