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 lattices of semiconductors affect their conductivity of electrons. Photonic crystals occur in nature in the form of structural coloration and animal reflectors, and, as artificially produced, promise to be useful in a range of applications.
Sajeev John, OC, FRSC is a Professor of Physics at the University of Toronto and Canada Research Chair holder. He is known for his discovery of photonic crystals.
A quantum well is a potential well with only discrete energy values.
Thermophotovoltaic (TPV) energy conversion is a direct conversion process from heat to electricity via photons. A basic thermophotovoltaic system consists of a hot object emitting thermal radiation and a photovoltaic cell similar to a solar cell but tuned to the spectrum being emitted from the hot object.
Indium gallium nitride is a semiconductor material made of a mix of gallium nitride (GaN) and indium nitride (InN). It is a ternary group III/group V direct bandgap semiconductor. Its bandgap can be tuned by varying the amount of indium in the alloy. InxGa1−xN has a direct bandgap span from the infrared for InN to the ultraviolet of GaN. The ratio of In/Ga is usually between 0.02/0.98 and 0.3/0.7.
Federico Capasso is an applied physicist and is one of the inventors of the quantum cascade laser during his work at Bell Laboratories. He is currently on the faculty of Harvard University.
Martin Andrew Green is an Australian engineer and professor at the University of New South Wales who works on solar energy. He was awarded the 2021 Japan Prize for his achievements in the "Development of High-Efficiency Silicon Photovoltaic Devices". He is editor-in-chief of the academic journal Progress in Photovoltaics.
Third-generation photovoltaic cells are solar cells that are potentially able to overcome the Shockley–Queisser limit of 31–41% power efficiency for single bandgap solar cells. This includes a range of alternatives to cells made of semiconducting p-n junctions and thin film cells. Common third-generation systems include multi-layer ("tandem") cells made of amorphous silicon or gallium arsenide, while more theoretical developments include frequency conversion,, hot-carrier effects and other multiple-carrier ejection techniques.
Vladimir (Vlad) M. Shalaev is a Distinguished Professor of Electrical and Computer Engineering and Scientific Director for Nanophotonics at Birck Nanotechnology Center, Purdue University.
The Clifford Paterson Lecture is a prize lecture of the Royal Society now given biennially on an engineering topic. A £500 gift is given to the lecturer. The lectures, which honour Clifford Copland Paterson, founder-director of the GEC Wembley Research Laboratories 1918-1948, were instituted by the General Electric Company plc in 1975.
Constance J. Chang-Hasnain is chairperson and founder of Berxel Photonics Co. Ltd. and Whinnery Professor Emerita of the University of California, Berkeley. She was President of Optica in 2021.
Crystalline silicon or (c-Si) Is the crystalline forms of silicon, either polycrystalline silicon, or monocrystalline silicon. Crystalline silicon is the dominant semiconducting material used in photovoltaic technology for the production of solar cells. These cells are assembled into solar panels as part of a photovoltaic system to generate solar power from sunlight.
Amnon Yariv is an Israeli-American professor of applied physics and electrical engineering at Caltech, known for innovations in optoelectronics. Yariv obtained his B.S., M.S. and PhD. in electrical engineering from University of California, Berkeley in 1954, 1956 and 1958, respectively.
A luminescent solar concentrator (LSC) is a device for concentrating radiation, solar radiation in particular, to produce electricity. Luminescent solar concentrators operate on the principle of collecting radiation over a large area, converting it by luminescence and directing the generated radiation into a relatively small output target.
Jerry M. Woodall is a professor of electrical and computer engineering at the University of California, Davis who is widely known for his revolutionary work on LEDs and semiconductors. Over the course of his career, he has published close to 400 scientific articles and his work has directly contributed to the development of major technologies that are used around the world, such as TVs, optical fibers, and mobile phones. Woodall currently holds over 80 U.S. patents for a variety of inventions and has received prestigious awards from IBM, NASA, and the U.S. President for his contributions to science, technology, and humanity.
Antonio Luque López is a Spanish scientist and entrepreneur in the field of photovoltaic solar energy. In 1979 he founded the Institute of Solar Energy of the Technical University of Madrid (IES-UPM) and was its director till his retirement in 2017; he is currently its honorary president as well as professor emeritus in this university. He invented the bifacial solar cell in the late 1970s, today one of the mainstream solar cell technologies, and founded Isofoton in 1981 for its industrial production. He is, arguably, one of the fathers of the science and technology of concentrator photovoltaics and has been active in the research and development of high-efficiency photovoltaic conversion devices, inventing the intermediate band solar cell.
James J. Coleman is an electrical engineer who worked at Bell Labs, Rockwell International, and the University of Illinois, Urbana. He is best known for his work on semiconductor lasers, materials and devices including strained-layer indium gallium arsenide lasers and selective area epitaxy. Coleman is a Fellow of the IEEE and a member of the US National Academy of Engineering.
Shanhui Fan is a Chinese-born American electrical engineer and physicist, with a focus on theoretical, computational and numerical aspects of photonics and electromagnetism. He is a professor of electrical engineering, and a professor of applied physics at Stanford University. He is the director of the Edward L. Ginzton Lab and Senior Fellow at the Precourt Institute for Energy.
John E. Bowers is an American physicist, engineer, researcher and educator. He holds the Fred Kavli Chair in Nanotechnology, the director of the Institute for Energy Efficiency and a distinguished professor in the Departments of Electrical and Computer Engineering and Materials at University of California, Santa Barbara. He was the deputy director of American Institute of Manufacturing of Integrated Photonics from 2015 to 2022.
Peter J. Delfyett Jr is an American engineer and Pegasus Professor and Trustee Chair Professor of Optics, ECE & Physics at the University of Central Florida College of Optics and Photonics.
