Erratum: “Nonlinear optical response of GaN layers on sapphire: The impact of fundamental beam interference” [Appl. Phys. Lett. 76, 810 (2000)]

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/70473/2/APPLAB-76-11-1479-1.pd

Double-resonant second harmonic generation from surface coverages of Nile Blue A

Second harmonic emission from a dye covered quartz surface was obsd. in total internal reflection. Coverages with the dye Nile Blue A yielded an increase in 2nd harmonic output by several orders of magnitude as compared to coverages with Rhodamine 6G. In the latter case, only the harmonic light is at resonance with the S0-S2 transition of the adsorbed dye mols., whereas for Nile Blue A both, the fundamental and the harmonic frequency, are at resonances with the resp. singlet transitions

Planar waveguides and other confined geometries: theory, technology, production, and novel applications

This book provides a comprehensive overview of the theoretical concepts and experimental applications of planar waveguides and other confined geometries, such as optical fibres. Covering a broad array of advanced topics, it begins with a sophisticated discussion of planar waveguide theory, and covers subjects including efficient production of planar waveguides, materials selection, nonlinear effects, and applications including species analytics down to single-molecule identification, and thermo-optical switching using planar waveguides. Written by specialists in the techniques and applications covered, this book will be a useful resource for advanced graduate students and researchers studying planar waveguides and optical fibers

Excimer Laser Technology

This comprehensive survey on Excimer Lasers investigates the current range of the technology, applications and devices of this commonly used laser source, as well as the future of new technologies, such as F2 laser technology. Additional chapters on optics, devices and laser systems complete this compact handbook. A must read for laser technology students, process application researchers, engineers or anyone interested in excimer laser technology. An effective and understandable introduction to the current and future status of excimer laser technology

Single pulse femtosecond laser ablation of silicon – a comparison between experimental and simulated two-dimensional ablation profiles

Abstract Ultrashort laser pulses are widely used for the precise structuring of semiconductors like silicon (Si). We present here, for the first time, a comparative study of experimentally obtained and numerically simulated two-dimensional ablation profiles based on parameters of commercially relevant and widely used near-infrared and diode pumped femtosecond lasers. Single pulse laser ablation was studied at a center wavelength of 1040 nm and pulse duration of 380 fs (FWHM) in an irradiating fluence regime from 1 J/cm2 to 10 J/cm2. Process thresholds for material transport and removal were determined. Three regimes, scaling with the fluence, could be identified: low and middle fluence regimes and a hydrodynamic motion regime. By comparing the simulated and experimental ablation profiles, two conclusions can be drawn: At 2 J/cm2, the isothermal profile of 3800 K is in excellent agreement with the observed two-dimensional ablation. Thus exceeding a temperature of 3800 K can be accepted as a simplified ablation condition at that fluence. Furthermore, we observed a distinct deviation of the experimental from the simulated ablation profiles for irradiated fluences above 4 J/cm2. This points to hydrodynamic motion as an important contributing mechanism for laser ablation at higher fluences.</jats:p