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.
Picosecond time resolved Raman spectroscopy is a newly developed technique in chemical kinetics.
We report the first picosecond time resolved Raman spectra of myoglobin (Mb) generated with Soret excitation.
We report the first picosecond time resolved Raman spectra of hemoglobin (Hb) generated with blue picosecond pulses (20- 30 ps) that are both resonant with the Soret band and of sufficient intensi
We report direct measurements of drift velocities of photoexcited minority electrons in p-doped quantum well structures of GaAs/Al (0.48)Ga(0.52)As, using picosecond time-of-flight techniques.
An apparatus to probe picosecond photoinduced absorption in semiconductors between 2 microns and 5 microns with picosecond resolution is described.
Low concentrations of electrons in molten alkali halides form localized states similar to F-centers.
An apparatus is described which generates very sensitive picosecond transient Raman spectra with 5 ps time resolution.
In early work in picture coding, Graham stressed the role of the viewer and Powers and Staras concluded t h a t if large reductions in bit-rate are to be achieved they must come from "nonstatistica
