Photonics for a Better World

The manipulation of light is a core photonics activity performed in numerous ways for numerous practical effects. For example, consider the design of lasers for purposes as diverse as repairing a retina to restore vision and downloading a movie over the internet onto a tablet for viewing. Anatoly Zayats and his team at King's College London have created artificial "rainbows" at the nanoscale. The technology has potential for use in solar energy generation, optical computing, and more. Amazing as those human-scale applications are, imagine manipulating multiple colors of light on a structure about 100 times smaller than the width of a human hair -- and then applying that for the very practical effects of sensing toxins, improving solar cell efficiency, enabling optical circuits for tele- and data communications, and improving flat-screen display. A team of researchers led by Anatoly Zayats in the Biophysics and Nanotechnology Group at King’s College Lond...

Two polar bears on an iceberg. ©Eric Lefranc/Solent After droughts, floods, and a “superstorm” this year, people everywhere are talking about the weather. Some people taking the long-term view are urging us all to not only talk but to think much more deeply -- and even to do something -- about climate change.  "Something extraordinary is going on in the world,” noted New York Times op-ed columnist Nicholas Kristof as Hurricane Sandy began to dissipate. In a column headlined, “ Will climate get some respect now? ” Kristof recalled the amazement of Eskimos in Alaska toward the changes they were seeing: "from melting permafrost to robins (for which their Inupiat language has no word), and even a (shivering) porcupine." Across the Atlantic, Fiona Harvey wrote last week in The Guardian under the headline “ Climate change 'likely to be more severe than some models predict' ” that the latest climate models predict higher temperature rises along with m...

Experts in STEM education (science, technology, education, and mathematics) point out that in teaching, the “how” of science is more important that the “what.” As Shannon Warren , director of a science education partnership grant program in Washington State, noted in a recent magazine feature, learning science means exploring and analyzing, not just memorizing facts and listening to lectures. The “why” is an equally key question, and one that evokes very personalized responses. Professor Jin Kang in his lab at Johns Hopkins University Take Jin Kang ’s story, for example. Twenty years ago, Kang was an undergraduate physics student discovering that while he found the theory behind optics and photonics interesting, what he really loved was building lasers and other optical devices. Kang is now a professor and the chair of the Electrical and Computer Engineering Department at Johns Hopkins University. He conducts research in biophotonics, fiber optics, and optoelectronic ...

"Light is at the origin of all of life," proponents of the declaration of 2015 as the International Year of Light (IYOL) told the UNESCO Executive Board last week. The board agreed at its meeting in Paris, giving its enthusiastic support to an international effort to recognize optics and photonics technologies through a year-long observance in 2015. The rainbow is expected to be the symbol for the International Year of Light. Although a final declaration by the UN General Assembly is not quite a done deal, the UNESCO support paves the way for a large-scale effort to raise awareness of the essential role light-based technologies play in driving industry and enhancing life. Why is awareness so important?. "The science and technology of light have revolutionized medicine, have opened up international communication via the Internet, and are central to linking cultural, economic and political aspects of global society," SPIE Fellow Paul Buah-Bass...

 Roger Angel's prototype solar module based in a spaceframe to continuously track the sun. Image © REhnu Sitting in a conference room, listening to Roger Angel (REhnu and College of Optical Sciences, University of Arizona) talk about how he is refocusing astronomical instrumentation to build highly efficient, cheaper solar cells, or watching Eva-Marie Sevick-Muraca (University of Texas Health Science Center at Houston) show the first-ever video of lymphatic flow inside a human being, or hearing Mario Paniccia (Intel) talk about the amazing advances in computing speed that are around the corner in silicon photonics … well, politics is perhaps not the first thing that comes to mind. But politics definitely does come to mind at some point, and most scientists recognize the importance of the relationship between the two spheres. Today’s endorsement by 68 Nobel Prize winners in science of the candidacy of President Barack Obama for re-election is one illustration. ...

October 2012 issue of SPIE Professional It's estimated that three billion people — more than 40% of the world’s population — use wood, coal, charcoal, and other matter for cooking and heating and that 1.5 billion people lack access to electricity. The human, social, economic, and environmental costs of this inequity are tremendous because energy is fundamental to health, safety, comfort, and progress for all seven billion people on Planet Earth. Yet access to energy varies widely depending on whether people live in a wealthy or a poor country. But more attention is being paid to this growing problem. As Steve Eglash (Stanford University Energy and Environment Affiliates Program) and Kara Fisher (Duke University) write in the October issue of SPIE Professional , the optics and photonics community are finding sustainable ways to generate, convert, store, and use energy without destroying the planet. The importance of sustainable energy was reinforced when the ...

Yes, this excerpt from a study on gender bias in science is from this year, 2012: “Despite efforts to recruit and retain more women, a stark gender disparity persists within academic science." The recent study from Yale University involving several institutions investigated gender bias on the part of faculty in biology, chemistry, and physics, and found that male and female faculty were just as likely to: judge a female student to be less competent and less worthy of being hired than an identical male student offer her a smaller starting salary and less career mentoring appear to be affected by “enduring cultural stereotypes about women’s lack of science competence” that translate into biases in student evaluation and mentoring and yet … report liking the female more than the male student. “I think we were all just a little bit surprised at how powerful the results were -- that not only do the faculty express these biases quite clearly, but the significance a...