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Berkeley Lab Researchers Use Metamaterials to Observe Giant Photonic Spin Hall Effect

By Guest PostApril 1, 2013Scienceantenna configurations, arm configuations, artificial nanoconstructs, berkeley lab, ccd, charge coupled device, doe, electron, future of computing, geometry parameters, gold nanoantennas, hall effect, image, junsuk rho, magnetic moment, metamaterials, optical properties, photonic spin, physical motion, physicist edwin hall, quantized angular momentum, quantum measurements, quantum mechanics, scanning electron microscopy, spin, xiang zhang, xiaobo yin, yuan wang, ziliang ye

Researchers with the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) have once again demonstrated the incredible capabilities of metamaterials – artificial nanoconstructs whose optical properties arise from their physical structure rather than their chemical composition. Engineering a unique two-dimensional sheet of gold nanoantennas, the researchers were able to obtain the strongest signal yet of the photonic spin Hall effect, an optical phenomenon of quantum mechanics that could play a prominent role in the future of computing.

“With metamaterial, we were able to greatly enhance a naturally weak effect to the point where it was directly observable with simple detection techniques,” said Xiang Zhang, a faculty scientist with Berkeley Lab’s Materials Sciences Division who led this research. “We also demonstrated that metamaterials not only allow us to control the propagation of light but also allows control of circular polarization. This could have profound consequences for information encoding and processing.” (more…)

Berkeley Lab Researchers Create Nanoscale Waveguide for Future Photonics

By Guest PostJune 3, 2011Sciencebio medical sensing, electromagnetic waves, guy bartal, hybrid plasmon polariton, microprocessors, nanoscale lasers, nanoscale photonic applications, nanoscale waveguides, near field scanning optical microscopy, next generation on chip optical communication systems, nsom, optical computing, photonic circuits, photonic devices, plasmons, quasiparticle, rupert oulton, semiconductor, silicon on insulator platform, soi, spp, surface plasmon polariton, volker sorger, xiang zhang, xiaobo yin, yuan wang, ziliang ye

The creation of a new quasiparticle called the “hybrid plasmon polariton” may throw open the doors to integrated photonic circuits and optical computing for the 21^st century. Researchers with the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) have demonstrated the first true nanoscale waveguides for next generation on-chip optical communication systems.

“We have directly demonstrated the nanoscale waveguiding of light at visible and near infrared frequencies in a metal-insulator-semiconductor device featuring low loss and broadband operation,” says Xiang Zhang, the leader of this research. “The novel mode design of our nanoscale waveguide holds great potential for nanoscale photonic applications, such as intra-chip optical communication, signal modulation, nanoscale lasers and bio-medical sensing.” (more…)

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Berkeley Lab Researchers Use Metamaterials to Observe Giant Photonic Spin Hall Effect

Berkeley Lab Researchers Create Nanoscale Waveguide for Future Photonics