1999

Introductory Science Lectures: A Missed Opportunity, at Seminar on Covering Teaching and Learning in Higher Education, Hechinger Institute on Education and the Media, Columbia University (New York, NY), Saturday, September 25, 1999:
There is no doubt that since the beginning of this century the United States ranks first in generating outstanding scientists. It is therefore ironic that as a whole, the population of the United States scores low in Science and Mathematics. One only need turn to the media to see that our society does not value science and science education as it did just a few decades ago. In spite of all the advances in science and the many contributions of related technological developments to society, science illiteracy is rampant. The average person has little faith in scientists and there are more... Read more about Introductory Science Lectures: A Missed Opportunity
Femtosecond laser micromachining of bulk glass at oscillator energies, at Gordon Conference on Nonlinear Optics, Colby Sawyer College (New London, NH), Tuesday, July 27, 1999:
Using femtosecond laser pulses generated by a 25-MHz Ti:Sapphire laser oscillator, we micromachine bulk glass. The laser is focused by a 1.4 numerical aperture microscope objective, allowing the breakdown threshold to be reached with modest energies (4.5 nJ). Single-shot damage is sub-micron in size. Because the pulses arrive faster than energy can diffuse out of the focal volume, multiple shot damage with this laser is thermal in nature. Successive pulses add more and more heat to the sample, melting a micron-sized volume. Using this thermal machining, we have written single-mode waveguides... Read more about Femtosecond laser micromachining of bulk glass at oscillator energies

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