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Optoelectronic devices based on single, self-assembled semiconductor quantum dots are attractive for applications in secure optical communications, quantum computation and sensing. In this paper we show how it is possible to dictate the nucleation site of individual InAs/InP quantum dots using a directed self-assembly process, to control the electronic structure of the nucleated dots and also how...
The interfacial failure behavior of a single solder joint is investigated under the pure tensile or shear loading at 5 mm/s. The brittel failure is detected for the specimen under pure tension loading, while a ductile failure is found after pure shear loading. A cohesive zone model is employed herein to explore the dynamic fracture behavior at the solder/IMC and IMC/Cu pad interfaces. The simulated...
We investigate the growth of positioned InAs/InP quantum dots for incorporation into InP-based photonic crystal microcavities. The optical properties of these quantum dots and the photonic crystal microcavities are described, as well as the effect of a lateral electric field on biexciton binding energy. This system is proposed as a scalable route to single and entangled photon pair sources at telecommunications...
We propose a scalable route to single and entangled photon pair sources at telecoms wavelengths based on single InAs/InP quantum dots embedded within photonic crystal microcavities. The electrostatic gating of such dots is discussed.
The second harmonic radiation emitted into the top half space from three dimensionally localized modes of L3 defect cavities in InP-based planar photonic crystals is studied using both CW and pulsed excitation. The far field harmonic radiation patterns observed from modes with resonant wavelengths ~ 1550 nm, excited by a tunable CW laser with less than 1 mW power, reveal strong local field enhancement...
This paper presents derivation of a trajectory tracking and stair climbing stabilization controller for a 4-wheel driven skid-steered wheeled mobile robot (SSWR). The robot vehicle is modeled with six degrees of freedom (6DOF) rigid body equations which are later simplified for planar and pitched movement. An efficient control algorithm, called trajectory linearization control (TLC), is used to tackle...
In this paper, an integrated navigation and control for omni-directional mobile robot is developed. Both control and navigation algorithms are based on trajectory linearization. The robot control is based on trajectory linearization control (TLC), in which an open-loop kinematic inversion and a closed-loop linear time varying (LTV) stabilizer are combined together to provide robust and accurate trajectory...
Summary form only given. Experiments are underway in our lab to study the interactions of low energy (5 to 50 keV) electrons that are injected transverse to laser excited plasma waves. Such plasma waves have been used by other researchers to accelerate electrons to high energies over short distances, when the electrons are injected collinearly. Transverse injection has been proposed as a way to diagnose...
We demonstrate highly efficient evanescent coupling via a silica loop-nanowire, to ultra-small quantum-dot photonic-crystal cavities. It enables the tuning of both the O utilde-factor and the wavelength of the cavity mode independently.
Sum frequency data are reported from the nonlinear interaction of two coherently excited resonant modes of a two-dimensional planar photonic crystal microcavity patterned in a free-standing InP slab.
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