874 citations · 2k across the 14 of their papers we have counts for
14 papers
Enhanced Signal-to-Noise Performance of EP-based Electromechanical Accelerometers
Rodion Kononchuk, Jizhe Cai, Fred Ellis +2
Exceptional points (EP) are non-Hermitian spectral degeneracies where both eigenvalues and their corresponding eigenvectors coalesce. Recently, EPs have attracted a lot of attentio…
Environmentally-induced exceptional points in elastodynamics
V. Dominguez-Rocha, Ramathasan Thevamaran, F. M. Ellis +1
We study the nature of an environment-induced exceptional point in a non-Hermitian pair of coupled mechanical oscillators. The mechanical oscillators are a pair of pillars carved o…
Adiabatic Thermal Radiation Pumps for Thermal Photonics
Huanan Li, Lucas J. Fernández-Alcázar, Fred Ellis +2
We control the direction and magnitude of thermal radiation, between two bodies at equal temperature (in thermal equilibrium), by invoking the concept of adiabatic pumping. Specifi…
Experimental realization of Floquet PT-symmetric systems
Mahboobeh Chitsazi, Huanan Li, F. M. Ellis +1
We provide an experimental framework where periodically driven PT-symmetric systems can be investigated. The set-up, consisting of two UHF oscillators coupled by a time-dependent c…
Self-Regulated Transport in Photonic Crystals with Phase-Changing Defects
Roney Thomas, Fred M. Ellis, Ilya Vitebsky +1
Phase changing materials (PCM) are widely used for optical data recording, sensing, all-optical switching, and optical limiting. Our focus here is on the case when the change in th…
Giant Non-reciprocity Near Exceptional Point Degeneracies
Roney Thomas, Huanan Li, F. M. Ellis +1
We show that gyrotropic structures with balanced gain and loss that respect anti-linear symmetries exhibit a giant non-reciprocity at the so-called exact phase where the eigenfrequ…
Wavepacket Self-imaging and Giant Recombinations via Stable Bloch-Zener Oscillations in Photonic Lattices with Local -Symmetry
N. Bender, H. Li, F. M. Ellis +1
We propose a family of {\it local} -symmetric photonic lattices with transverse index gradient , where the emergence of {\it stable} Bloch-Zener oscillations are contr…
Experimental Observation of Stabilization and Lasing Death via Asymmetric Gain
M. Chitsazi, S. Factor, J. Schindler +3
Using a pair of coupled LRC cavities we experimentally demonstrate that instabilities and amplification action can be tamed by a spatially inhomogenous gain. Specifically we observ…
Perfect Impedance-Matched Isolators and Unidirectional Absorbers
J. M. Lee, Z. Lin, H. Ramezani +4
A broad-band reflectionless channel which supports unidirectional wave propagation originating from the interplay between gyrotropic elements and symmetrically placed gain and loss…
Observation of Asymmetric Transport in Structures with Active Nonlinearities
N. Bender, S. Factor, J. D. Bodyfelt +3
A mechanism for asymmetric transport based on the interplay between the fundamental symmetries of parity (P) and time (T) with nonlinearity is presented. We experimentally demonstr…
PT-Symmetric Electronics
J. Schindler, Z. Lin, J. M. Lee +3
We show both theoretically and experimentally that a pair of inductively coupled active LRC circuits (dimer), one with amplification and another with an equivalent amount of attenu…
Experimental observation of the dual behavior of -symmetric scattering
Zin Lin, Joseph Schindler, Fred M. Ellis +1
We investigate experimentally parity-time () symmetric scattering using circuits in an inductively coupled - symmetric pair connected to transmission li…
Bypassing the bandwidth theorem with PT symmetry
Hamidreza Ramezani, J. Schindler, F. M. Ellis +2
The beat time τ_{fpt} associated with the energy transfer between two coupled oscillators is dictated by the bandwidth theorem which sets a lower bound τ_{fpt}\sim 1/δω. We show, b…
Experimental Study of Active LRC Circuits with PT-Symmetries
Joseph Schindler, Ang Li, Mei C. Zheng +2
Mutually coupled modes of a pair of active LRC circuits, one with amplification and another with an equivalent amount of attenuation, provide an experimental realization of a wide…