11 citations · 15 across the 7 of their papers we have counts for
7 papers
Chiral Terahertz Amplification and Lasing using Two-Dimensional Materials with Berry Curvature Dipole
Amin Hakimi, J. Sebastian Gomez-Diaz, Filippo Capolino
Compact, electrically driven sources of coherent terahertz (THz) radiation remain a challenge due to the lack of efficient gain media and scalable device platforms. Here, we propos…
Berry Curvature Dipole-Induced Chiral Terahertz Gain and Lasing Threshold in Bulk Tellurium
Mounes Eslami, Amin Hakimi, Luis A. Jauregui +1
We investigate the use of Berry curvature dipole in -doped Tellurium as a mechanism for achieving terahertz amplification and lasing by applying a DC electric field. When the el…
Wideband Glide-Symmetric Slow-Wave Structure for Millimeter-Wave Sheet Beam TWTs
Robert Marosi, Muhammed Zuboraj, Filippo Capolino
We introduce a slow-wave structure (SWS) for a millimeter-wave sheet-beam traveling-wave tube (TWT) with wide bandwidth. The wideband and stable operation is enabled through the to…
Super-exponential Amplification of Wavepacket Propagation in Traveling Wave Tubes
Kasra Rouhi, Filippo Capolino, Alexander Figotin
We analyze wavepacket propagation in traveling wave tubes (TWTs) analytically and numerically. TWT design in essence comprises a pencil-like electron beam in vacuum interacting wit…
Small-Signal Model for Inhomogeneous Helix Traveling-Wave Tubes using Transfer Matrices
Robert Marosi, Kasra Rouhi, Tarek Mealy +2
Abstract We introduce a practical method for modeling the small-signal behavior of frequency-dispersive and inhomogeneous helix-type traveling-wave tube (TWT) amplifiers based on a…
Chiral terahertz lasing with Berry curvature dipoles
Amin Hakimi, Kasra Rouhi, Tatiana G. Rappoport +2
Materials with Berry curvature dipoles (BDs) support a non-Hermitian electro-optic (EO) effect that is investigated here for lasing at terahertz (THz) frequencies. Such a system is…
Simple Reciprocal Electric Circuit Exhibiting Exceptional Point of Degeneracy
Kasra Rouhi, Filippo Capolino, Alexander Figotin
An exceptional point of degeneracy (EPD) occurs when both the eigenvalues and the corresponding eigenvectors of a square matrix coincide and the matrix has a nontrivial Jordan bloc…