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Bayn I.,Microelectronics Research Center Israel | Meyler B.,Microelectronics Research Center Israel | Salzman J.,Microelectronics Research Center Israel
New Journal of Physics | Year: 2011

Diamond photonics provides an attractive architecture to explore room temperature cavity quantum electrodynamics and to realize scalable multiqubit computing. Here, we review the present state of diamond photonic technology. The design, fabrication and characterization of a novel nanobeam cavity produced in a single crystal diamond are demonstrated. The present cavity design, based on a triangular cross-section, allows vertical confinement and better signal collection efficiency than that of slab-based nanocavities and eliminates the need for a pre-existing membrane. The nanobeam is fabricated by focused-ion-beam (FIB) patterning. The cavity is characterized by confocal photoluminescence. The modes display quality factors of Q ∼ 220 and deviate in wavelength by only ∼1.7 nm from the nitrogen-vacancy (NV?) color center zero phonon line (ZPL). The measured results are found to be in good agreement with three-dimensional finite-difference-time-domain (FDTD) calculations. A more advanced cavity design with Q = 22 000 is modeled, showing the potential for high-Q implementations using the triangular geometry. The prospects of this concept and its application in spin non-demolition measurement and quantum computing are discussed. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.


Brox M.,University of Cordoba, Spain | Sanchez-Solano S.,CSIC - National Center of Microelectronics | Del Toro E.,Microelectronics Research Center Israel | Brox P.,CSIC - National Center of Microelectronics | Moreno-Velo F.J.,University of Huelva
IEEE Transactions on Industrial Informatics | Year: 2013

This paper describes two computer-aided design (CAD) tools for automatic synthesis of fuzzy logic-based inference systems. The tools share a common architecture for efficient hardware implementation of fuzzy modules, but are based on two different design strategies. One of them is focused on the generation of standard VHDL code, which can be later implemented on a reconfigurable device [field-programmable gate array (FPGA)] or as an application-specific integrated circuit (ASIC). The other one uses the Matlab/Simulink environment and tools for development of digital signal processing (DSP) systems on Xilinx's FPGAs. Both tools are included in the last version of Xfuzzy, which is a specific environment for designing complex fuzzy systems, and they provide interfaces to commercial VHDL synthesis and verification tools, as well as to conventional FPGA development environments. As demonstrated by the included design example, the proposed development strategies speed up the stages of description, synthesis, and functional verification of embedded fuzzy inference systems. © 2005-2012 IEEE.


Bayn I.,Massachusetts Institute of Technology | Mouradian S.,Massachusetts Institute of Technology | Li L.,Massachusetts Institute of Technology | Goldstein J.A.,Massachusetts Institute of Technology | And 10 more authors.
Applied Physics Letters | Year: 2014

A scalable approach for integrated photonic networks in single-crystal diamond using triangular etching of bulk samples is presented. We describe designs of high quality factor (Q = 2.51 × 106) photonic crystal cavities with low mode volume (Vm = 1.062 × (λ/n)3), which are connected via waveguides supported by suspension structures with predicted transmission loss of only 0.05 dB. We demonstrate the fabrication of these structures using transferred single-crystal silicon hard masks and angular dry etching, yielding photonic crystal cavities in the visible spectrum with measured quality factors in excess of Q = 3 × 103. © 2014 AIP Publishing LLC.


Szameit A.,Solid State Institute | Szameit A.,Friedrich - Schiller University of Jena | Shechtman Y.,Solid State Institute | Osherovich E.,Technion - Israel Institute of Technology | And 13 more authors.
Nature Materials | Year: 2012

Coherent Diffractive Imaging (CDI) is an algorithmic imaging technique where intricate features are reconstructed from measurements of the freely diffracting intensity pattern. An important goal of such lensless imaging methods is to study the structure of molecules that cannot be crystallized. Ideally, one would want to perform CDI at the highest achievable spatial resolution and in a single-shot measurement such that it could be applied to imaging of ultrafast events. However, the resolution of current CDI techniques is limited by the diffraction limit, hence they cannot resolve features smaller than one half the wavelength of the illuminating light. Here, we present sparsity-based single-shot subwavelength resolution CDI: algorithmic reconstruction of subwavelength features from far-field intensity patterns, at a resolution several times better than the diffraction limit. This work paves the way for subwavelength CDI at ultrafast rates, and it can considerably improve the CDI resolution with X-ray free-electron lasers and high harmonics. © 2012 Macmillan Publishers Limited. All rights reserved.


Sanchez-Solano S.,Institute Microelectronica Of Seville Imse Cnm Csic | Brox M.,University of Cordoba, Spain | del Toro E.,Microelectronics Research Center Israel | Brox P.,Institute Microelectronica Of Seville Imse Cnm Csic | Baturone I.,Instituto Demicroelectronica Of Seville Imse Cnmcsic
IEEE Transactions on Industrial Informatics | Year: 2013

The complexity reached by current applications of industrial control systems has motivated the development of new computational paradigms, as well as the employment of hybrid implementation techniques that combine hardware and software components to fulfill system requirements. On the other hand, continuous improvements in field-programmable devices today make possible the implementation of complex control systems on reconfigurable hardware, although they are limited by the lack of specific design tools and methodologies to facilitate the development of new products. This paper describes a model-based design approach for the synthesis of embedded fuzzy controllers on field-programmable gate arrays (FPGAs). Its main contributions are the proposal of a novel implementation technique, which allows accelerating the exploration of the design space of fuzzy inference modules, and the use of a design flow that eases their integration into complex control systems and the joint development of hardware and software components. This design flow is supported by specific tools for fuzzy systems development and standard FPGA synthesis and implementation tools, which use the modeling and simulation facilities provided by the Matlab environment. The development of a complex control system for parking an autonomous vehicle demonstrates the capabilities of the proposed procedure to dramatically speed up the stages of description, synthesis, and functional verification of embedded fuzzy controllers for industrial applications. © 2005-2012 IEEE.


Bayn I.,Microelectronics Research Center Israel | Meyler B.,Microelectronics Research Center Israel | Lahav A.,Microelectronics Research Center Israel | Salzman J.,Microelectronics Research Center Israel | And 9 more authors.
Diamond and Related Materials | Year: 2011

The realization of photonic crystals (PC) in diamond is of major importance for the entire field of spintronics based on fluorescent centers in diamond. The processing steps for the case of diamond differ from those commonly used, due to the extreme chemical and mechanical properties of this material. The present work summarizes the state of the art in the realization of PC's in diamond. It is based on the creation of a free standing diamond membrane into which the desired nano-sized patterns are milled by the use of Focused-Ion-Beam (FIB). The optimal fabrication-oriented structure parameters are predicted by simulations. The milling strategies, the method of formation the diamond membrane, recipes for dielectric material-manipulation in FIB and optical characterization constraints are discussed in conjunction with their implication on PC cavity design. The thus produced structures are characterized via confocal photoluminescence. © 2011 Elsevier B.V. All rights reserved.


Bayn I.,Microelectronics Research Center Israel | Bolker A.,Solid State Institute | Cytermann C.,Solid State Institute | Meyler B.,Microelectronics Research Center Israel | And 3 more authors.
Applied Physics Letters | Year: 2011

The nitrogen vacancy color center (NV-) in diamond is of great interest for photonic applications. Diamond nano-photonic structures are often implemented using focused-ion-beam (FIB) processing, leaving a damaged surface which has a detrimental effect on the color center luminescence. The FIB processing effect on single crystal diamond surfaces and their photonic properties is studied by time of flight secondary ion mass spectrometry and photoluminescence. Exposing the processed surface to hydrogen plasma, followed by chemical etching, drastically decreases implanted Ga concentration, resulting in a recovery of the NV- photo-emission and in a significant increase of the NV-/NV0 ratio. © 2011 American Institute of Physics.


Shlafman M.,Microelectronics Research Center Israel | Bayn I.,Microelectronics Research Center Israel | Salzman J.,Microelectronics Research Center Israel
Optics Express | Year: 2010

For practical applications in quantum electrodynamics, it has been proposed to produce frequency tuning or Q-switching by dynamically changing the dielectric constant around a nano-cavity. Local changes in the dielectric constant of a photonic cavity with finite-lifetime, may affect not only the frequency of electromagnetic cavity modes but also their qualityfactor (Q). Thus, it is important to have prediction capability regarding the combined effect of these changes. Here perturbation theory, usually applied to eigenmodes with real eigenvalues, is formulated in the complex domain, in which the eigen-frequency imaginary part is related to the Q-factor. Normalizable leaky modes, and bi-orthogonality in a finite volume are the basis for such a formulation. We introduce such capabilities by presenting semi-analytical expressions of first order perturbation analysis for a 3D cavity with radiation losses. The obtained results are in good agreement with numerical calculations. © 2010 Optical Society of America.


Bayn I.,Microelectronics Research Center Israel | Meyler B.,Microelectronics Research Center Israel | Salzman J.,Microelectronics Research Center Israel | Kalish R.,Technion - Israel Institute of Technology
Optics InfoBase Conference Papers | Year: 2011

A single crystal diamond nanobeam with a triangular cross-section and 1D-Bragg reflectors is reported. Modeling shows Q≈2.5×106, Vm=1.06×(λ/n)3. A low-Q cavity version was fabricated by Focused-Ion-Beam, exhibiting a clear mode confinement spectrum. © OSA/CLEO 2011.


Nagy A.,Microelectronics Research Center Israel | Polanco A.,Microelectronics Research Center Israel | Alvarez M.,Microelectronics Research Center Israel
Active and Passive Electronic Components | Year: 2011

The rising complexity of electronic systems, the reduction of components size, and the increment of working frequencies demand every time more accurate and stable integrated circuits, which require more precise simulation programs during the design process. PSPICE, widely used to simulate the general behavior of integrated circuits, does not consider many of the physical effects that can be found in real devices. Compact models, HICUM and MEXTRAM, have been developed over recent decades, in order to eliminate this deficiency. This paper presents some of the physical aspects that have not been studied so far, such as the expression of base-emitter voltage, including the emitter emission coefficient effect (n), physical explanation and simulation procedure, as well as a new extraction method for the diffusion potential V DE (T), based on the forward biased base-emitter capacitance, showing excellent agreement between experimental and theoretical results. © 2011 Agnes Nagy et al.

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