Open Conference Systems
Not a member yet
683 research outputs found
Sort by
Long Wavelength Infrared Detection by Combining Nano-Thermoelectrics and Sub-Wavelength Absorbers
No full textDetection of infrared (IR) radiation is required in numerous applications from spectroscopic gas sensing to thermal imaging. Obtaining high speed and sensitivity, low-power operation, and cost-effectiveness with a single technology remains to be a challenge in the field of IR sensing. By combining nano-thermoelectric heat-to-voltage transduction and sub-wavelength absorbers, we demonstrate uncooled IR bolometer technology that provides fast and high sensitivity response to long-wavelength IR (LWIR) around 8 - 12 µm and is material-compatible with large-scale CMOS fabrication
Large-area self-assembly of anisotropic Palladium nanostructures for SERS applications
No full textHere, we report for the first time a facile one-step fabrication route of anisotropic palladium nanoparticles (Pd NPs) with high SERS performance by polymer self-assembly
Recent progress in the frequency selective metasurfaces in mid infrared wavelength
No full textHere we summarized the recent progress of plasmonic meta surfaces in mid infrared wavelength region. The experimentally measured optical properties were com- pared with simulations by Finite difference time-domain calculations. Also, we demonstrate applications of these structures for the plasmonic IR-light sources and detec- tors.and another sensing devices
In Situ Enhanced Conductivity of Flexible Composite Polymers for Future Fluidic Antenna
No full textIn this work, the preparation and the physical evaluation of a series of miscible 0.2 M solutions in 50/50 volume ratios were addressed. A total of 5 solutions comprised of plain electrolyte/ graphene, plain electrolyte / graphene-ethylene Glycol, plain electrolyte/ graphene-poly-ethylene glycol, plain electrolyte/ graphene-glycerol, and plain electrolyte/ Graphene–Polyethylenimine. were assembled with Ag, and copper nanoparticles. The physical properties were studied by electrochemical impedance spectroscopy, solution conductivity calculations, and viscosity and flexibility measurements, particle size distribution analyses. Surface morphology characterizations were done by transmission electron microscopy. A comparative approach of the physical properties between the fives solutions serves as a guide to select the most appropriate fluid applicable to the upcoming device
Efficient computation of EM scattering from a dielectric cylinder covered with graphene strips
No full textWe present a numerical approach for the solution of EM scattering from a dielectric cylinder partially covered with graphene. It is based on Fourier-Bessel expansions inside and outside the cylinder. We apply the ad-hoc boundary conditions in the presence of graphene but due to the singular nature of the electric field at the ends of graphene, we introduce auxiliary boundary conditions. The result is a very simple and very efficient method allowing the study of diffraction from such structures
Graphene loaded 1 x 3 MIMO Terahertz Wideband Antenna with High Isolation for Medical and Short Indoor Applications
No full textIn this paper, novel approach tri – element Multiple – Input Multiple – Output (MIMO) terahertz (THz) antenna is designed to cover wide band characteristics from 2.44 – 3.09THz for medical, short – indoor and THz applications. The proposed MIMO antenna is designed on quartz glass dielectric material within compact size of 120µm x 60µm, offers of wide impedance bandwidth (IBW) of 0.65THz, isolation less than -25dB, peak gain 6.82dB and high radiation efficiency of 92 – 98%. The MIMO antenna parameters are envelope correlation coefficient (ECC), diversity gain (DG), total active reflection coefficient (TARC), channel capacity loss (CCL) and mean effective gain (MEG) are within acceptable limit
Dielectric Nanoantennas for Versatile Light Control
No full textWe apply silicon nanoparticles to achieve directional light scattering, directional emission of two-dimensional transition metal dichalcogenides (2D TMDs), and room-temperature near-intrinsic exciton linewidth in 2D TMDs. Hydrogenated amorphous and core-shell nanoparticles are synthesized to suppress optical loss and enable broadband directional scattering. A modified Mie theory for dipole-sphere hybrid systems is developed, along with numerical simulations, to instruct the optimal antenna design. We extend the theory to study a chiral emitter coupled with a silicon nanosphere
Dipole-Dipole Coupling Mediated by Lattice Resonances
No full textOrdered arrays of metallic nanostructures support collective modes known as lattice resonances, which give rise to very strong and spectrally narrow optical responses. Here, we show that, thanks to their collective nature, the lattice resonances of a periodic array of metallic nanoparticles can mediate an efficient long-range coupling between two dipole emitters placed near the array
LTCC-Integrated Antennas for mmWave Applications
No full textIn this talk, the successful use of LTCC technology for the design of two novel LTCC-integrated antennas will be presented. The first design consists of a fully integrated, single fabrication, dielectric resonator antenna array operating between 27 and 31 GHz. The second design consists of a horn antenna that is vertically integrated in a thick multi-layer LTCC substrate designed for operation between 50 and 75 GHz with a WR15 feed
The Next Generation of Metasurface Antennas
No full textToday we are facing a transition to the third generation of MTS antennas, where MTSs change boundary conditions in space and time, opening new perspectives in 5G communications and beyond. In this presentation, the evolution of MTS antennas is described, with new ideas and examples on future communication scenarios. Fig. 1 presents a roadmap and some pictures of prototypes presented in the talk