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The first Optical Society of America (OSA) Topical Meeting on
Picosec ond Phenomena, held at Hilton Head, South Carolina, in
1978, brought together in a congenial setting an interdisciplinary
group of laser engineers and physicists who were exploring the
emerging technologies for generat ing and applying picosecond
optical pulses, together with scientists from the fields of
chemistry, physics, biology, and electronics who saw in those
pulses capabilities for studying atomic and molecular phenomena on
time scales previously unrealizable. The technology in this field
has since developed even more rapidly and remarkably than foreseen
eight years ago, and the applications to science and technology, in
physics, chemistry, biology, electronics, and commu nications, have
proven to be equally extraordinary. Optical pulses with pulse
widths shorter than 10 femtosecond - only a few optical cycles in
du ration - along with mono cycle infrared pulses, complex
nonlinear optical solitons, electrooptic techniques with
subpicosecond time resolutions, and a full toolkit of measurement
and detection techniques have now emerged, including new methods
for making ultrafast measurements in some cases even without
ultrafast optical pulses. These tools are now being widely applied
to study the internal motions of complex molecules and atomic lat
tices, the relaxation times of superheated electrons in solids, the
ultrafast dynamics of chemical reactions, the excited-state
lifetimes of photosyn thetic and visual pigments, and the response
times of the fastest electronic circuits yet developed.
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