284 citations · 2.2k across the 91 of their papers we have counts for
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Theory and New Amplification Regime in Periodic Multi Modal Slow Wave Structures with Degeneracy Interacting with an Electron Beam
Mohamed Othman, Venkata Ananth Tamma, Filippo Capolino
We present the theory of a new amplification regime in Travelling Wave Tubes (TWTs) composed of a slow-wave periodic structure that supports multiple electromagnetic modes that can…
Giant Gain Enhancement in Photonic Crystals with a Degenerate Band Edge
Mohamed Othman, Farshad Yazdi, Alex Figotin +1
We propose a new approach leading to giant gain enhancement. It is based on unconventional slow wave resonance associated to a degenerate band edge (DBE) in the dispersion diagram…
Generation of Vortex Beams with Strong Longitudinally Polarized Magnetic Field by Using a Metasurface
Mehdi Veysi, Caner Guclu, Filippo Capolino
A novel method of generation and synthesis of azimuthally E-polarized vortex beams is presented. Along the axis of propagation such beams have a strong longitudinally polarized mag…
Photo-induced Magnetic Force Between Nanostructures
Caner Guclu, Venkata Ananth Tamma, Hemantha Kumar Wickramasinghe +1
Photo-induced magnetic force between nanostructures, at optical frequencies, is investigated theoretically. Till now optical magnetic effects are not used in scanning probe microsc…
Fano collective resonance as complex mode in a two dimensional planar metasurface of plasmonic nanoparticles
Salvatore Campione, Domenico de Ceglia, Caner Guclu +3
Fano resonances are features in transmissivity/reflectivity/absorption that owe their origin to the interaction between a bright resonance and a dark (i.e., sub-radiant) narrower r…
A thin anisotropic metasurface for simultaneous light focusing and polarization manipulation
Mehdi Veysi, Ozdal Boyraz, Filippo Capolino
The possibility of integration of two important categories of optical components, i.e., circular polarizer and lens, into a thin plasmonic metasurface is examined. After exploring…
Radiative Emission Enhancement Using Nano-antennas Made of Hyperbolic Metamaterial Resonators
Caner Guclu, Ting Shan Luk, George T. Wang +1
A hyperbolic metamaterial (HM) resonator is analyzed as a nano-antenna for enhancing the radiative emission of quantum emitters in its vicinity. It has been shown that the spontane…
Electrodynamic modeling of strong coupling between a metasurface and intersubband transitions in quantum wells
Salvatore Campione, Alexander Benz, John F. Klem +3
Strong light-matter coupling has recently been demonstrated in sub-wavelength volumes by coupling engineered optical transitions in semiconductor heterostructures (e.g., quantum we…
Optical Leaky-Wave Antenna Integrated in Ring Resonator
Caner Guclu, Mehdi Veysi, Ozdal Boyraz +1
A leaky-wave antenna at optical frequencies is designed and integrated with a ring resonator at 1550 nm wavelength. The leaky wave is generated by using periodic perturbations in t…