Aaswath Raman


Professor Aaswath Raman
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Assistant Professor; Assistant Professor, University of Pennsylvania (2018); Co-Founder, Chief Scientists, SkyCool Systems (2017); Research Associate, Stanford University (2013-2016); Ph.D. in Applied Physics, Stanford University (2013); M.S. in Computer Science, Harvard University (2006); A.B. in Physics and Astronomy and Astrophysics, Harvard University (2006).

Research Interests

Dr. Raman’s research explores how light and heat can be controlled at the nanoscale to enable new technological possibilities for cleaner energy, information processing, sensing, displays and communication systems. His research group’s interdisciplinary interests include metamaterials, nanophotonics, photonic materials, plasmonics and new computational and machine learning methods. A highlight of his recent work has been initiating an emerging field of research, and a new approach to energy efficiency and generation, known as radiative cooling. Using nanoscale photonic materials, his research has explored how to harness a ubiquitous and renewable source of energy that remains largely unexploited: the cold of the universe.

Dr. Raman’s group has openings for postdocs and graduate (M.S./Ph.D.) students, as well as undergraduates. Students with backgrounds in Optics & Photonics, Physics, Electrical Engineering, Materials Science and Engineering, Mechanical Engineering and related fields may send their CV and a short statement of interest to 


Area of Thesis Guidance

Metamaterials, Optical and Photonic Materials, Nanophotonics, Plasmonics, Thermal Sciences, Energy Systems, Computational Methods

Selected Honors

  • TED 2018 Invited Speaker (2018)
  • MIT Technology Review’s Innovators Under 35 (TR35) (2015)
  • Stanford University Postdoctoral Research Award (2013)
  • Sir James Lougheed Award of Distinction (2011)
  • SPIE Green Photonics Award (2011)


Selected Publications

  1. Shanhui Fan and Aaswath Raman, “Metamaterials for radiative sky cooling”, National Science Review (2018) *Invited Review Paper
  2. Eli Goldstein, Aaswath Raman* and Shanhui Fan*, “Sub-ambient non-evaporative fluid cooling with the sky”, Nature Energy, 2, 9 (2017).
  3. Alexander Cerjan, Aaswath Raman and Shanhui Fan, “Exceptional contours and band structure design in parity-time symmetric photonic crystals”,Physical Review Letters, 116, 203902 (2016).
  4. Linxiao Zhu*, Aaswath Raman* and Shanhui Fan, “Radiative cooling of solar absorbers using a visibly-transparent photonic crystal thermal blackbody”, Proceedings of the National Academy of Sciences (2015).
  5. Aaswath Raman, Marc Abou Anoma, Linxiao Zhu, Eden Rephaeli and Shanhui Fan, “Passive Radiative Cooling below Ambient Air Temperature under Direct Sunlight”, Nature, 515, 540-544  (2014).
  6. Aaswath Raman, Wonseok Shin and Shanhui Fan, “Upper bound on the modal material loss rate in plasmonic and metamaterial systems”, Physical Review Letters, 110, 183901 (2013).
  7. Aaswath Raman and Shanhui Fan, “Photonic band structure of dispersive metamaterials formulated as a Hermitian eigenvalue problem”, Physical Review Letters, 104, 087401 (2010).



Research group website: http://www.aaswathraman.com

Google scholar profile: https://scholar.google.com/citations?user=GWGNxDQAAAAJ