On the Electron Mobility in Quasi-One-Dimensional Structures Fabricated by Holographic Lithography and Wet Chemical Etching

Abstract

Propagation and stability of light pulses under the combined influence of the optical Kerr ellect, dispersion and diffraction are investigated by adopting a variational procedure. In particular, it is found thrt 'light bullets', i.e. radially symmetric pulses propagating without distortion, are not necessarily unstable under perturbations which do not maintain radial symmetry.

Enhanced electron mobility in novel side-gated quantum wire structures

“…This effect has been attributed to fluctuations of the confinement potential as well as impurities located in the centre of the quantum wire [5]. Recently an enhanced electron temperature has been measured in photoluminescence experiments carried out in wet chemically etched GaAs/AlGaAs quantum well wire structures [6]. These results have been attributed to an enhancement of the 1DEG mobility.…”

An optical method for studying carrier diffusion in strained (InP)2/(GaP)2 quantum wires

“…8 Thus, a study of the anisotropy of carrier transport in SILO QWRs is also essential in enhancing our understanding of the microstructure and electronic properties of phase-separated materials. [9][10][11][12][13] In this letter, we utilize a new combination of timeresolved cathodoluminescence ͑CL͒ and noncontact Haynes-Shockley diffusion measurements to investigate the carrier diffusion in the ͗110͘ lateral directions with a mask method. 14,15 This method involves patterning samples with a thin metallic mask that allows for penetration of the scanning electron probe but restricts the collection of luminescence emitted from carrier recombination.…”