Semiconductors with chiral geometries at the nanoscale and mesoscale provide a rich materials platform for polarization optics, photocatalysis, and biomimetics. Unlike metallic and organic optical materials, the relationship between the geometry of chiral semiconductors and their chiroptical properties remains, however, vague. Homochiral ensembles of semiconductor helices with defined geometrie...

Metallic films with subwavelength apertures, integrated into a semiconductor by metal-assisted chemical etch (MacEtch), demonstrate enhanced transmission when compared to bare semiconductor surfaces. The resulting "buried" metallic structures are characterized spectroscopically and modeled using rigorous coupled wave analysis. These composite materials offer potential integration with optoelect...

School of Semiconductor and Chemical Engineering, Semiconductor Physics Research Center (SPRC), Chonbuk National University, Jeonju 561-756, Korea Measurement and Analysis Division, National Nanofab Center (NNFC), Daejeon 305-343, Korea Department of Advanced Materials Science and Engineering, Dankook University, Cheongan 330-714, Korea Department of BIN Fusion Technology, Chonbuk National Univ...

Semiconductor substrates made from single crystal materials need to be cut precisely along a fixed axis during the manufacturing process of the semiconductor components. Thus, measuring the crystal orientation is critical. For these measurements, Xray techniques demonstrate the highest precision. This report presents an outline of two popular X-ray diffraction techniques, the diffractometer and...

Submitted for the MAR13 Meeting of The American Physical Society Realization of Negative Capacitance with Topological Insulator Based MOS Capacitor1 HUI YUAN, GMU, KAI ZHANG, ODU, HAO ZHU, HAITAO LI, DIMITRIS IOANNOU, GMU, HELMUT BAUMGART, ODU, CURT RICHTER, NIST, QILIANG LI, GMU, ECE, GEORGE MASON UNIVERSITY TEAM, SEMICONDUCTOR AND DIMENSIONALMETROLOGY DIVISION OF NIST TEAM, ECE, OLD DOMINION ...

Thermal transport plays a crucial role in performance and reliability of semiconductor electronic devices, where heat is mainly carried by phonons. Phonon transport in crystalline semiconductor materials, such as Si, Ge, GaAs, GaN, etc, has been extensively studied over the past two decades. In fact, study of phonon physics in crystalline semiconductor materials in both bulk and nanostructure f...

Grain boundaries (GBs) are structural imperfections that typically degrade the performance of materials. Here we show that dislocations and GBs in two-dimensional (2D) metal dichalcogenides MX2 (M = Mo, W; X = S, Se) can actually improve the material by giving it a qualitatively new physical property: magnetism. The dislocations studied all display a substantial magnetic moment of ∼1 Bohr magne...

An architecture in which nand p-type materials alternate laterally in the active ®lm of a device with a spatial period of about a carrier di€usion length would lead to ecient (opto)electronic devices for photovoltaic energy conversion and switching, among others. Such an architecture, although dicult to achieve with conventional silicon-based schemes, is within reach using semiconductor nanoc...

X-ray computed tomography (CT) is a powerful nondestructive 3D imaging technique, which enables the visualization of the three dimensional internal structure of opaque materials such as semiconductor devices. Reports of high resolution CT research on life science, materials and semiconductor has mainly been confined to synchrotron radiation centers. This severely limits the availability and acc...