Professor, b. 1954 B. Sc. Chem., University of Utrecht, 1976 M. Sc. Chem., University of Utrecht, 1977 Ph.D., Physics, University of Utrecht, 1980

In our group we are interested in the interaction between lasers and optical materials, primarily glass. In recent years our research has focused on the use of laser and optical techniques to create and characterize micro- and nanostructured materials. This is accomplished by exploiting laser-matter interactions that are confined to very small ((sub) micron-size) regions and/or very short (femtosecond) time scales. Under these conditions the laser intensity in the focus becomes very high and this results in permanent modification of the material.

Luke B. Fletcher, Jon J. Witcher, Neil Troy, Signo T. Reis, Richard K. Brow, and Denise M. Krol, “Effects of rare-earth doping on femtosecond laser waveguide writing in zinc polyphosphate glass”, J. Appl. Phys. 112, 023109 (2012). Pavel Mardilovich, Denise M. Lrol, Subhash H. Risbud, “Micron size optically altered regions and nanocrystal formation in femtosecond laser processed CdSxSe1-x doped silicate glass”, Optical Materials 34, 1767 (2012). Neil Troy, Luke B. Fletcher, Signo T. Reis, Richard K. Brow, Huan Huang, Lihmei Yang, Jian Liu, Denise M. Krol, “Structural modification in Er-Yb doped zinc phosphate glasses with megahertz repetition rate femtosecond pulses”, Proc. of SPIE Vol. 8247, 82470U (2012). D. M. Krol, “Spectroscopic Characterization of Waveguides” in “Femtosecond laser micromachining: photonic and microfluidic devices in transparent materials” (Springer Series, Topics in Applied Physics, Vol. 123, Eds. R. Osellame, G. Cerullo, R. Ramponi, 2012). Luke B. Fletcher, Jon J. Witcher, Neil Troy, Signo T. Reis, Richard K. Brow, and Denise M. Krol, “Single-pass waveguide amplifiers in Er-Yb doped zinc polyphosphate glass fabricated with femtosecond laser pulses”, Opt. Lett. 37, 1148 (2012). Luke B. Fletcher, Jonathan J. Witcher, Neil Troy, Signo T. Reis, Richard K. Brow, Rebeca Martinez Vazquez, Roberto Osellame and Denise M. Krol “Femtosecond laser writing of waveguides in zinc phosphate glasses [Invited]”, Opt. Materials. Express 1, 845 (2011). Hao Zhang, D. van Oosten, D. M. Krol, and J. I. Dijkhuis, “Saturation effects in femtosecond laser ablation of silicon-on-insulator”, Appl. Phys. Lett. 99, 231108 (2011). Luke B. Fletcher, Jon J. Witcher, Neil Troy, Signo T. Reis, Richard K. Brow, and Denise M. Krol, “Direct femtosecond laser waveguide writing inside zinc phosphate glass”, Optics Express 19, 7929 (2011). Pavel Mardilovich, Luke Fletcher, Neil Troy, Lihmei Yang, Huan Huang, Subhash Risbud and Denise M. Krol (2011). Ultrafast Laser Processing of Hybrid Micro- and Nano-structures in Silicate Glasses. MRS Online Proceedings Library, 1365, mrss11-1365-tt02-06 doi:10.1557/opl.2011.887