115 citations · 654 across the 28 of their papers we have counts for
28 papers
Multifunctional Metasurface: Simultaneous Beam Steering, Polarization Conversion and Phase Offset
Xiaozhen Yang, Erda Wen, Dinesh Bharadia +1
A varactor-based reconfigurable multifunctional metasurface capable of simultaneous beam steering, polarization conversion and phase offset is proposed in this paper. The unit cell…
Real-data-driven Real-time Reconfigurable Microwave Reflective Surface
Erda Wen, Xiaozhen Yang, Daniel F. Sievenpiper
Manipulating the electromagnetic (EM) reflection behavior from an arbitrary surface dynamically on arbitrary design goals is an ultimate ambition for many EM stealth and communicat…
All-passive Microwave-Diode Nonreciprocal Metasurface
Xiaozhen Yang, Erda Wen, Daniel F. Sievenpiper
Breaking reciprocity in the microwave frequency range will have important implications for modern electronic systems. Since it usually involves bulky biasing magnets or complex spa…
Valley polarized edge states beyond inversion symmetry breaking
Dia'aaldin Bisharat, Dan Sievenpiper
Valley-contrast physics has gained considerable attention, particularly for realizing photonic topological insulators (PTIs) that support reflection-free valley-polarized edge mode…
Engineering Equifrequency Contours of Metasurfaces for Self-Collimated Surface Wave Steering
Sara M. Kandil, Dia'aaldin J. Bisharat, Daniel F. Sievenpiper
Metasurfaces provide unique capability in guiding surface waves and controlling their polarization and dispersion properties. One way to do that is by analyzing their equifrequency…
Electromagnetic Nonreciprocity in a Magnetized Plasma Circulator
Feng Li, Robert J. Davis, Sara M. Kandil +1
Nonreciprocal transport of electromagnetic waves within magnetized plasma is a powerful building block towards understanding and exploiting the properties of more general topologic…
Designing Topological Defect Lines Protected by Gauge-dependent Symmetry Indicators
Erda Wen, Dia'aaldin J. Bisharat, Robert J. Davis +2
Symmetry indicators are a modern tool for characterizing topological phases that require only minimal computational expense but provide an elegant means of designing practical devi…
Topologically Protected Edge States in Triangular Lattices
Robert J. Davis, Yun Zhou, Dia'aaldin J. Bisharat +2
We describe the possibility for topologically robust edge states existing on interfaces of triangular lattices which are supported by rotational symmetries that are sensitive to bo…
On-chip unidirectional waveguiding for surface acoustic waves along a defect line in a triangular lattice
Yun Zhou, Naiqing Zhang, Dia'aaldin J. Bisharat +5
The latest advances in topological physics have yielded a rich toolset to design highly robust wave transfer systems, for overcoming issues like beam steering and lateral diffracti…
Power-dependent Reflective Metasurface with Self-induced Bandgap
Xiaozhen Yang, Erda Wen, Daniel F. Sievenpiper
A metallic ring based, diode-integrated, low-profile, power-dependent, reflective metasurface working from 3 GHz to 3.6 GHz is proposed in this letter. Unlike the previous study wh…
Broadband time-modulated absorber beyond the Bode-Fano limit by energy trapping
Xiaozhen Yang, Erda Wen, Daniel F. Sievenpiper
Wide-band absorption is a popular topic in microwave engineering to protect sensitive devices against broadband sources. However, the Bode-Fano criterion defines the trade-off betw…
Chiral Surface Wave propagation with Anomalous Spin-momentum Locking
Sara M. Kandil, Dia'aaldin J. Bisharat, Daniel F. Sievenpiper
The ability to control the directionality of surface waves by manipulating its polarization has been of great significance for applications in spintronics and polarization-based op…
Photonic topological insulators a beginner's introduction
Dia'aaldin J. Bisharat, Robert J. Davis, Yun Zhou +2
Control and manipulation of electromagnetic waves has reached a new level with the recent understanding of topological states of matter. These metamaterials have the potential to r…
Classical-to-Topological Transmission Line Couplers
Robert J. Davis, Dia'aaldin J. Bisharat, Daniel F. Sievenpiper
Recent advances in topologically robust waveguiding for electromagnetic systems have presented opportunities for improving practical photonic and microwave devices. To bring this r…
Confining and channeling sound through coupled resonators
Yun Zhou, Prabhakar R. Bandaru, Daniel F. Sievenpiper
Confining sound is of significant importance for the manipulation and routing acoustic waves. We propose a Helmholtz resonator (HR) based subwavelength sound channel formed at the…
Topological valley transport under long-range deformations
Zhixia Xu, Xianghong Kong, Robert J. Davis +4
Edge states protected by bulk topology of photonic crystals show robustness against short-range disorder, making robust information transfer possible. Here, topological photonic cr…
Electromagnetic-dual metasurfaces for topological states along a one-dimensional interface
Diaaaldin J. Bisharat, Daniel F. Sievenpiper
The discovery of topological insulators has rapidly been followed by the advent of their photonic analogues, motivated by the prospect of backscattering-immune light propagation. S…
Spin-momentum locked modes on anti-phase boundaries in photonic crystals
Xianghong Kong, Yun Zhou, Gaobiao Xiao +1
An anti-phase boundary is formed by shifting a portion of photonic crystal lattice along the direction of periodicity. A spinning magnetic dipole is applied to excite edge modes on…
Waveform Selective Surfaces
Hiroki Wakatsuchi, Jiang Long, Daniel F. Sievenpiper
The role of frequency is very important in electromagnetics since it may significantly change how a material interacts with an incident wave if the frequency spectrum varies. Here,…
Topologically protected pseudospins in 2D spring-mass system
Yun Zhou, Prabhakar Bandaru, Daniel Sievenpiper
It is proposed that a lattice, with constituent masses and spring constants, may be considered as a model system for topological matter. For instance, a relative variation of the i…
Electron emission by long and short wavelength lasers: essentials for the design of plasmonic photocathodes
Ebrahim Forati, Dan Sievenpiper
Theory of electron emission by metallic photocathodes under the exposure of long wavelength lasers will be studied. Energy of photons in long wavelength lasers is less than the wor…
Field Enhancement in Plasmonic Nanostructures
Shiva Piltan, Dan Sievenpiper
Efficient generation of charge carriers from a metallic surface is a critical challenge in a wide variety of applications including vacuum microelectronics and photo-electrochemica…
Plasmonic Nano-arrays for Enhanced Photoemission and Photodetection
Shiva Piltan, Dan Sievenpiper
Efficient conversion of photons to electrical energy has a wide variety of applications including imaging, energy harvesting, and infrared detection. The coupling of electromagneti…
Guiding waves along an infinitesimal line between impedance surfaces
Dia'aaldin J. Bisharat, Daniel F. Sievenpiper
We present a new electromagnetic mode that forms at the interface between two planar surfaces laid side by side in free space, effectively guiding energy along an infinitesimal, on…