Sajeev John
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Sajeev John, OC, FRSC (born 1957) is a Professor of Physics at the University of Toronto and Canada Research Chair holder. He received his bachelor's degree in physics in 1979 from the
Massachusetts Institute of Technology The Massachusetts Institute of Technology (MIT) is a private land-grant research university in Cambridge, Massachusetts. Established in 1861, MIT has played a key role in the development of modern technology and science, and is one of the ...
and his Ph.D. in physics at
Harvard University Harvard University is a private Ivy League research university in Cambridge, Massachusetts. Founded in 1636 as Harvard College and named for its first benefactor, the Puritan clergyman John Harvard, it is the oldest institution of high ...
in 1984. His Ph.D. work at Harvard introduced the theory of classical wave localization and, in particular, the localization of light in three-dimensional strongly scattering dielectrics. From 1984–1986 he was a Natural Sciences and Engineering Research Council of Canada postdoctoral fellow at the University of Pennsylvania, as well as a laboratory consultant to the Corporate Research Science Laboratories of Exxon Research and Engineering from 1985-1989. From 1986-1989 he was an assistant professor of physics at
Princeton University Princeton University is a private research university in Princeton, New Jersey. Founded in 1746 in Elizabeth as the College of New Jersey, Princeton is the fourth-oldest institution of higher education in the United States and one of the ...
. In 1987, while at Princeton he co-invented, along with
Eli Yablonovitch Eli Yablonovitch (born 15 December 1946) is an American physicist and engineer who, along with Sajeev John founded the field of photonic crystals in 1987.M.Kapoor (2013Electromagnetic Band Gap Structures page 58 He and his team were the first t ...
, the concept of a new class of materials with a photonic band gap called
photonic crystals A photonic crystal is an optical nanostructure in which the refractive index changes periodically. This affects the propagation of light in the same way that the structure of natural crystals gives rise to X-ray diffraction and that the atomic ...
. This provided a fuller explanation of his original conception (1984) of the localization of light. He was a laboratory consultant to Bell Communications Research (Red Bank, NJ) in 1989. In the fall of 1989 he joined the senior physics faculty at the University of Toronto. He has been a Principal Investigator for Photonics Research Ontario and is a fellow of the Canadian Institute for Advanced Research. Professor John is the winner of the 2001 King Faisal International Prize in Science, which he shared with C. N. Yang. He is also the first ever winner of Canada’s Platinum Medal for Science and Medicine in 2002. Dr. John is the winner of the Institute of Electrical and Electronics Engineers (IEEE) LEOS International Quantum Electronics Award in 2007 for “the invention and development of light-trapping crystals and elucidation of their properties and applications.” He is the 2008 winner of the IEEE
Pioneer Award in Nanotechnology The IEEE Pioneer Award in Nanotechnology is given by the Institute of Electrical and Electronics Engineers IEEE Nanotechnology Council, Nanotechnology Council for research in nanotechnology. The main considerations for judging include distincti ...
and the 2013 IEEE David Sarnoff Award. In 2011, Prof. John was selected as a Thomson-Reuters Citation Laureate. Recently. Prof. John was awarded the Killam Prize in Natural Sciences for 2014 by the Canada Council for the Arts. In 2017, he was appointed as an Officer of the Order of Canada "For his revolutionary contributions to optical sciences, notably for his role in the development of new structures capable of harnessing the flow of light." In 2021, Prof. John was awarded th
Herzberg Canada Gold Medal
by the Natural Sciences and Engineering Research Council of Canada. Dr. John also received the 1996 Herzberg Medal for Physics and the 2007 Brockhouse Medal for Condensed Matter and Materials Physics from the
Canadian Association of Physicists Canadian Association of Physicists (CAP), or in French Association canadienne des physiciens et physiciennes (ACP) is a Canadian professional society that focuses on creating awareness among Canadians and Canadian legislators of physics issues, spo ...
. He received the first ever McLean Fellowship from the University of Toronto in 1996, the 1997 Steacie Prize in Science and Engineering from the National Research Council of Canada, and the 2004 Rutherford Medal from the Royal Society of Canada. He is the first ever winner of Brockhouse Canada Prize in 2004, which he shared with materials chemist Geoffrey Ozin for their groundbreaking interdisciplinary work on photonic
band gap In solid-state physics, a band gap, also called an energy gap, is an energy range in a solid where no electronic states can exist. In graphs of the electronic band structure of solids, the band gap generally refers to the energy difference ( ...
materials synthesis. Professor John has also received the Killam Fellowship of the Canada Council for the Arts, the Guggenheim Fellowship (USA), the Japan Society for the Promotion of Science Fellowship, and the Humboldt Senior Scientist Award (Germany). In 2007, Dr. John was awarded the C.V. Raman Chair Professorship of the Government of India. Prof. John is a Fellow of the American Physical Society, the
Optical Society of America Optica (formerly known as The Optical Society (OSA) and before that as the Optical Society of America) is a professional society of individuals and companies with an interest in optics and photonics. It publishes journals and organizes conference ...
, the Royal Society of Canada, and a member of the Max Planck Society of Germany. He was the 2011 Elizabeth R. Laird Lecturer at the Memorial University of Newfoundland.


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External links


Sajeev John's University of Toronto home pageWhy trap light?Photonic Band Gap Materials: Semiconductors of Light (YouTube)Photonic Crystals Increase Solar Cell Efficiency (YouTube)
{{DEFAULTSORT:John, Sajeev 1957 births Living people Canadian physicists Fellows of the Royal Society of Canada MIT Department of Physics alumni Harvard University alumni University of Pennsylvania alumni University of Toronto faculty Canada Research Chairs Officers of the Order of Canada Indian emigrants to Canada Fellows of the American Physical Society Optical physicists 20th-century Indian physicists 21st-century Indian physicists Canadian people of Indian descent