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Rohana K. Garuthara

Professor Emeritus of Physics and Astronomy


PHD, 1986, CUNY Gr Sch & Univ Cnt; BS, 1972, Univ Ceylon


My research in the Laser Physics Laboratory focuses on understanding optical properties of semiconductor thin films and electronic properties at the interface of semiconductor/electrolyte junctions. My research involves fabrications of semiconductor thin films, nanostructures, and liquid junction solar cells. The laboratory is equipped with photoluminescence, photoreflectance, and absorption spectroscopy systems to measure optical properties of thin films, nanostructures, and solar cell photoanodes.

Teaching Experience

Hofstra University

  • Professor (2006-present)
  • Associate Professor (1996-2006)
  • Assistant professor (1990-1996)                               


Guest Research Scientist, National Institute of Standards and Technology; 1997-


“Opto-Electronic Trigger Pulse Device for a Streak Camera” Granted to R. R. Alfano and R. Garuthara U.S. Patent No. 5,003,168


Photoluminescence characterization of polycrystalline  n-type Cu2O films” Rohana Garuthara and Withana Sripala; Journal of Luminescence 121, 173, 2006.

“Characterization of CuInS2 thin films prepared by electrodeposition and sulfurization with photoluminescence spectroscopy” Rohana Garuthara, Ruwan Wijesundra, Withana Siripala; Solar Energy Materials & Solar Cells 79, 331 2003.

“Electronic Band Gap States in Electrodeposited Cuprous Oxide Semiconductor”; R. Wijesundra, N.K. A. Kodiweera, W. Siripala, and R Garuthara; Proceedings of the Technical Sessions, Institute of Physics Sri Lanka , 20, 75-80 2004.

“Photoluminescence of chemically deposited CdSe nanocrystallites: Effects of crystallite polydispersity” Rohana Garuthara and Gregory Levine; J Appl. Phys. 80 (1), 401, 1996

Research Students

Amanda Lesar   2014                      
Endri Mani          2013       Columbia University; Ph.D. Applied Math program
Jackson Halpin  2013       Brandeis University; Ph.D. Biophysics
Waqqas Khan    2012       Stanford University; Ph.D. Aeronautical Engineering
David Miller       2008       Princeton University; Ph.D. Engineering (2014); Postdoc Brown University

Recent Courses Taught

Course Title Level
PHYS 001B (NS) ELEM PHYSICS LAB Undergraduate
PHYS 011A (NS) GENERAL PHYSICS Undergraduate
Photo of Rohana Garuthara

Chemistry Physics Bldg. 102
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