33 citations · 250 across the 26 of their papers we have counts for
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Modulational instability in -symmetric Bragg grating structures with saturable nonlinearity
K. Tamilselvan, A. Govindarajan, I. Inbavalli +2
We investigate the nontrivial characteristics of modulational instability (MI) in a system of Bragg gratings with saturable nonlinearity. We also introduce an equal amount of gain…
Modulational instability in non-Kerr photonic Lieb lattice with metamaterials
A. K. Shafeeque Ali, Andrei I. Maimistov, K. Porsezian +2
We present an analysis of modulational instability of diffractionless waves in a face-centered square lattice of waveguides featuring non-Kerr nonlinearity, which are constituted b…
Reviving Modulational Instability with Third-Order Dispersion
K. Tamilselvan, A. Govindarajan, T. Kanna +2
It is well-known that third-order dispersion (TOD) never allows the continuous wave of any nonlinear Schroedinger (NLS) type system to experience modulational instability (MI). Rem…
On the integrability aspects of nonparaxial nonlinear Schrödinger equation and the dynamics of solitary waves
K. Tamilselvan, T. Kanna, A. Govindarajan
The integrability nature of a nonparaxial nonlinear Schrödinger (NNLS) equation, describing the propagation of ultra-broad nonparaxial beams in a planar optical waveguide, is studi…
Non-Lagrangian approach for coupled complex Ginzburg-Landau systems with higher order-dispersion
Roger Bertin Djob, Aurelien Kenfact-Jiotsa, A. Govindarajan
It is known that after a particular distance of evolution in fiber lasers, two (input) asymmetric soliton like pulses emerge as two (output) symmetric pulses having same and consta…
Nonlinear nonuniform -symmetric Bragg grating structures
S. Vignesh Raja, A. Govindarajan, A. Mahalingam +1
We explore the consequences of incorporating parity and time reversal () symmetries on the dynamics of nonreciprocal light propagation exhibited by a class of nonunif…
Multifaceted dynamics and gap solitons in -symmetric periodic structures
S. Vignesh Raja, A. Govindarajan, A. Mahalingam +1
We report the role of -symmetry in switching characteristics of a highly nonlinear fiber Bragg grating (FBG) with cubic-quintic-septic nonlinearities. We demonstrate…
Nonlinear anti-directional couplers with gain and loss
A. Govindarajan, Boris A. Malomed, M. Lakshmanan
Following the concept of -symmetric couplers, we propose a linearly coupled system of nonlinear waveguides, made of positive- and negative-index materials, which carr…
Cubic-quintic nonlinear Helmholtz equation: Modulational instability, chirped elliptic and solitary waves
K. Tamilselvan, T. Kanna, A. Govindarajan
We study the formation and propagation of chirped elliptic and solitary waves in cubic-quintic nonlinear Helmholtz (CQNLH) equation. This system describes nonparaxial pulse propaga…
Tailoring -symmetric soliton switch
A. Govindarajan, Amarendra K. Sarma, M. Lakshmanan
We theoretically demonstrate soliton steering in -symmetric coupled nonlinear dimers. We show that if the length of the -symmetric system is set to …
Modulational Instability in Linearly Coupled Asymmetric Dual-Core Fibers
A. Govindarajan, Boris A. Malomed, A. Mahalingam +1
We investigate modulational instability (MI) in asymmetric dual-core nonlinear directional couplers incorporating the effects of the differences in effective mode areas and group v…