284 citations · 2.2k across the 91 of their papers we have counts for
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Exceptional Point Degeneracy as Desirable Operation Point of Oscillator Array with Discrete Nonlinear Gain and Radiating Elements
Alireza Nikzamir, Filippo Capolino
An oscillator array prefers to operate at an exceptional point of degeneracy (EPD) occurring in a waveguide periodically loaded with discrete nonlinear gain and radiating elements.…
The Azimuthally-Radially Polarized Beam: Helicity and Momentum Densities, Generation and Optimal Chiral Light
Albert Herrero-Parareda, Filippo Capolino
We investigate the optical properties of the azimuthally-radially polarized beam (ARPB), a superposition of an azimuthally polarized beam and a radially polarized beam, which can b…
Frozen Mode Regime in an Optical Waveguide With Distributed Bragg Reflector
Nathaniel Furman, Tarek Mealy, Md Shafiqul Islam +5
We introduce a glide symmetric optical waveguide exhibiting a stationary inflection point (SIP) in the Bloch wavenumber dispersion relation. An SIP is a third order exceptional poi…
Lasing at a Stationary Inflection Point
Albert Herrero-Parareda, Nathaniel Furman, Tarek Mealy +4
The concept of lasers based on the frozen mode regime in active periodic optical waveguides with a 3rd-order exceptional point of degeneracy (EPD) is advanced. The frozen mode regi…
Design of a Modified Coupled Resonators Optical Waveguide Supporting a Frozen Mode
Mohamed Y. Nada, Tarek Mealy, Md Shafiqul Islam +5
We design a three-way silicon optical waveguide with the Bloch dispersion relation supporting a stationary inflection point (SIP). The SIP is a third order exceptional point of deg…
Exceptional Points of Degeneracy with Indirect Bandgap Induced By Mixing Forward and Backward Propagating Waves
Tarek Mealy, Filippo Capolino
We demonstrate that exceptional points of degeneracy (EPDs) are obtained in two coupled waveguides without resorting to gain and loss. We show the general concept that modes result…
Degenerate Distributed Feedback Photonic Structure with Double Grating Exhibiting Degenerate Band Edge
Tarek Mealy, Filippo Capolino
We propose a degenerate version of the Bragg condition, associated to a degenerate band edge (DBE). A standard Bragg condition can be implemented using a periodic grating that oper…
Frozen mode in an asymmetric serpentine optical waveguide
Albret Herrero Parareda, Ilya Vitebksiy, Jacob Scheuer +1
The existence of a frozen mode in a periodic serpentine waveguide with broken longitudinal symmetry is demonstrated numerically. The frozen mode is associated with a stationary inf…
Force Detection of Electromagnetic Beam Chirality at the Nanoscale
Abid Anjum Sifat, Filippo Capolino, Eric O. Potma
Many nanophotonic applications require precise control and characterization of electromagnetic field properties at the nanoscale. The chiral properties of the field are among its k…
Photoinduced Magnetic Force Microscopy: Enabling Direct and Exclusive Detection of Optical Magnetism
Jinwei Zeng, Mohammad Albooyeh, Mohsen Rajaei +4
Modern optical nano-elements pursue ever-smaller sizes and individualized functionalities. Those elements that can efficiently manipulate the magnetic field of light boast promisin…
Asymmetric surface wave excitation through metasurface-edge diffraction
Miguel Camacho, Filippo Capolino, Matteo Albani
The selective excitation of localized surface wave modes remains a challenge in the design of both leaky-wave and bound-wave devices. In this Letter, we show how the truncation of…
Exceptional Point of Sixth Order Degeneracy in a Modified Coupled Resonators Optical Waveguide
Mohamed Y. Nada, Filippo Capolino
We demonstrate for the first time the occurrence of a sixth order exceptional point of degeneracy (EPD) in a realistic multimode optical photonic structure by using a modified peri…
Applications and Potentials of Reciprocal Bianisotropic Metasurfaces
Mohammad Albooyeh, Viktar Asadchy, Jinwei Zeng +2
We discuss different applications and potentials of reciprocal bianisotropic metasurfaces including uniform and gradient metasurfaces, in particular, with anisotropic, chiral, and…
Unscrambling Structured Chirality with Structured Light at Nanoscale Using Photo-induced Force
Mohammad Kamandi, Mohammad Albooyeh, Mehdi Veysi +4
We introduce a microscopy technique that facilitates the prediction of spatial features of chirality of nanoscale samples by exploiting photo-induced optical force exerted on an ac…
Two-scale structure for giant field enhancement: combination of Rayleigh anomaly and colloidal plasmonic resonance
Mahsa Darvishzadeh-Varcheie, William J. Thrift, Mohammad Kamandi +2
We demonstrate theoretically and experimentally a two-scale architecture able to achieve giant field enhancement by simultaneously exploiting both the Rayleigh anomaly and localize…
Enantio-specific Detection of Chiral Nano-Samples Using Photo-induced Force
Mohammad Kamandi, Mohammad Albooyeh, Caner Guclu +4
We propose a novel high resolution microscopy technique for enantio-specific detection of chiral samples down to sub-100 nm size, based on force measurement. We delve into the diff…
Theory of Coupled Resonator Optical Waveguides (CROW) Exhibiting High Order Exceptional Points of Degeneracy
Mohamed Y. Nada, Mohamed A. K. Othman, Filippo Capolino
We present a novel approach and a theoretical framework for generating high order exceptional points of degeneracy (EPD) in photonic structures based on periodic coupled resonators…
The degenerate band edge laser: a new paradigm for coherent light-matter interaction
Mehdi Veysi, Mohamed A. K. Othman, Alexander Figotin +1
We propose a novel class of lasers based on a fourth order exceptional point of degeneracy (EPD) referred to as the degenerate band edge (DBE). EPDs have been found in Parity-Time-…
Giant resonance and anomalous quality factor scaling in coupled resonator optical waveguides at the degenerate band edge
Mohamed Y. Nada, Mohamed A. K. Othman, Ozdal Boyraz +1
We propose a novel scheme for enhancing the quality factor of coupled resonators optical waveguides (CROWs) when operating near a degenerate band edge (DBE). A DBE is a four-mode e…
Giant Field Enhancement in Longitudinal Epsilon Near Zero Films
Mohammad Kamandi, Caner Guclu, Ting Shan Luk +2
We report that a longitudinal epsilon-near-zero (LENZ) film leads to giant field enhancement and strong radiation emission of sources in it and that these features are superior to…
Exceptional points of degeneracy and -symmetry in photonic coupled chains of scatterers
Mohamed A. K. Othman, Vincenzo Galdi, Filippo Capolino
We demonstrate the existence of exceptional points of degeneracy (EPD) of periodic eigenstates in non-Hermitian coupled chains of dipolar scatterers. Guided modes supported by thes…
Theory of Exceptional Points of Degeneracy in Uniform Coupled-Waveguides and Balance of Gain and Loss
Mohamed A. K. Othman, Filippo Capolino
We present a transmission line theory of exceptional points of degeneracy (EPD) in coupled-mode guiding structures, i.e., a theory that illustrates the characteristics of coupled e…
Photoinduced Magnetic Nanoprobe Excited by Azimuthally Polarized Vector Beam
Caner Guclu, Mehdi Veysi, Filippo Capolino
The concept of magnetic nanoprobes (or magnetic nanoantennas) providing a magnetic near-field enhancement and vanishing electric field is presented and investigated, together with…
Focused Azimuthally Polarized Vector Beam and Spatial Magnetic Resolution below the Diffraction Limit
Mehdi Veysi, Caner Guclu, Filippo Capolino
An azimuthally electric-polarized vector beam (APB), with a polarization vortex, has a salient feature that it contains a magnetic-dominant region within which electric field ideal…