Open Conference Systems
Not a member yet
683 research outputs found
Sort by
Gap Waveguide Technology Helps Design Efficient Antennas Arrays for mmWave Applications
No full textGap waveguide (GWG) technology will be introduced in this talk, which is a highly efficient guiding structure at millimeter-wave bands. It is self-packaged with no radiation losses. Based on this technology, several highly efficient antenna arrays will be presented
Design and Characterization of Compact Aspen Shape Multi Element Antenna with Isolation Improvement for SWB Applications
No full textFour – element Aspen modeled MIMO antenna printed on Rogers RT / Duroid 5880â„¢ substrate and its compact size is 43mm x 43mm. The proposed antenna produce operating bandwidth of 23.66GHz (4.12 – 27.78GHz) and FBW is 148.33%. Peak gains at selected frequencies 4.8GHz, 8GHz, 14.1GHz, 16.2GHz and 23.6GHz are 3.16dBi, 5.19dBi, 5.82dBi, 5.13dBi and 6.98dBi respectively. MIMO antenna parameters are evaluated.Â
Large scale metasurfaces: from plasmonics to photon harvesting in 2D semiconductor layers
No full textThe nanofabrication of large-area metasurfaces with tunable optoelectronic response is crucial in many fields from plasmonics to energy conversion. Here the engineering of self-organized plasmonic antennas will be demonstrated, showing their performances in photo-degradation of polluting molecules. In parallel, the capability to strongly couple light to large-area 2D semiconductor layers will be shown. Thanks to nanoscale re-shaping of the interface to form flat-optics nanogratings superior photon harvesting performances can be achieved with strong impact in photonics and energy conversion.Â
A direct and an inverse domain decomposition method applied to Fourier modal method: simulation of large scale device response
No full textA parallel spectral modal method is introduced for the frequency-domain Maxwell’s equations. The method is applied to compute electromagnetic field through a large- scale surface, using the Aperiodic Fourier Modal Method (AFMM). In the proposed domain decomposition methods, a large-size surface is squared onto sub-cells. The spectrum of the electromagnetic field component on each sub-cell may be simulated, locally with a coast that is not dependent on the number of the sub-cells, making it suitable for parallel computing
Small target detection from a drone-based phased-array radar
No full textIn the recent years, small UAVs have become accessible for military, commercial and leisure activities. This comes with an increasing apprehension concerning their hazardous and illicit misuses. Radar systems have proved good capabilities for UAV surveillance, but small target detection still remains challenging and subject to active research. In this perspective, the present work deals with clutter mitigation and small target detection using phased-array radar and adaptive processing
Magnetoplasmonic nanocavities for the enhanced magnetic control of light polarization via hybridization with dark plasmons
No full textEnhancing magneto-optical effects is crucial for size reduction of key photonic devices based on non-reciprocal propagation of light and to enable active nanophotonics. Here, we disclose an approach that exploits multipolar Fano resonances excitable in symmetry broken magnetoplasmonic nanocavities and arising from the hybridization of dark plasmons with dipolar plasmonic resonances to achieve an unprecedented amplification of magneto-optical activity
Giant Pockels Effect in Thin Film Barium Titanate for Reconfigurable Photonics
No full textIn this talk I will introduce the barium titanate photonics platform. The Pockels effect is what enables GHz-level switching speeds in optical modulators and switches, so materials which exhibit strong Pockels coefficients are advantageous as they maximize light-matter interaction. Using pulse laser deposition, we have grown single crystal barium titanate on various low index substrates and measured an r-parameter over 600 pm/V. We then experimentally demonstrated polarization modulation
Towards far-field multipole retrieval with a reconfigurable photonic integrated circuit
No full textControlled excitation and measurement of multipoles in nanoscatterers is an important task of increasing interest in nano-optics and nano-metrology. Here, we discuss the implementation of a far-field approach for the retrieval of multipolar contributions to particle scattering. We utilize a reconfigurable photonic integrated circuit capable of measuring spatial phase, polarization and intensity information. We introduce the multipole retrieval scheme and discuss the main concepts of this novel detector, paving the way towards intriguing applications in nano-metrology, microscopy and imaging
Meta-waveguides: a marriage between metasurface and integrated photonics enabling subwavelength control of guided waves
No full textHere, we present metasurface-incorporated waveguides that synergize subwavelength metaphotonic architectures with photonic integrated waveguide platforms. Such meta-waveguides achieve various functions in a completely integrated platform, such as steering and focusing guided waves into free space, projecting holograms with controlled phase and amplitude control, and generating laser emission carrying orbital angular momenta
High Sensitivity SSR Based Sensor Used for Permittivity Measurement
No full textThe proposed compact sensor is based on a Split Square Resonator (SRR) to improve the detection. The dimensions of the SRR have been chosen to provide a mutual coupling with a high sensitivity. The material under test (MUT) is placed in the near-field region of the sensor. This design exhibits a high sensitivity close to 58% as the relative permittivity of MUT’s changes from 1 to 10. The proposed sensor can measure the permeability and losses