WEA02
LANL, Los Alamos, New Mexico, USA
Development of photoemission electron sources for advanced light sources such as X-ray Free Electron Lasers (xFEL), ultra-fast electron diffraction (UED), and low-light sensor applications has motivated a comprehensive engineered-material approach integrating predictive computational physics models, advanced nano-synthesis methods and characterization with in-situ correlated study of photoemission performance and properties [1]. Techniques such as compositionally graded stoichiometry, heterostructured architectures, and quantum features, allowing for enhanced optoelectronic properties [2]. These methods influence the mechanisms of photoemission but have not, until recently, been applied toward photocathode applications [3]. Recent results from a growing collaboration effort involving advanced synthesis, X-ray synchrotron characterization, and modeling efforts show the efficacy of these approaches. Highlights of these studies, including predictions and experimental data, are presented as well as future plans to exploit controlled functionality of nanomaterials for photocathodes and other optoelectronic devices.
[1] N. Moody, K. Jensen et al., Phys. Rev. Appl. 10, 047002 (2018)
[2] A. Shabaev and A. Efros, Nano Lett. 13, 5454 (2013)
[3] M. Gaowei, Z. Ding et al., APL Materials 5, 116104 (2017)
