Efficiency at maximum power (EMP) is a very important specification for heat engine to evaluate the capacity of outputting adequate with high efficiency. It has been proved theoretically that limit EMP thermoelectric can be achieved hypothetical boxcar-shaped electron transmission, which realized here by resonant tunneling in one-dimensional symmetric InP/InSe superlattice. found transfer matri...

Recent reports have highlighted the potential importance of intersubband transitions between the two lowest conduction subbands ( C 1, C 2) of a semiconductor superlatdce (SL) in optoelectronic applications. ! -3 Two factors are of key significance: intersubband transitions are spectrally tunable and exceptionally strong. The VB (valence band) -C 1 band gap and the C 1 -> C 2 subband gap are de...

The in-plane and cross-plane thermal conductivities of the cladding layers and active quantum wells of interband cascade lasers and type-II superlattice infrared detector are measured by the 2-wire 3ω method. The layers investigated include InAs/AlSb superlattice cladding layers, InAs/GaInSb/InAs/AlSb W-active quantum wells, an InAs/GaSb superlattice absorber, an InAs/GaSb/AlSb M-structure, and...

This thesis involves an extensive experimental and theoretical study of the thermoelectric-related transport properties of Bii_2Sb. nanowires, and presents a theoretical framework for predicting the electrical properties of superlattice nanowires. A template-assisted fabrication scheme is employed to synthesize Bi-based nanowires by pressure injecting liquid metal alloys into the hexagonally pa...

We show that, if graphene is subjected to the potential from an external superlattice, a band gap develops at the Dirac point provided the superlattice potential has broken inversion symmetry. As numerical example, we calculate the band structure of graphene in the presence of an external potential due to periodically patterned gates arranged in a triangular graphene superlattice TGS or a squar...

= {This paper presents a calibration method of PAR Quantum Sensor. In theory PAR quantum sensor can be precise calibrated by spectroradiometers. The spectroradiometers were calibrated against standard lamps traceable to the National Standards. This method is validated by experiment. There are some conflicting views in different version specification on quantum sensor Li-cor. The is not any word...

Strained-superlattice photocathodes based on InGaP/GaAs were investigated. The photocathode performance is found highly dependent on the superlattice parameters. The electron confinement energy in superlattice appears important.

The demand for new materials to be used in field-effect transistors and similar devices with low energy loss is more than ever before as integrated circuits have become a considerable source of energy consumption. One of the challenges in designing such energy efficient logic devices is finding suitable dielectric materials systems for the gate that controls the drain current in a p-type channe...

A detailed theory of nonisothermal electron transport perpendicular to multilayer superlattice structures is presented. The current–voltage (I – V) characteristics and the cooling power density are calculated using Fermi–Dirac statistics, density-of-states for a finite quantum well and the quantum mechanical reflection coefficient. The resulting equations are valid in a wide range of temperatur...