115 citations · 654 across the 28 of their papers we have counts for
13 papers · 1 filter
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…
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…
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…
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…
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,…
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…