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

Palladium Tritide Bed

The palladium (Pd) tritide bed is used to receive tritium from a uranium storage bed or a gas vessel and then compress the gas into a cavity, such as a target, at an elevated pressure without the need to heat the palladium above 200°C. The green tubular vessel is part of an acoustically driven Stirling-cycle cryocooler used to thermally cycle the Pd bed from 150 K to 200°C. These Pd beds are deployed in the Hydrogen Isotope Separation System and the Cryogenic Fill-Tube-Target Test Facility. Walter Shmayda is the principal architect and the cooling scheme was designed by Bob Earley. (Although it is displayed horizontally, it will only be used in a vertical orientation.)

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.