Sandia Labs FY22 Laboratory Directed Research & Development Annual Report

DEVELOPMENT AND UTILIZATION OF QUANTITATIVE SECONDARY ELECTRON IMAGING FOR THE STUDY OF QUANTUM COMPUTING MATERIALS.

Electronic components are approaching their fundamental limits in terms of energy, speed and size. To be able to predictively design sub 10 nm components, accurate measurements of the thermodynamics of the underlying materials (their terminal states) are needed, and also of the kinetics of the energy carriers that dictate speed and

time, the carrier time constants in InAs. The SUEM tool revealed surprising negative-time kinetics influenced by a combination of surface and vacuum potentials. This cutting-edge technique will speed up manufacturing of electronics via predictively choosing and designing materials

without having to manufacture and measure entire electronic devices. This work generated one paper under publication, and several conference talks sponsored by the Materials Research Society. Due to this work, Chris Perez, a Sandia a year-round intern, graduated with his PhD from Stanford University and was awarded a doctoral fellowship at the Advanced Light Source at Lawrence Berkely National Laboratory. (PI: Suhas Kumar)

energy limits. The scanning ultrafast electron microscope (SUEM) successfully measured picosecond resolved carrier kinetics with an unprecedented combination of spatial, temporal, depth and surface potential information. This Sandia LDRD team worked on optoelectronic materials gallium arsenide and indium arsenide (InA), and measured, for the first

The SUEM measuring a combination of electrical components showing spatial, temporal, depth, and surface potential information.

PHONONIC MEMORY AND OPTICAL TELEPORTATION USING OPTOMECHANICS: HARDWARE ACCELERATORS FOR QUANTUM COMPUTERS. Linking quantum computers via transparent optical networks would enable significant progress in the development of quantum information In this project, the superconducting qubit, piezoelectric transducer, and optomechanical crystal were developed on the same silicon membrane platform. Moreover, the team

systems. This LDRD project investigated transduction of a superconducting qubit microwave photon to a flying optical photon in fiber utilizing a piezoelectric transducer and optomechanical crystal. This approach takes advantage of the individual components; as superconducting qubits excel in computation, optical photons are efficient for long-distance communication, and long-decoherence-time phonons are suitable to serve as an intermediary.

developed a theoretical framework to optimize the control and operation of these components to form quantum networks. The work from this LDRD project was published in npj quantum information , Journal of Physics A, and Physical Review Research, and was developed in collaboration with Sandia Alliance partner University of Texas at Austin. (PI: Matt Eichenfield)

77

LABORATORY DIRECTED RESEARCH & DEVELOPMENT