By Hiroaki Misawa, Saulius Juodkazis
A radical creation to 3D laser microfabrication expertise, major readers from the basics and idea to its quite a few powerful purposes, corresponding to the new release of tiny gadgets or 3-dimensional buildings in the bulk of obvious fabrics. The booklet additionally offers new theoretical fabric on dielectric breakdown, permitting a greater realizing of the variations among optical harm on surfaces and contained in the bulk, in addition to a glance into the long run. Chemists, physicists, fabrics scientists and engineers will locate this a helpful resource of interdisciplinary wisdom within the box of laser optics and nanotechnology.
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Additional info for 3D laser microfabrication : principles and applications
1 we introduce the 3D intensity point-spread function (IPSF) under the 3D Laser Microfabrication. Principles and Applications. Edited by H. Misawa and S. Juodkazis Copyright 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim ISBN: 3-527-31055-X 38 3 Spherical Aberration and its Compensation for High Numerical Aperture Objectives refractive indices mismatch condition. 2. 4, we will discuss the applications of this spherical aberration compensation method in 3D optical data storage and laser trapping, respectively, corresponding to typical focusing cases from low (high) to high (low) refractive index medium.
Thus, the optical breakdown converts silica into a metallike medium reducing the energy deposition volume by two orders of magnitude and, correspondingly, massively increasing the absorbed energy density. 3 Electron Temperature and Pressure in Energy Deposition Volume to the End of the Laser Pulse The electron-to-ion energy transfer time and the heat conduction time in a hot plasma lies in a range of picoseconds. Therefore, in a sub-picosecond laser–solid 23 24 2 Laser–Matter Interaction Confined Inside the Bulk of a Transparent Solid interaction, the deposited energy is confined to the electron whilst the ions remain cold.
We assume that, in the course of expansion the void attains a spherical shape. Then the void radius reads: 1=3 1=3c 3 2 P r0 labs rvoid ¼ (47) 4 P0 Of course, this is only a qualitative estimate because the equation of state of the laser affected material undergoes dramatic changes as the material cycles from a solid to a melt, to a hot gas and back. Accordingly, the adiabatic constant (or rather the Gruneisen coefficient ) changes in a range from c = 5/3 to c = 3. Nevertheless, an estimate by (47) gives a reasonable estimate that the void radius lies in the sub-micron range.