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From EBG’s to Meta-Surfaces and Beyond: Recent Developments and Novel Engineering Applications
No full textThis plenary talk will review the development of various electromagnetic meta-structures, as well as the state-of-the-art concepts, designs and manufacturing techniques including Fused Deposition Modeling (FDM), Stereolithography (SLA), Direct Metal Laser Sintering (DMLS), Inkjet printing and Charge-Programmed Multi-material 3D Printing. Furthermore, a wealth of practical examples will be presented to illustrate promising applications of these intriguing concepts. Â
Integrated microresonator frequency comb source for massive-parallel optical communication
No full textWe demonstrated ultra-dense wavelength-division multiplexing (WDM) data transmission using an intensity modulation and direct detection (IM-DD) scheme. We discuss the feasibility of SiN and MgF2 microresonators for WDM applications regarding output power, bandwidth, and required pumping power. In addition, we discuss that IM-DD communication is relevant to the next-generation optical communication that requires ultra-low latency
Decentralized Wireless Coordination for Distributed Antenna Arrays
No full textWe present new approaches to wireless coordination of distributed antenna arrays using decentralized algorithms.,Synchronization of the electrical states of elements in distributed arrays is necessary for distributed coherent operations such as,beamforming. In large arrays, traditional centralized synchronization topologies yield susceptibilities to element failures and,interference. Based on consensus averaging, we discuss new methods of synchronizing the relative phases and frequencies of,distributed antenna array elements, and analyze the impact of residual errors on beamforming performance
First-order perturbation theory for electromagnetic eigenmodes
No full textWe present an accurate first order perturbation theory for the electromagnetic eigenmodes of a resonator, which is based on the spectral representation of the Green’s dyadic. We show that when the resonator boundary is deformed, higher-order terms of the standard perturbation series can contribute to the eigenmode frequencies in first-order in the deformation depth. This is a consequence of the vectorial nature of the electromagnetic field and the infinite degeneracy of static modes of the resonator
Temporal dynamic of strongly coupled epsilon-near-zero media
No full textWe shall present an overview of our recent investigations into the time-dependent effects observed in transparent conductive oxides photoexcited at the epsilon near zero point. We will then discuss the role of the epsilon-near-zero mode in establishing the temporal dynamics in strongly coupled plasmonic systems
Towards Robust Optical Data Processing with Photonic Integrated Circuits
No full textIn this talk, we review recent advances in robust optical data processing using silicon PICs: 1) On-chip reconfigurable optical full-field manipulation for grooming photonic signal processor (reconfigurable optical add/drop multiplexer, filter); 2) On-chip mesh-structure-enabled programmable multi-task photonic signal processor (filter, delay, router, switch); 3) On-chip multi-dimensional (mode, polarization, wavelength) selective switch; 4) On-chip intelligent mode switching in fiber-chip-fiber communication systems
Koch Curve Polar Coordinate Transform for UWB Antenna Applications
No full textFractal antennas allow for the design of Ultrawide-band (UWB) antennas with a reduced footprint; we present a novel technique for generating antenna geometries which extend the Koch snowflake to angles other than 60 degrees. This is achieved by generating a Koch curve of an arbitrary indentation angle and then circumscribing the curve about the origin. Using our method, we achieve a 36% footprint area reduction compared to a traditional Koch snowflake antenna with center frequency of 4.1GHz
The Numerical Results of the Magnetic Behavior of the Thin-layers SFCL
No full textIn this paper, we present some numerical results of the magnetic behavior of superconducting fault current limiters (SFCLs). The numerical problem of this study is solved using the method of volume control (CVM). The electromagnetic and thermal coupling is ensured by an alternative algorithm. To describe the relationship between the electric field and the current density inside the thin-film superconductor, we chose to use the power law model widely used in simulation work.Â
A Biomedical Implantable Patch Antenna with X shaped slot for Wireless Communication Networks
No full textThis study presents an Industrial, Scientific, and Medical (ISM) band at 915 MHz. There are four slotted resonators in this patch, which are installed on a flexible Roger Duroid RT5880 substrate with a typical 0.254 mm thickness. The suggested antenna's overall dimensions are 7mm x 7mm x 0.254 mm, and it spans a frequency range of 800 MHz to 1 GHz (200 MHz) under the skin tissue
GSTC formulation for Maxwell’s equations
No full textWe revisit the classical zero-thickness Generalized Sheet Transition Conditions (GSTCs) which are a key tool for efficiently designing metafilms able to control the flow of light in a desired way