Properties of Type-II ZnTe/ZnSe Submonolayer Quantum Dots Studied via Excitonic Aharonov-Bohm Effect and Polarized Optical Spectroscopy

In the fields of solid state lighting and high efficiency solar photovoltaics (PV), a need still exists for a material system that can target the 2.3-2.5eV energy range. The ZnSe/GaAs system is shown to have great potential. The digital alloy approach can be utilized as a well-ordered design alternative to the disordered alloyed systems. The effective band-gap of the ZnSe/GaAs(001) superlattice...

We present the synthesis and characterization of nanocrystalline II-VI semiconductors of mixed composition (CdSe/ZnSe, CdS) grown in fatty acid Langmuir-Schaefer multi-layer templates. The controlled production of i) homogeneous nanocrystalline Cd x Zn 1?x Se alloys and ii) heterogeneous mixtures of diierent pure composition II-VI semiconductors such as CdSe and ZnSe provides, in addition to th...

II-VI compound semiconductors, ZnS, ZnSe, CdS, CdSe, and CdTe, were grown epitaxially on ~111! and ~100! InP and GaAs substrates by excimer laser ablation. All of these films have good crystalline quality ~fully in-plane aligned! and mirror-like surface morphology. It was found that, on ~111!-oriented substrates, CdS and CdSe films were in the hexagonal phase with the c axis perpendicular to th...

Vacuum evaporated crystalline films of Zinc Selenide (ZnSe) have been characterized by using optical spectroscopy (especially transmission and absorption spectra). Thin films of ZnSe have been deposited by vacuum evaporation technique on highly clean glass substrates and their optical properties such as refractive index (n), extinction coefficient (k), and energy band gap have been studied. The...

Abstract We present experimental and numerical investigations of high-energy mid-infrared filamentation with multi-octave-spanning supercontinuum generation (SCG), pumped by a 2.4 μm, 250 fs Cr:ZnSe chirped-pulse laser amplifier. The SCG is demonstrated in both anomalous normal dispersion regimes YAG polycrystalline ZnSe, respectively. formation stable robust single filaments along the visible-...

The luminescence properties of iron-doped ZnSe (Fe2+:ZnSe) single crystals grown via a traveling heater method have been studied photoluminescence (PL). Nine emission bands were identified in the PL spectra Fe2+:ZnSe and their origins also discussed. near-infrared seen at 820 nm 978 can be attributed to formed by background Fe or other impurity-related defect complexes crystals, rather than dop...

Cadmium (Cd)-free photodiodes based on n-type Zinc Selenide/p-type Telluride (n-ZnSe/p-ZnTe) heterojunctions were prepared by Radio Frequency-Magnetron Sputtering (RF-MS) technique, and their detailed optical electrical characterization was performed. Onto an glass substrate, 100 nm gold (Au) thin film deposited Thermal Vacuum Evaporation (TVE) representing the back-contact, followed successive...