Tag archives: optics
By Matin Durrani
And so last night to St James’s Palace in London and the official UK launch of the International Year of Light and Light-based Technologies (IYL 2015). The building, which belongs to the British monarchy and has a long history as a royal residence, might sound a rather grand venue for the event – but when HRH The Duke of York is the patron for IYL 2015 in the UK, then who wouldn’t take up his invitation to host the opening reception for the year?
The evening began with a short speech from the Duke of York, who said that he had always had an interest in physics despite not having taken it as a single subject at school – and that he was “right behind” all the activities taking place in the IYL 2015. “The International Year of Light is about how we have used light over the centuries,” he told the 200 or so guests. “It is how we are applying light, photonics and various other aspects in order to make the world a better place, not only for ourselves, but for future generations.”
By James Dacey
“In the beginning there was light – the Big Bang,” said Steve Chu, talking on Monday at the UNESCO headquarters in Paris during the opening ceremony of the International Year of Light and Light-based Technologies (IYL 2015). Chu – a Nobel-prize winner and former US energy secretary – was among a smorgasbord of speakers at the two-day event, which brought together scientists, artists, politicians and many others with a particular interest in light and its applications.
Being a journalist, I was at the event with my own light-based technology, the humble SLR camera. I was recording a series of interviews with people at the event, including Chu, to get their thoughts on what the year of light means to them. As I’ve mentioned in a previous article, the fact that “light” is such an all-encompassing theme can also make it difficult to get a handle on what IYL 2015 is all about. I hope that the resulting video – to be published on physicsworld.com next week – will bring clarity to some of the initiatives and projects in the spotlight this year.
By Matin Durrani in Paris
It was a grey and dank morning yesterday in the French capital, with even the top of the Eiffel Tower shrouded in clouds – perhaps not the most auspicious weather for the official opening ceremony of the International Year of Light and Light-based Technologies (IYL 2015) here at the headquarters of the UN Educational, Scientific and Cultural Organization (UNESCO).
Inside the conference hall, however, all was brightly lit. The stage was bathed in beams of light in all the colours of the rainbow as the 1500 or so delegates first watched an official IYL 2015 video and then listened as a series of dignitaries voiced their backing for the initiative.
These included a message of support from UN director-general Ban Ki-moon read out by an official and a video recording from Irina Bokova, UNESCO director-general. There were also speakers from Ghana, Mexico, New Zealand, Russia and Saudi Arabia – the five nations that took a key role in getting IYL 2015 approved by the UN in late 2013.
By Matin Durrani
The International Year of Light (IYL 2015), which officially launches today at the headquarters of the UN Educational, Scientific and Cultural Organization (UNESCO) in Paris, is a brilliant initiative, but if you’re wondering how to find out more about the science and applications of light, then I’ve got the perfect place for you to start.
That’s because Physics World magazine is launching today a great, free-to-read digital edition containing 10 of our very best feature articles on the science and applications of light.
By Luisa Cifarelli
Today sees the official launch of the International Year of Light and Light-based Technologies (IYL 2015) with an opening ceremony at the headquarters of the UN Educational, Scientific and Cultural Organization (UNESCO) in Paris. The idea for IYL 2015 was initiated by the European Physical Society (EPS), of which I was president for two years from 2011 to 2013. The EPS proposal was first officially welcomed – and then endorsed – by UNESCO, with full UN backing coming in December 2013.
By James Dacey in Córdoba, Argentina
What’s the best way to teach tricky physics concepts to students? Naturally, this was one of the questions underpinning many of the talks here at the International Conference of Physics Education (IPCE) in Córdoba. According to a couple of educationalists in Latin America at least, it seems that one approach is to enlist the help of some of the great scientists and philosophers of the past.
Patricia del V. Repossi, a lecturer at the Pontificia Universidad Católica Argentina in Buenos Aires, spoke about how she uses the history of science as a framework for teaching optics. Repossi explained how she had come to realize that some of the students taking her conventional optics course believed that photons are made of the same stuff as “tennis balls”. So, she and her colleagues set about transforming the way they teach the topic – by combining a physics class with a history lesson.
By Hamish Johnston
Last year we reported on a fascinating experiment that simulated the quantum Hall effect using light. Mohammad Hafezi and colleagues at the Joint Quantum Institute (JQI) of the University of Maryland created a lattice of ring-shaped silicon waveguides that are placed just nanometres apart (see image above). This allows light in one ring to “tunnel” into a neighbouring ring and make its way across the matrix, hopping from ring to ring.
By Hamish Johnston
At first glance, visible light and nanotechnology seem incompatible because of the diffraction limit, which dictates that features smaller than about half the wavelength of light cannot be resolved optically. For visible light, the diffraction limit is about 300 nm and this means that there is no point in trying to make conventional optical components that are any smaller.
But that pessimistic outlook has changed over the past decade or so thanks to the development of nanophotonics, which makes use of near-field (or evanescent) light and plasmons to manipulate light on length scales much smaller than the diffraction limit. Today, nanophotonics is being used across a range of disciplines, including biological imaging, telecommunications, solar energy and semiconductor processing.
By Matin Durrani
It’s time to tuck into the latest focus issue of Physics World, which explores some of the latest research into optics and lasers.
The focus issue, which can be read here free of charge, kicks off with a report from the Centre for Quantum Photonics at the University of Bristol in the UK, which is driving a new approach to quantum computing based on integrated photonic circuits.
Elsewhere in the issue, you can find out from Joel England, a physicist at Stanford University in the US, about the new photonic research that could see particle accelerators shrunk to the scale of microchips.
Meanwhile, the huge potential of the photonics sector in general is underlined in our keynote interview with the chief executive of Jenoptik, Michael Mertin, who is also president of the European Union’s Photonics21 consortium, which seeks to unify the European photonics community and advises the European Commission on photonics research, development and innovation needs.
By Hamish Johnston
There are two fantastic papers in Physical Review Letters this week that made me smile. Both of them are about controlling macroscopic objects using waves. While there are practical applications for both techniques, I can’t help thinking that the authors did the work for the sheer joy of it.