Download 3D Laser Microfabrication: Principles and Applications by Sami Franssila PDF

By Sami Franssila

An intensive creation to 3D laser microfabrication know-how, major readers from the basics and idea to its a variety of effective purposes, comparable to the iteration of tiny items or third-dimensional constructions in the bulk of obvious materials.The e-book additionally offers new theoretical fabric on dielectric breakdown, permitting a greater realizing of the diversities among optical harm on surfaces and contained in the bulk, in addition to a glance into the future.Chemists, physicists, fabrics scientists and engineers will locate this a important resource of interdisciplinary wisdom within the box of laser optics and nanotechnology.

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Hence, the laser interaction proceeds with plasma during the remaining part of the pulse. One can consider the electron number density (and thus the electron plasma frequency) as being constant in order to estimate the optical properties of the laser-affected solid. The dielectric function of plasma can be properly described in the Drude approximation when the ions are considered as a neutralizing background [5]: e¼1À x2p x2 þ v2eff þi x2p x2 þ v2eff veff ” e¢ þ ie† x (31) Here the electron plasma frequency, xp, is an explicit function of the number density of the conductivity electrons, ne, and the electron effective mass, m*, x2p ¼ 4p e2 ne =m*.

Rev. B, 58, 2387– 2390, (1998). 29 M. Lenzner, J. Kruger, S. Sartania, Z. Cheng, Ch. Spielmann, G. Mourou, W. Kautek, and F. Krausz, Femtosecond optical breakdown in dielectrics, Phys. Rev. , 80, 4076–4079 (1998). 30 An-Chun Tien, S. Backus, H. Kapteyn, M. Murname, and G. Mourou, Shortpulse laser Damage in transparent materials as a function of Pulse duration, Phys. Rev. , 82, 3883–3886 (1999). 31 L. Sudrie, A. Couairon, M. Franko, B. Lamouroux, B. Prade, S. Tzortzakis and A. Mysyrovicz, Femtosecond laserInduced Damage and Filamentary Propa- 32 33 34 35 36 37 38 39 40 gation in Fused silica, Phys.

The probability of such event can be estimated with the help of (23) as follows: wimp » 2 x2 veÀph eosc   Dgap v2 þ x2 eÀph (24) In this classical approach (the electron is continuously accelerated) the probability of ionization is proportional to the laser intensity (the oscillation energy). The 19 20 2 Laser–Matter Interaction Confined Inside the Bulk of a Transparent Solid electron (hole)–phonon momentum exchange rate changes along with the increase in laser intensity (temperature of a solid) in a different way for different temperature ranges.

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