Lawrence Livermore National Laboratory

Manyalibo Matthews

Group Leader
Laser Materials Science Group
Materials Science Division

 +1 925-424-6762

Ph.D. Physics
Massachusetts Institute of Technology
B.S. Applied Physics
University of California - Davis

Research Interests

I currently serve as Group Leader of the Laser Materials Science group in MSD. My research interests include laser-matter interaction science, novel applications in laser-assisted material processing and in situ characterization of fast processes. A central focus of my group is currently laser-based, metal additive manufacturing (AM) which involves probing the physics and improving the process of AM for improved performance of metal components. We have developed several R&D platforms to study metal AM, using optical, X-ray, and thermal probes to characterize the laser-matter interactions and dynamics of the process. I currently lead a lab initiative on modulating beam shape and pulse formats of lasers used for metal AM as a means of controlling solidification microstructure and residual stress. Other laser processing activities have included laser-based CVD of optical and ultra-hard materials, nano-coarsening of metal films, and non-contact laser polishing of glass. To improve the optical performance of high power optics, I have led activities focused on understanding optical damage and helped lay the foundational science for laser-based damage mitigation processes. In terms of characterization, I have interests in pump-probe, vibrational spectroscopy, plasma spectroscopy, and ultra-high-speed imaging of transient processes. Prior to LLNL, I was a member of the technical staff at Bell Labs in Murray Hill, NJ and worked on materials characterization of optical devices using novel spectroscopic techniques, stress-induced birefringence management in planar optical devices, and research in advanced broadband access networks.

Selected Publications

  1. M. J. Matthews, G. Guss, S. A. Khairallah, A. M. Rubenchik, P. J. Depond, and W. E. King, “Denudation of metal powder layers in laser powder bed fusion processes,” Acta Materialia 114, 33, 2016.
  2. (Cover Article) C. A. R. Chapman, L. Wang, J. Biener, E. Seker, M. M. Biener, and M. J. Matthews, “Engineering on-chip nanoporous gold material libraries via precision photothermal treatment,” Nanoscale 8, 785, 2016.
  3. (Cover Article) M. J. Matthews, S. T. Yang, N. Shen, S. Elhadj, R. N. Raman, G. Guss, et al., “Micro-Shaping, Polishing, and Damage Repair of Fused Silica Surfaces Using Focused Infrared Laser ┬áBeams,” Advanced Engineering Materials 17, 247, 2015.
  4. M. J. Matthews, N. Shen, J. Honig, J. D. Bude, and A. M. Rubenchik, “Phase modulation and morphological evolution associated with surface-bound particle ablation,” JOSA B 30, 3233, 2013.
  5. M. J. Matthews, G. Petitpas, and S. M. Aceves, “A study of spin isomer conversion kinetics in supercritical fluid hydrogen for cryogenic fuel storage technologies,” Applied Physics Letters 99, 081906, 2011.
  6. M. J. Matthews, J. Hsu, S. Gu, and T. Kuech, “Carrier density imaging of lateral epitaxially overgrown GaN using scanning confocal Raman microscopy,” Applied Physics Letters 79, 3086, 2001.
  7. M. Matthews, M. Pimenta, G. Dresselhaus, M. Dresselhaus, and M. Endo, “Origin of dispersive effects of the Raman D band in carbon materials,” Physical Review B 59, R6585, 1999.

Complete Publications 

Selected Patents

  • J. J. Adams, M. Bolourchi, J. D. Bude, G. M. Guss, J. A. Jarboe, M. J. Matthews, M. C. Nostrand, and P. J. Wegner “System and method for laser-based, non-evaporative repair of damage sites in the surfaces of fused silica optics,” U.S. Patent 9,434,645, issued September 6, 2016.
  • H.K. Chow, M.J. Matthews, D. Suvakovic, and D. Van Veen, “Methods and apparatus for achieving multiple bit rates in passive optical networks,” U.S. Patent 8,712,243, issued April 29, 2014.
  • M.J. Matthews and C. Xu, “Modulation Phase Shift To Compensate For Optical Passband,” U.S. Patent 7,403,718, issued July 22, 2008.
  • M.J. Matthews, “Short haul optical communications,” U.S. Patent 7,212,746, issued May 1, 2007.
  • G.M. Boles, A.E. Dunlop, I. Hadzic, M.J. Matthews, D. Suvakovic, and D. Van Veen, “Clock, Data And Time Recovery Using Bit-Resolved Timing Registers,” U.S. Patent 7,123,675, issued October 17, 2006.
  • G.M. Boles, I. Hadzic, M.J. Matthews, D. Suvakovic, and D. Van Veen, “Method And Apparatus For Multiphase, Fast-Locking Clock And Data Recovery,” U.S. Patent 7,242,739, issued July 10, 2007.

Last update: