Study opens new realms of light-matter interaction

Study opens new realms of light-matter interaction

Some “forbidden” light emissions are in fact possible, could enable new sensors and light-emitting devices. David L. Chandler | MIT News Office July 14, 2016 Emission spectra are a widely used method for identifying chemical compounds; the bright lines reveal the different frequencies of light that can be emitted by an atom. Here, a normal […]

A near infrared holographic glucose sensor

A near infrared holographic glucose sensor

Evangelia Vezouviou et al., have reported  a near infrared holographic glucose sensor. Real-time glucose monitoring has been beneficial in reducing health complications associated with diabetes as well as a decrease in mortality. This report describes a novel holographic platform, fabricated via laser ablation on chitosan hydrogel with gold nanoparticles with a replaying in visible and near […]

Programmable Material Algorithm Solves Universal Coating P...

Programmable Material Algorithm Solves Universal Coating Problem

If you want to measure the temperature at any point on an object’s surface, a thin coating of programmable material can do the job, say computer scientists. January 11, 2016 The world is full of complex structures such as bridges, roads, wind turbines, power stations, and so on, that have to be carefully monitored to […]

Plasmonic Tip Based on Excitation of Radially Polarized Co...

Plasmonic Tip Based on Excitation of Radially Polarized Conical Surface Plasmon Polariton for Detecting Longitudinal and Transversal Fields

Tugchin et al.,  study experimentally the excitation of the radially polarized conical surface plasmon polariton (SPP) in a fully metal-coated conically tapered M-profile fiber which works as a “plasmonic tip” for the scanning near-field optical microscope (SNOM). This structure extends the Kretschmann configuration to the conical geometry. In this plasmonic tip, the radially polarized waveguide mode, […]

Researchers find unexpected magnetic effect

Researchers find unexpected magnetic effect

Combining two thin-film materials yields surprising room-temperature magnetism. David L. Chandler | MIT News Office May 9, 2016 A new and unexpected magnetic effect has taken researchers by surprise, and could open up a new pathway to advanced electronic devices and even robust quantum computer architecture. The finding is based on a family of materials […]

Ultrafast switching of tunable infrared plasmons in indium...

Ultrafast switching of tunable infrared plasmons in indium tin oxide nanorod arrays with large absolute amplitude

  All-optical control of plasmons can enable optical switches with high speeds, small footprints and high on/off ratios. Here Guo et al., demonstrate ultrafast plasmon modulation in the near-infrared (NIR) to mid-infrared (MIR) range by intraband pumping of indium tin oxide nanorod arrays (ITO-NRAs). They observe redshifts of localized surface plasmon resonances arising from a change […]

Fabrication and characterization of nonenzymatic glucose s...

Fabrication and characterization of nonenzymatic glucose sensor based on bimetallic hollow Ag/Pt nanoparticles prepared by galvanic replacement reaction

Fig.1. Schematic of the formation of BH-Ag/Pt NPs at different stages of galvanic replacement process Daqian Ma et al., successfully fabricated a non-enzymatic glucose sensor by immobilization of bimetallic hollow Ag/Pt nanoparticles (BH-Ag/Pt NPs) using the galvanic replacement reaction onto the surface of the pretreated pure Au electrode. The morphology and composition of the BH-Ag/Pt […]

Wide-angle, broadband, and highly efficient holography

Wide-angle, broadband, and highly efficient holography

Jacob Scheuer, Yuval Yifat, Michal Eitan-Wiener, Zeev Iluz, Yael Hanein and Amir Boag Coupled dipole-patch nano-antenna cells are used in a new approach to impose an arbitrary phase profile on reflected light. 28 January 2016, SPIE Newsroom. DOI: 10.1117/2.1201512.006252 Computer-generated holography is a widely used technology for various applications, e.g., from authentication and optical data storage, to […]

Plasmonic optical tweezers: A long arm and a tight grip

Plasmonic optical tweezers: A long arm and a tight grip

  By taking advantage of the thermal gradient that is generated in plasmonic systems and by using an a.c. field, plasmonic tweezers can have a large radius of action and can trap and manipulate single nano-objects.   To have access to this paper, please visit: http://www.nature.com/nnano/journal/v11/n1/full/nnano.2015.253.html

Plasmons Enhance Detection of Wavefront Aberrations

Plasmons Enhance Detection of Wavefront Aberrations

DUBLIN, Dec. 8, 2015 — A sensor that exploits plasmonics to gauge nanoscale distortions in lightwaves could yield more powerful tools for metrology and chemical sensing, as well as sharper microscopes. The method detects wavefront aberrations indirectly by measuring changes in the reflectivity of gold films. It may be the first to use plasmons to […]

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