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Using nanotechnology to enhance the performance of LEDs and other light sources

Technology update

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Lumileds claims double LED brightness

Etched triangular lattices come close to matching encapsulants for light extraction, while side-stepping disadvantages

On patrol: molecular sentinels recognize cancer

Raman scattering nanostructures switch "on" and "off" in response to biomarkers

Nanotubes get fibre lasers pulsing

A broadband saturable absorber based on carbon nanotubes can be used with fibre lasers emitting anywhere between 1 and 2 µm.

Thin-walled boron nitride structure emits in the deep UV

Scaled up nanotube device may suit micro-reactors and compact laser systems

Bismuth nanostructures provide mechanism for automatic switching

Thermo-optical properties tuned by varying the size of embedded nanostructures

Spray-on carbon nanotube electrodes offer scalable solution

Supercapacitors and paper batteries could benefit from modified spray deposition technique

Nanowire wafer tunes over 200 nm

Nanowire technology relaxes lattice mismatch limitation

QD broadband source suits OCT

Post-growth annealing process yields SLED with very flat emission spectra for use in optical coherence tomography

Electric field pilots nanowires into position

AC voltage lines up DNA-coated nanowires for biosensing applications

Carbon nanotubes know where to grow

Localized heating guides particles into position during growth phase best of 2008

Top five most viewed stories of the year

Integrated LED leads to user-friendly SNOM

Compact, pre-aligned design makes imaging technique much easier to implement

WLEDs move forward

French researchers report on improvements in white-LED processing

Cree embeds phosphors at LED die level

Semiconductor nanocrystals convert blue emission from GaN chips into white light

Nanoparticles scatter light in solar cells

Tiny gold particles increase power conversion efficiency of InP/GaAsP quantum-well devices

European synchrotron secures €177m upgrade

New beamlines will allow nanoscale experiments at Grenoble lab

Periodic stack tunes into photonics market

Nanoimprinting method simplifies the fabrication of tunable optical filters

CNTs en route for nanophotonic applications

IBM integrates electrically-driven carbon nanotube emitter with optical microcavity

Feathered photonic crystal takes off

Peacock feather tunes the optical emission of embedded ZnO nanoparticles

Practical Y-splitter channels plasmons

Miniaturized photonic circuits could benefit from branched plasmonic waveguide