We examine the formation of the two-dimensional electron gas (2-DEG) at the n-type interface of two band insulators LaAlO3 (LAO) and SrTiO3 (STO) by increasing the thickness of the LAO layers in the framework of the density functional theory (DFT). It has been shown that a metal-insulator phase transition occurs in the 2-DEG when the LAO layers reach to a critical thickness dc = 4 monolayers. T...

We derive semi classical approximations to quantum transport models in thin slabs with applications to SOI (Silicon Oxide on Insulator) type semiconductor devices via a sub band approach. In the regime considered the forces acting on the particles across the slab are much larger than the forces in the lateral direction of the slab. In a semi classical limit the transport picture can be describe...

Abstract— We propose a design method for IIR low-pass differentiators under a specified maximum pole radius constraint. In the proposed method, we express the design problem in a quadratic form with respect to the coefficients of the transfer function. Since the cost function includes a weighting function, the frequency-weighting can be specified in the pass-band. Also, a linear phase property ...

This paper presents the design of a compact integrated UWB-UHF RFID solution enabling simultaneous wireless data and power transfer. The described integrated dual-band antenna is designed to cover the lower European UWB 3.1 to 4.8 GHz band for communication and localization functions and the European UHF RFID 868 MHz band for RF Energy Harvesting. Simultaneous operations are guaranteed by means...

The functioning of carotenoids in photosynthesis is discussed in relation to the reaction mechanism. The energy transfer process from the allenic carotenoid, fucoxanthin, to chl a was intensively investigated in the newly isolated fucoxanthin-chl a / c protein assembly (FCPA) from a brown alga Dictyota dichotoma. The transfer time was shorter than 3 ps at 15°C. The energy level responsible for ...

Defect radiation has been always considered as the most important loss for an emitter based on band gap emission. Here, we propose a novel approach which goes against this conventional wisdom. Based on the resonance effect between the surface plasmon of metal nanoparticles and defect emission, it is possible to convert the useless defect radiation to the useful excitonic emission with a giant e...

The propagation of light in nonperiodic quasicrystals is studied by ultrashort pulse interferometry. Samples consist of multilayer dielectric structures of the Fibonacci type and are realized from porous silicon. We observe mode beating and strong pulse stretching in the light transport through these systems, and a strongly suppressed group velocity for frequencies close to a Fibonacci band gap...

Interference in narrow-band PLC (Power Line Communication) is discussed in the paper. In power lines, interference greatly affects the attainable data rate and reliability. Communication rate was measured and evaluated for different media, using various facilities with special narrow-band modems for data communication. The spectrum of signals measured for different interference sources is shown...

Quantum dot-sensitized solar cells (QDSSCs) have emerged as a promising solar architecture for next-generation solar cells. The QDSSCs exhibit a remarkably fast electron transfer from the quantum dot (QD) donor to the TiO 2 acceptor with size quantization properties of QDs that allows for the modulation of band energies to control photoresponse and photoconversion effi ciency of solar cells. To...

Rectus femoris transfer is frequently performed to treat stiff-knee gait in subjects with cerebral palsy. In this surgery, the distal tendon is released from the patella and re-attached to one of several sites, such as the sartorius or the iliotibial band. Surgical outcomes vary, and the mechanisms by which the surgery improves knee motion are unclear. The purpose of this study was to clarify t...