Li-Fi was first introduced to the general public in a TED Talk in 2011, when I showed video streaming using off-the-shelf LED lights. This TED Talk has now been watched more than 1.6 million times, and Li-Fi has been featured by the BBC, New York Times, TIME Magazine, CNN International, ZDF and CNBC, and this indicates the high level of interest and potential high economic and social impact of the new, emerging Li-Fi technologies.
Li-Fi technology uses light waves instead of the current radio frequency spectrum to communicate data. Li-Fi is a bi-directional, networked, mobile, high-speed data communication technology. It complements the existing Wi-Fi, and also has the additional benefits of greater capacity, security and energy efficiency.
The visible light spectrum is huge (about 390 THz of bandwidth are available), licence-free, secure and safe. Devices such as LED lights and photo detectors are inexpensive and in common use, and Li-Fi technology can use the existing lighting systems already in place in rooms and buildings.
Harald Haas on the laboratory. Credit: Harald Haas.
2015 is the International Year of Light and Light-based Technologies. For the sake of brevity, we often omit the “light-based technologies” part when talking about the year, but those three words describe a €300 billion market and a range of components and products that underpin our modern existence. But what are these technologies, and how did they come to be such a significant market?
Early example of impact from light-based technology?. Credit: Wikimedia Commons.
Find below the activities listed on the IYL 2015 Event Programme starting between 29 June – 5 July. Click on the links for more information on the different activities.
- Spectroscopy – interaction of light with matter (Graz, Austria) | 29 June
- ETOP – Education and Training in Optics and Photonics (Bordeaux, Talence, France) | 29 June – 2 July
- An Advanced Introduction to Synchrotron Light (Melbourne, Australia) | 29 June
- International Conference on Laser Spectroscopy (ICOLS 2015) (Singapore) | 29 June – 3 July
- How to be brilliant: with James Siddle (London, United Kingdom) | 30 June
- Inconspicuous and Indispensable: Interference Coating in Photonics (Buchs, Switzerland) | 30 June
- Asteroid Day (Nus, Italy) | 30 July
- IYL KidZone Tent at the Ann Arbor Summer Festival (Ann Arbor, MI, United States) | 30 June
- International Symposium (MTSA 2015 and TeraNano VI) (Okinawa, Japan) | 30 June
- Light Conference (Changchun, China) | 1-7 July
- VISETORM VIII (Madurai, India) | 1-2 July
- Light: Beyond the Bulb (Christchurch, New Zealand) | 1 July – 15 August
- Light: Beyond the Bulb (West Hartford, CT, United States) | 1-31 July
- Light: Beyond the Bulb (Anchorage, AK, United States) | 1 July – 31 December
- Light: Beyond the Bulb (Dolna Mitropolia, Bulgaria) | 1 July – 1 September
- Light: Beyond the Bulb (Belgrade, Serbia) | 1-20 September
- Light: Beyond the Bulb (Brasilia, Brazil) | 1 July – 1 January 2016
- Science in the cafe (Singapore) | 1 July
- 10th International Innovation Day 2015 (Lucknow, India) | 1 July – 10 October
- Light & Optics Kits (São Carlos, Brazil) | 1-20 July
- KUGOMA Mobile Solar Cinema (Maputo and other towns, Mozambique) | 2 July – 31 August
- Light, from the Earth to the Stars (Lisbon, Portugal) | 2-3 July
- How the sting of a stonefish helps unlock the secrets of the immune system (Melbourne, Australia) | 2 July
- The Spectrum of Light (Misrata, Libya) | 2 July
- Summer of Light (Windisch, Switzerland) | 2 July – 27 August
- Ephemeral gardens (Jardins Efémeros) (Viseu, Portugal) | 3-12 July
- Light: Beyond the Bulb (Aldeia da Luz, Portugal) | 3 July – 3 September
- Making light work for your business (Birmingham, United Kingdom) | 3 July
- District level Science seminar (Porbandar, India) | 4 July
- International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors (Suzhou, China) | 4-6 July
- Astronomy Lecture “Cosmic Light” No. 5: See the universe in multi-wave light (Hiratsuka, Japan) | 4 July
- LPWA Astana Special Event 2015 (Astana, Kazakhstan) | 4-6 July
- 14th International Conference on Optical Communications and Networks (ICOCN2015) (Nanjing, China) | 4-6 July
- 17th International Conference on Transparent Optical Networks – ICTON (Budapest, Hungary) | 5-9 July
- European Summer Summer School: Light! (Strasbourg, France) | 5-11 July
- Summer Science Splash Camp: Catch the Wave (St Petersburg, FL, United States) | 5-17 July
Please note that some last-minute additions to the event programme may not appear here. For an up-to-date overview of IYL 2015 events please visit the IYL 2015 Event Programme.
I am fascinated by the systems and structures we use for understanding the world around us, bringing context to the unknown and chaotic. Light and glass play a crucial role in this endeavor, from the transmission of information through fiber optics, as well as the revealing of the distant unknowns, and the microscopic world right in front of our eyes.
“Alternating Entropy” Piece. Credit: Justin Gingsberg.
Electrons are fundamental particles and play an important role in most of the physical phenomena spanning from static electricity to complex chemical and nuclear reactions. Although the existence of this negatively charged entity was theorized in the first half of the 18th century (1)(2), it was discovered by Sir J.J.Thompson in the year 1897 in the form of cathode rays.(3) This discovery is considered to be a highly important for the development of science and technology. The flow of these tiny particles is what drives the sophisticated electronic and electrical equipment, which have become an integral part of life.
Aurorae are mostly caused by energetic electrons precipitating into the atmosphere. Credit: Samuel Blanc / Wikimedia Commons