Inverse design/ analytic model of photonic devices

• R. Mashiko, J. Lee, F. Alhosani, C. G. Valdez, D. A. B. Miller, and O. Solgaard, “Analytic model for broadband curved directional couplers,” Optica Open (2026). [Preprint]

• R. Mashiko, J. Lee, F. Alhosani, C. G. Valdez, D. A. B. Miller, and O. Solgaard, "Broadband curved directional couplers based on semi-analytic model," Optica Advanced Photonics Congress, Long Beach, USA (2026).
   

Programmable photonics

• E. Bendek, R. Belikov, S. A. Bongarz, R. Mashiko, C. Valdez, J. Lee, J. Lin, R. Morgan, D. Sirbu, N. Dostart, O. Solgaard, D. A. B. Miller, and J. Hagopian, “Coupling free space light into the AstroPIC photonic coronagraph,” Proc. SPIE 14145, Space Telescopes and Instrumentation 2026: Optical, Infrared, and Millimeter Wave, 141457D (2026).
   

Free-space optics

• ​Optical interconnect
  • J. Lee, R. Mashiko and O. Solgaard, “Optical Interconnects for Energy-efficient Data Centers,” Stanford Sustainability Hackathon (2026). [1st Place, $100,000]

• Optical AI accelerators

  • R. Mashiko, M. Naruse, and R. Horisaki, “Diffraction casting,” Advanced Photonics 6(5), 056005 (2024). [Featured by several media]
     

  • R. Mashiko, M. Naruse, and R. Horisaki, “Optical SIMD logic gates utilizing parallelism,” Frontiers in Optics + Laser Science, FM5B-4, Denver, USA (2024).

  • R. Mashiko, R. Horisaki, and M. Naruse, “Diffraction Casting: A novel optical computation paradigm utilizing spatial parallelism,” Optics and Photonics Japan, Sapporo, Japan (2023). [Best Presentation Award]

• Computational imaging​

  • R. Mashiko, J. Tanida, M. Naruse, and R. Horisaki, “Extrapolated speckle-correlation imaging with an untrained deep neural network,” Applied Optics 62(31), 8327 (2023).