Welcome to LLE

The Laboratory for Laser Energetics (LLE) of the University of Rochester is a unique national resource for research and education in science and technology. LLE was established in 1970 as a center for the investigation of the interaction of intense radiation with matter. The National Nuclear Security Administration funds LLE as part of its Stockpile Stewardship Program.

Target being shot by a laser
Office of the Director

Laser's 50th Anniversary

SPIE interview with LLE Director
Dr. Robert L. McCrory

Road Construction Near LLE

Construction on I-390 and I-590 near the lab continues (shown in orange here). Updates available from the NYS Department of Transportation Road Construction Near LLE

Quick Shot

OMEGA Linear Motor Upgrade

After nearly 20 years of reliable service, the linear motor used to remove the shroud on cryogenic target shots is being replaced and installation is scheduled for December. The new design, led by Mechanical Engineer Cody-Shane Taylor, benefits from operational experience gained with the original motor design. It incorporates new features, including: dual position sensors to mitigate control faults during high-yield shots, an integrated load-cell for precision force sensing, a high-precision modular design that can be readily serviced in situ, personnel safety features, and use of commercial off-the-shelf motor and linear bearing hardware. The Cryogenic Target Handling System team (left to right) consists of Jeff Ulreich, Chad Abbott, Mike Bradley, Jeff Kunzel, CodyShane Taylor, Dave Lonobile, Doug Jacobs-Perkins, Brian Rice, and Milt Shoup.

Past Quick Shots

Around the Lab

Computational Chemistry Modeling and Design of Photoswitchable Alignment Materials for Optically Addressable Liquid Crystal Devices

Photoalignment technology, based on optically switchable "command surfaces," has been receiving increasing interest for liquid crystal optics and photonics device applications. Azobenzene compounds in the form of low-molar-mass, water-soluble salts deposited either directly on the substrate surface or after dispersion in a polymer binder have been almost exclusively employed for these applications. Ongoing research in the area follows a largely empirical materials design and development approach. This process is time consuming, labor intensive, and wasteful of costly, and potentially scarce, materials resources because of the need to synthesize a large number of compounds to establish trends in physical properties.

Here, Emily Sekera (B.S. Chemistry, Rochester Institute of Technology 2015) and Research Chemist, Kenneth Marshall, are shown in front of a computationally generated molecular model of an azobenzene photoswitchable alignment material being investigated for use in an optically addressable liquid crystal beam shaper.