OBJECTIVE to identify the association between the exposure of workers to inorganic dust in a quarry and a cement factory and pulmonary diseases. METHODS a transverse study on data from 32 quarry workers (QWs) and 57 cement production line workers (CFWs) to inorganic-dust exposure was performed. Pulmonary function tests and chest X ray were done in both groups. RESULTS there were differences...

Exciton localization in ZnO /MgxZn1−xO quantum wells QWs has been investigated systematically with various ZnO well widths for the fixed Mg0.23Zn0.77O barrier height. A strong exciton confinement is observed with an implicit dependence on the built-in electric field which is calculated to be 0.37 MV/cm. The exciton-phonon coupling strength varied significantly depending upon the degrees of exci...

We propose and demonstrate white-light-generating nonradiative energy transfer (ET) from epitaxial quantum wells (QWs) to colloidal quantum dots (QDs) in their close proximity. This proof-of-concept hybrid colorconverting system consists of chemically synthesized red-emitting CdSe/ZnS core/shell heteronanocrystals intimately integrated on epitaxially grown cyanemitting InGaN/GaN QWs. The white ...

We develop a microscopic theory of the fine structure Dirac states in $(0lh)$-grown HgTe/CdHgTe quantum wells (QWs), where $l$ and $h$ are Miller indices. It is shown that bulk, interface, inversion asymmetry causes anticrossing levels even at zero in-plane wave vector lifts state degeneracy. In QWs critical thickness, two-fold degenerate cone gets split into non-degenerate Weyl cones. The spli...

We demonstrate the interplay between quantum well states in Pd and the magnetic anisotropy in Pd/Co/Cu (0 0 1) by combined scanning tunneling spectroscopy (STS) and magneto optical Kerr effect (MOKE) measurements. Low temperature scanning tunneling spectroscopy reveals occupied and unoccupied quantum well states (QWS) in atomically flat Pd films on Co/Cu (0 0 1). These states give rise to sharp...

The selective growth of sub-micrometer sized GaN stripes running along a-direction on c-oriented GaN templates results in semipolar quantum wells (QWs) grown on the {101̄1} side facets that can be embedded easily. Therefore we achieve light emitting devices with semipolar quantum wells on large areas with flat surfaces for easy processing. The influence of the growth mask is thoroughly investiga...

We have used time resolved spectroscopy to measure the relaxation of spin polarization in InSb/AlInSb quantum wells (QWs) as a function of temperature and mobility. The results are consistent with the D’yakonov–Perel (DP) mechanism for high mobility samples over the temperature range from 50 to 300 K. For low mobility samples at high temperature the Elliott–Yafet and DP mechanisms become compar...

We study space-inhomogeneous quantum walks (QWs) on the integer lattice which we assign three different coin matrices to positive part, negative and origin, respectively. call them two-phase QWs with one defect. They cover one-defect QWs, have been intensively researched. Localization is of most characteristic properties various types defect exhibit localization. Moreover, existence eigenvalues...

We propose and demonstrate an infrared (IR) absorption spectrometer, made with a spatially variable photonic bandgap (PBG) structure, a blackbody source, and a simple IR detector, to identify the IR molecular fingerprints of analyte molecules. The PBG-based structure consists of thermally evaporated, IR transparent, high-refractive-index chalcogenide quarter-wave stacks (QWS) with a cavity laye...

A particular family of timeand space-dependent discrete-time quantum walks (QWs) is considered in onedimensional physical space. The continuous limit of these walks is defined through a procedure discussed here and computed in full detail. In this limit, the walks coincide with the propagation of a massless Dirac fermion in an arbitrary gravitational field. A QW mimicking the radial propagation...