Nathan Ray

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  • Title
    Staff Scientist
  • Email
    ray36@llnl.gov
  • Phone
    (925) 423-9907
  • Organization
    Not Available

Research interests

  • Metasurfaces
  • Thin film deposition and dewetting
  • Optical fabrication, grinding, and polishing
  • Mitigation of damage precursors in optical materials
  • Charge transport across barrier layer nanocomposite structures

Current position(s)

Staff scientist

Career path

  • 2021-present: Staff Scientist, Lawrence Livermore National Laboratory.
  • 2018-2021: Postdoctoral Fellow, Lawrence Livermore National Laboratory.

 

Highlights

https://lasers.llnl.gov/news/big-advance-reported-in-metasurfaces-for-antireflective-optics-coatings

https://lasers.llnl.gov/news/researchers-develop-novel-antireflective-metasurface-for-laser-optics

https://lasers.llnl.gov/news/metasurface-laser-printing-could-improve-nif-optics

 

Subject Matter Expertise

metasurfaces, thin film deposition & dewetting, nanoparticle ensembles, etching masks, optical damage mitigation

Ph.D. Materials Engineering, University of Illinois Chicago, 2017

B.S. Physics, University of Texas at San Antonio, 2012

B.S. Mathematics, University of Texas at San Antonio, 2012

Selected publications

  1. Ray, N. J., Yoo, J.-H., Nguyen, H. T., and Feigenbaum, E., “All‐Glass Metasurfaces for Ultra‐Broadband and Large Acceptance Angle Antireflectivity: from Ultraviolet to Mid‐Infrared”, Advanced Optical Materials, 2300137, 2023.
  2. Yoo, J.-H., Ray, N. J., Nguyen, H. T., M. A. Johnson, and Feigenbaum, E., “Laser-Assisted Tailored Patterning of Au Nanoparticles over an Inch-Sized Area: Implications for Large Aperture Meta-optics”, ACS Applied Nano Materials, 5, 7, 10073, 2022.
  3. Ray, N. J., Suratwala, T. I., Menapace, J. A., Wong, L. L., Steele, W. A., Tham, G. C., and Bauman, B., "Modeling the Hydrodynamic Impact on the Tool Influence Function During Hemispherical Subaperture Optical Polishing”, Applied Optics, 61, 5392, 2022.
  4. Ray, N. J., Yoo, J.-H., Nguyen, H. T., and Feigenbaum, E., “Designer Metasurfaces for Antireflective Applications Enabled by Advanced Nanoparticle Technology”, Advanced Optical Materials, 10, 2270037, 2022.
  5. Suratwala, T. I., Menapace, J. A., Tham, G. C., Steele, W. A., Wong, L. L., Ray, N. J., Bauman, B., “Understanding and Reducing Mid-Spatial Frequency Ripples During Hemispherical Subaperture Tool Glass Polishing”, Applied Optics, 61, 3084, 2022.
  6. Ray, N. J., Yoo, J.-H., Nguyen, H. T., and Feigenbaum, E., “Large Aperture and Durable Glass-Engraved Optical Meta-Surfaces Using Nanoparticle Etching Masks: Prospects and Future Directions”, Journal of Physics: Photonics, 3, 3, 032004, 2021.
  7. Browar, A. E. M., Ray, N. J., Matthews, M. J., Shen, N., Guss, G. M., Carlie, N., and Ellis, J. D., “Analysis of Laser Polishing Fused Silica at Elevated Temperatures”, Journal of Applied Physics, 130, 11, 115302, 2021.
  8. Ray, N. J., Yoo, J.-H., Elhadj, S., Nguyen, H. T., Baxamusa, S. H., Johnson, M. A., and Feigenbaum, E., “Tuning Gold Nanoparticle Size with Fixed Interparticle Spacing in Large-Scale Arrays: Implications for Plasmonics and Nanoparticle Etching Masks”, ACS Applied Nano Materials, 4, 3, 2733, 2021.
  9. Suratwala, T. I., Menapace, J. A., Steele, W. A., Wong, L. L., Tham, G. C., Ray, N. J., Bauman, B., Gregory, M., and Hordin, T., “Mechanisms Influencing and Prediction of Tool Influence Function Spots During Hemispherical Sub-Aperture Tool Polishing on Fused Silica”, Applied Optics, 60, 1, 201, 2021.
  10. Feigenbaum, E., Ray, N. J., Yoo, J.-H., Nguyen, H. T., and Elhadj, S., “Coupling Buried Etalon Layers to an Engraved Metasurface for Durable and Large-Aperture Meta-Optics”, Applied Optics, 59, 27, 8136, 2020.
  11. Ray, N. J., Yoo, J.-H., Nguyen, H. T., Johnson, M. A., Elhadj, S., Baxamusa, S. H., and Feigenbaum, E., “Substrate-Engraved Antireflective Nanostructured Surfaces for High-Power Laser Applications”, Optica, 7, 5, 518, 2020.
  12. Suratwala, T. I., Steele, W. A., Shen, N., Ray, N. J., Wong, L. L., Miller, P. E., and Feit, M. D., “Lateral Cracks During Sliding Indentation on Various Optical Materials”, Journal of the American Ceramic Society, 103, 2, 1343, 2019.
  13. Feigenbaum, E., Ray, N. J., and Yoo, J.-H., “Optical Modeling of Random Anti-Reflective Meta-Surfaces for Laser Systems Applications”, Applied Optics, 58, 27, 7558, 2019.
  14. Ray, N. J., Yoo, J.-H., Mckeown, J. T., Elhadj, S., Baxamusa, S. H., Johnson, M. A., Nguyen, H. T., Steele, W. A., Chesser, J. M., Matthews, M. J., and Feigenbaum, E., “Enhanced Tunability of Gold Nanoparticle Size, Spacing, and Shape for Large-Scale Plasmonic Arrays”, ACS Applied Nano Materials, 2, 7, 4395, 2019.
  15. Yoo, J.-H., Nguyen, H. T., Ray, N. J., Johnson, M. A., Steele, W. A., Chesser, J. M., Baxamusa, S. H., Elhadj, S., Mckeown, J. T., Matthews, M. J., and Feigenbaum, E., “Scalable Light-Printing of Substrate-Engraved Free-Form Metasurfaces”, ACS Applied Materials and Interfaces, 11, 25, 22684, 2019.
  16. Suratwala, T. I., Steele, W. A., Wong, L. L., Tham, G. C., Destino, J. F., Miller, P. E., Ray, N. J., Menapace, J. A., Feigenbaum, E., Shen, N., and Feit, M. D., “Subsurface Mechanical Damage Correlations After Grinding of Various Optical Materials”, Optical Engineering, 58, 092604, 2019.
  17. Suratwala, T. I. Steele, W. A., Wong, L. L., Miller, P. E., Feigenbaum, E.; Shen, N.; Ray, N. J. and Feit, M. D. “Towards Predicting Removal Rate and Surface Roughness During Grinding of Optical Materials”, Applied Optics, 58, 2490, 2019.
  18. Ray, N. J. and Karpov, E. G. “A Voltage Bias Effect on Catalytic Activity of Electrically Continuous Pt/TiO2 Nanocomposites”, Advanced Materials Interfaces, 5, 1800089, 2018.
  19. Ray, N.J. and Karpov, E.G. “Hydrogen Oxidation-Mediated Current Discharge in Mesoporous Pt/TiO2 Nanocomposite”, ACS Applied Materials and Interfaces, 8, 46, 32077, 2016.
  20. Ray, N.J., Hashemian, M.A., and Karpov, E.G. “A Stationary Reaction Current Effect in Mesoporous Pt/ZrO2 System Under H2/O2 Environment”, ACS Applied Materials and Interfaces, 7, 27749, 2015.

 

For a full list, see:

https://scholar.google.com/citations?hl=en&user=f-zqzYwAAAAJ&view_op=list_works&sortby=pubdate

 

Patents and Record of Inventions

 

  1. Feigenbaum, E.; Ray, N. J. “Engraving of nano void-dash metasurface into substrate to generate birefringence in the surface layer” ROI IL-13797
  2. Yoo, J.-H.; Feigenbaum, E.; Ray, N. J. “A combined planetary/raster laser beam scanning using real-time feedback as a method for production of large scale nano-particle masks with smoothly changing spatial distribution for engraved metaoptics” ROI IL-13735
  3. Ray, N. J.; Feigenbaum, E.; Yoo, J.-H. “Enhanced Nanostructure Height: Replenishment of Depleting Nanoparticle Etching Mask” ROI IL-13734
  4. Ray, N. J.; Feigenbaum, E. “Spatially varied mechanical loading of spatially-uniform metasurface for patterning optical and mechanical properties” ROI IL-13545
  5. Browar, A. E. M., Guss, G. M., Matthews, M. J., Ray, N. J., and Shen, N., “System and method for radius of curvature modification of optical plates and lenses by irradiation with optical energy”, US20220176495, A1, June 9, 2022
  6. Feigenbaum, E.; Ray, N. J.; Yoo, J.-H. “Repeated metal deposition-dewetting steps to form a nano-particle etching mask producing thicker layer of engraved metasurface”, WO2021231889 A1, 11/18/2021.
  • DDS&T Excellence in Publication Award, Lawrence Livermore National Laboratory, 2021
  • DDS&T Excellence in Publication Award, Lawrence Livermore National Laboratory, 2020