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Cohen M.,Ben - Gurion University of the Negev | Cohen M.,Bar - Ilan University | Zalevsky Z.,Bar - Ilan University | Zalevsky Z.,Bar Ilan Institute for Nanotechnology and Advanced Materials | Shavit R.,Ben - Gurion University of the Negev
Nanoscale | Year: 2013

Surface plasmon polaritons (SPPs) may serve as ultimate data processing expedients in future nanophotonic applications. SPPs combine the high localization of electrons with the bandwidth, frequency and propagation properties of photons, thus supplying nature with the best of two worlds. However, although plasmonics have recently gained constantly growing scientific attention, logic devices that operate on SPPs on a deep nanometer scale are yet to be demonstrated. Here, we design, fabricate and experimentally verify the smallest, first ever reported all optical nanoplasmonic XOR logic gate. The introduced XOR device is based on a novel engineerable interferometry scheme with extremely compact dimensions of λ3/15500, which can be used to realize a variety of plasmonic logic functionalities. We use frequency modulated Kelvin probe microscopy to provide evidence of binary XOR functionality performed directly on SPPs with λ3/80000 mode volumes. An extinction ratio of 10 dB is achieved for a device length of 150 nm, increasing up to 30 dB for a device length of 280 nm. Our findings confirm plasmonics as the favorite data carriers in integrated all optical logic devices operating on the deep nanoscale, and pave the way to the development of future ultrafast information processing technologies based on SPPs. © 2013 The Royal Society of Chemistry.


Cohen M.,Bar - Ilan University | Zalevsky Z.,Bar - Ilan University | Zalevsky Z.,Bar Ilan Institute for Nanotechnology and Advanced Materials | Pocovi-Martinez S.,University of Valencia | And 2 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2014

The selective synthesis of gold nanoparticles of any desired size is of great interest. Benzophenone in THF has proved to act as an efficient photocatalyst for the growth of thiolate-capped nanoparticles in the presence and in the absence of gold salts. Consequently, we explored the effect of applying thermal energy to control these processes. These studies have provided key information for the effective growth of gold nanoparticles tailored to specific applications. © 2014 SPIE.


Cohen M.,Bar - Ilan University | Cohen M.,Ben - Gurion University of the Negev | Shavit R.,Ben - Gurion University of the Negev | Abulafia Y.,Bar Ilan Institute for Nanotechnology and Advanced Materials | And 2 more authors.
Conference on Lasers and Electro-Optics Europe - Technical Digest | Year: 2014

We introduce the numerical design, analysis and fabrication of a novel nanoplasmonic phased array architecture for superlensing with geometrically controllable depth of focus. © 2014 Optical Society of America.


Aharoni R.,Bar - Ilan University | Aharoni R.,Bar Ilan Institute for Nanotechnology and Advanced Materials | Baharav O.,Bar - Ilan University | Bidani L.,Bar - Ilan University | And 5 more authors.
Journal of the European Optical Society | Year: 2012

In this paper we present an all-optical silicon based modulator suggested also for high power operation and for pulse picker application being used as part of fiber lasers system. The paper theoretically and experimentally investigates several new and important insights involving the dependence of the relative transmission on the pump pulse energy for different finesse values of the constructed cavity as well as the dependence of the response rate of the device to the pump wavelength due to coexistence of two physical recombination processes: fast surface effect and slow bulk recombination. To adapt the constructed silicon based cavity to be used in lasers applications, we aligned the pump and the signal beams to co-propagate through the device while the usage of a cavity allowed a low power pump to yield a significant extinction ratio at the output of the device.


Aharoni R.,Bar - Ilan University | Aharoni R.,Bar Ilan Institute for Nanotechnology and Advanced Materials | Bidani L.,Bar - Ilan University | Bidani L.,Bar Ilan Institute for Nanotechnology and Advanced Materials | And 4 more authors.
Optical Engineering | Year: 2012

We present the development procedure as well as preliminary fabrication results for a CO2 laser-based tapering rig allowing one stage tapering of optical fibers. Our aim is to develop in-fiber devices constructed from fibers filled with various materials, which can be drawn from thick preforms using the presented procedure. The constructed tapering rig consists of a CO2 laser as the heating source, ellipsoid-based mirror optics, and computer-controlled high-precision motors. © 2012 Society of Photo-Optical Instrumentation Engineers (SPIE).

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