New Cloaking Technology

Mai 26, 2009

Researchers of Purdue University, West Lafayette, IN, US announced that they have created a new type of invisibility cloak which works for all colors of the visible spectrum. This new technology, based on a tapered optical waveguide, is simpler than previous designs and makes it possible to cloak objects of about 50 microns in diameter – roughly the width of a human hair. “All previous attempts at optical cloaking have involved very complicated nanofabrication of metamaterials containing many elements, which makes it very difficult to cloak large objects,” said Vladimir Shalaev, Purdue University’s Robert and Anne Burnett Professor of Electrical Engineering. “Here, we showed that if a waveguide is tapered properly it acts like a sophisticated nanostructured material.” Previous experiments with metamaterials have been limited to cloaking regions only a few times larger than the wavelengths of visible light. This findings could lead to advances in e.g. cloaking; powerful “hyperlenses” resulting in microscopes 10 times more powerful than today’s; computers and consumer electronics that use light instead of electronic signals to process information; advanced sensors; and more efficient solar collectors. Findings are detailed in a research paper appearing May, 29 in Physical Review Letters.

SPIE Europe Optics and Optoelectronics

April 16, 2009

New applications for EUV, VUV, and x-ray technologies and other topics in photonics will be among highlights of SPIE Europe Optics and Optoelectronics to be held April 20-23, 2009 in Prague, Czech Republic. Approximately 450 papers will be presented in 10 technical conferences on:

- Harnessing Relativistic Plasma Waves as Novel Radiation Sources from Terahertz to X-rays and Beyond
- EUV and X-ray Optics: Synergy between Laboratory and Space
- Damage to VUV, EUV, and X-ray Optics
- Metamaterials
- Nonlinear Optics and Applications
- Photon Counting Applications
- Quantum Optics and Quantum Information Transfer and Processing
- Optical Sensors
- Photonic Crystal Fibres
- Holography: Advances in Classical Holography and Modern Trends

Prague, Czech Republic (source:

Prague, Czech Republic (source:


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