101 citations · 870 across the 32 of their papers we have counts for
12 papers · 1 filter
Topological directed amplification
Bikashkali Midya
A phenomenon of topological directed amplification of certain initial perturbations is revealed theoretically to emerge in a class of asymptotically stable skin-effect lattices des…
Non-Hermitian heterostructure for two-parameter sensing
Jieun Yim, Han Zhao, Bikashkali Midya +1
Non-Hermitian systems at the exceptional point (EP) degeneracy are demonstrated to be highly sensitive to environmental perturbation. Here, we propose and theoretically investigate…
Supersymmetric microring laser arrays
Bikashkali Midya, Han Zhao, Xingdu Qiao +5
Coherent combination of emission power from an array of coupled semiconductor lasers operating on the same chip is of fundamental and technological importance. In general, the nonl…
Continuous supersymmetric transformation for photonic design
Wiktor Walasik, Nitish Chandra, Bikashkali Midya +2
We propose to use a continuous supersymmetric (SUSY) transformation of a dielectric permittivity profile in order to design a photonic mode sorter. The iso-spectrality of the SUSY…
Topological multiband photonic superlattices
Bikashkali Midya, Liang Feng
A one-dimensional discrete lattice of dimers is known to possess topologically protected edge states when interdimer coupling is stronger than intradimer coupling. Here, we address…
Supercharge optical arrays
Bikashkali Midya, Wiktor Walasik, Natalia M. Litchinitser +1
We introduce the notion of a supercharge optical array synthesized according to supersymmetric charge operators. Starting from an arbitrary array, mathematical supersymmetry transf…
Supersymmetry-guided method for mode selection and optimization in coupled systems
Wiktor Walasik, Bikashkali Midya, Liang Feng +1
Single-mode operation of coupled systems such as optical-fiber bundles, lattices of photonic waveguides, or laser arrays requires an efficient method to suppress unwanted super-mod…
Coherent-perfect-absorber and laser for bound states in a continuum
Bikashkali Midya, Vladimir V. Konotop
It is shown that two fundamentally different phenomena, the bound states in continuum and the spectral singularity (or time-reversed spectral singularity), can occur simultaneously…
Waveguides with Absorbing Boundaries: Nonlinearity Controlled by an Exceptional Point and Solitons
Bikashkali Midya, Vladimir V. Konotop
We reveal the existence of continuous families of guided single-mode solitons in planar waveguides with weakly nonlinear active core and absorbing boundaries. Stable propagation of…
Modes and exceptional points in waveguides with impedance boundary conditions
Bikashkali Midya, Vladimir V. Konotop
A planar waveguide with impedance boundary, composed of non-perfect metallic plates, and with passive or active dielectric filling is considered. We show the possibility of selecti…
Supersymmetry generated one-way invisible PT-symmetric optical crystals
Bikashkali Midya
We use supersymmetry transformations to design transparent and one-way reflectionless (thus unidirectionally invisible) complex crystals with balanced gain and loss profiles. The s…
Nonlinear localized modes in PT-symmetric optical media with competing gain and loss
Bikashkali Midya, Rajkumar Roychoudhury
The existence and stability of the nonlinear spatial localized modes are investigated in parity-time symmetric optical media characterized by a generic complex hyperbolic refractiv…