Award Data

In this program, we will develop a breakthrough technology that will enable wafer-scale epitaxial lift-off (ELO) of GaN power device heterostructures from low-dislocation-density bulk GaN substrates. This technology will be used to provide a low-cost vertical junction field effect transistors (VJFETs) with high breakdown voltage (greater than 1,200 V) and high current capability (greater than 100 ...

Software development faces many challenges as high-performance computing (HPC) moves towards exascale: scalability, programmability, performance portability, resilience, and energy efficiency. To tackle these challenges, fundamental shifts in the basic execution models and programming models employed by HPC software are required. In particular, commonly used linear algebra libraries performance s ...

High Performance Computing technology has advanced significantly, and advanced parallel computers are being built, with DOE leadership. Yet, the American engineering and manufacturing industry has not started leveraging parallel computing at a significant level, partly because of the challenging nature of modern simulation software. US competitiveness in manufacturing may suffer due to its ineffe ...

The Department of Energy has spent millions of dollars on the development of numerical software libraries whose use in commercial settings has been limited. However, the cutting edge capabilities offered by these packages could have a substantial commercial impact and value. One of the main reasons for the limited presence of these libraries in commercial settings is their complex delivery sys ...

The continuous push towards higher photon energies and higher imaging resolution has brought current state- of-theart X-ray focusing zone plates to a limit of 20 nm resolution at & lt;10 keV photon energies. Zone plates for focusing with same or better resolution at energies up to 25 keV are necessary for imaging and elemental analyses of multi-element samples, such as nano-composites, biological ...

Improved optical simulations are critical for x-ray synchrotron radiation sources and free electron lasers. Such facilities generate x-ray pulses of extremely high spectral brightness and flux, high repetition rates and small transverse and longitudinal phase-space volumes. The radiation pulses are in many cases limited only by the basic laws of wave optics. The accelerator light source community ...

This project is developing an ultrafast laser system that is optimized to have wide wavelength tuning range and multi-color output for nonlinear optical and spectroscopic microscopies applications. This ultrafast laser system will use nonlinear frequency down conversion and supercontinuum techniques to address the needs.

Industrial and utility applications utilizing dry cooling for condensing process steam are less efficient than their closed-loop cooling counterparts, resulting in higher energy consumption and operating costs. However, dry cooling is a necessary process in areas where cooling water supply is not available due to competing demands for water. The inefficiencies in dry cooling are largely due to ...

Scientists are turning their focus to the Arctic, site of one of the strongest climate change signals. A new generation of technologies is required to function within that harsh environment, chart evolution of its trace gases and provide new kinds of information for models of the atmosphere. Our response tracks how global atmospheric monitoring was launched more than a half century ago; namely, ac ...

The increase in extreme weather events over the past several decades has underscored the need for regional planning strategies that will support future preparedness and mitigate climate change impact on local communities across the United States. While existing climate modeling tools for non-researchers support a conceptual understanding of climate change at the global level, they do not address t ...