Self-Organized Surface Structures with Ultrafast White-Light [electronic resource] : First Investigation of LIPSS with Supercontinuum /
Uhlig, Sebastian.author.
Sebastian Uhlig presents the first experimental investigation of self-organized surface structures (LIPSS) generated by ablation from different (semiconductor and metallic) targets with an ultrafast white-light continuum (WLC) spreading in wavelength from 400-750 nm. The main goal is to study the possibility of LIPSS formation upon irradiation with an incoherent and polychromatic light source (e.g. the WLC) in order to discriminate between the two debated formation scenarios. The generation of a suitable WLC in terms of sufficient white-light pulse energy, broad spectral bandwidth, and low spatial coherence for the LIPSS generation, as well as the characterization of this WLC are additional important objectives of this work. Contents Introduction to Laser Induced Periodic Surface Structures (LIPSS) Introduction to White-Light Continuum Generation Characterization of White-Light Supercontinuum Self-Organized Pattern Formation with Ultrafast White-Light Target Groups Lecturers, researchers and students in the fields of Material Science, Microsystems, Engineering The Author Sebastian Uhlig studied physics at Brandenburg University of Technology Cottbus-Senftenberg and wrote his Master Thesis at the Chair of Experimental Physics II, under the supervision of Prof. Dr. Jürgen Reif. Currently, he is employed at the Fraunhofer Institute for Photonic Microsystems in Dresden, where he works on integrated sensors for a new class of electrostatic actuators.
Description based upon print version of record.
Table of Contents; Abbreviations, Constants & Symbols; Abstract; Introduction; Chapter 1 Introduction to Laser-Ablation &-Surface Structuring; 1.1 Femtosecond Laser Ablation of Metals and Semiconductors; 1.2 Laser-Induced Periodic Surface Structures; 1.2.1 A Universal Phenomenon; 1.2.2 "Static" (Interference) Model; 1.2.3 "Dynamic"(Self-Organization) Model; Chapter 2 Generation of White Light Supercontinuum; 2.1 Nonlinear Optical Effects; 2.1.1 Self-Focusing; 2.1.2 Self-Phase Modulation; Chapter 3 Instrumentation and Experimental Setup; 3.1 Laser System and Beam Quality; 3.2 Experimental Setup
3.3 Short-Pass Filters3.4 Sample- and Spectral-Analysis Devices; Chapter 4 Characterization of White Light Supercontinuum; 4.1 Onset of Continuum Generation; 4.2 Energy Conversion Efficiency & Continuum Behavior; 4.3 White-Light Polarization; 4.4 Spatial Properties; 4.5 Long Term Stability; 4.6 Spatial Coherence; 4.6.1 Filament Interference; 4.6.2 Pump-Laser; 4.6.3 White-Light; 4.7 Conclusion; Chapter 5 Self-Organized Pattern Formation with Ultrafast White-Light; 5.1 White-Light Beam Propagation; 5.2 Image Processing and Period Length Determination
5.3 Structure Formation on Various Materials5.3.1 Silicon; 5.3.2 Stainless Steel; 5.3.3 Copper; 5.3.4 Brass; 5.4 Effect of White-Light Polarization; 5.5 EDX-Measurements; Chapter 6 Conclusion & Outlook; Appendix; A Temporal Intensity distribution and Pulse duration of the Laser-Beam; B Spatial Intensity Distribution and Propagation of the Laser-Beam; Bibliography; Acknowledgments
Includes bibliographical references.
Sebastian Uhlig presents the first experimental investigation of self-organized surface structures (LIPSS) generated by ablation from different (semiconductor and metallic) targets with an ultrafast white-light continuum (WLC) spreading in wavelength from 400-750 nm. The main goal is to study the possibility of LIPSS formation upon irradiation with an incoherent and polychromatic light source (e.g. the WLC) in order to discriminate between the two debated formation scenarios. The generation of a suitable WLC in terms of sufficient white-light pulse energy, broad spectral bandwidth, and low spatial coherence for the LIPSS generation, as well as the characterization of this WLC are additional important objectives of this work. Contents Introduction to Laser Induced Periodic Surface Structures (LIPSS) Introduction to White-Light Continuum Generation Characterization of White-Light Supercontinuum Self-Organized Pattern Formation with Ultrafast White-Light Target Groups Lecturers, researchers and students in the fields of Material Science, Microsystems, Engineering The Author Sebastian Uhlig studied physics at Brandenburg University of Technology Cottbus-Senftenberg and wrote his Master Thesis at the Chair of Experimental Physics II, under the supervision of Prof. Dr. Jürgen Reif. Currently, he is employed at the Fraunhofer Institute for Photonic Microsystems in Dresden, where he works on integrated sensors for a new class of electrostatic actuators.
Continuum physics.
Lasers.
Photonics.
Classical and Continuum Physics.
Optics, Lasers, Photonics, Optical Devices.