Publications

The localization and relaxation kinetics of the optically excited electron are probed as a function of the chemical nature and rigidity of the solvent.

We report picosecond transient optical absorption decays for electrons localized in F-center analogues in molten KCl and KBr.

Time resolved absorption spectroscopy as well as transient grating measurements were performed on polydiacetylene-pTs.

This manuscript is part of a continuing program to develop spectroscopic techniques for fast, real-time analysis of chemical reactions in liquids, and at condensed phase interfaces.

Single and multiple quantum well laser diodes operating at 1.5micron are fabricated incorporating an intracavity electroabsorptive loss modulator.

SUMMARY: We report the first results of the high speed response of InGaAs/InP single- and multiple quantum well laser diodes (lambda = 1.5microns) which incorporate a small intracavity modulator s

Electron transfer is recognized as an important means for initiating many biological and chemical reactions.

From picosecond pump-probe and forward degenerate four-wave mixing (DFWM) experiments, we obtain the near-band-gap nonlinear absorption and refraction properties of GaInAsP for 1.5micron radiation.

Surface electrons were selectively photoexcited into the normally unoccupied antibonding surface state on the cleaved Si(111)2x1 surface using 2.8microns infrared laser radiation.

We report the first use of angle resolved ultraviolet photoemission spectroscopy to study electron dynamics in the picosecond time domain on a photoexcited semiconductor surface.