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Summary form only given. In recent years, nanoparticles of metals, such as gold, silver, and copper, have attracted much attention because they have electrical and optical properties that are different from those of bulk metals. Electron dynamics and optical nonlinear response of metallic nanoparticles have been studied extensively and suggested that metallic nanoparticles are promising candidates...
Summary form only given. Bloch oscillations (BO) of electrons in a periodic system under applied electric field are a very basic transport effect and have been investigated in several experiments in semiconductor superlattices. In time resolved optical experiments, BO were studied by the excitation of wave packets of Wannier-Stark ladder (WSL) states and detection of four-wave mixing signals, THz...
Summary form only given. We use visible-infrared dual beam time-resolved spectroscopy to study the dynamics of carriers in optically pumped laser devices containing quantum heterostructures within their active layers. By tuning the probe energy through the intersubband absorption resonance, we directly measure the electron population in various momentum states within the first conduction subband of...
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