33 citations · 186 across the 22 of their papers we have counts for
22 papers
Spatial beam dynamics in graded-index multimode fibers under Raman amplification:a variational approach
Ashis Paul, Anuj P. Lara, Samudra Roy +1
We investigate the spatial beam dynamics inside a multimode graded-index fiber under Raman amplification by adopting a semi-analytical variational approach. The variational analysi…
Collision dynamics of discrete soliton in uniform waveguide arrays
Anuj P. Lara, Samudra Roy
We investigate the collision dynamics of discrete soliton (DS) pair in a realistic semi-infinite nonlinear waveguide array (WA) in the context of \textit{diffractive resonant radia…
Spatial dissipative solitons in graphene-based active random metamaterials
Ashis Paul, Andrea Marini, Samudra Roy
We investigate dissipative nonlinear dynamics in graphene-based active metamaterials composed of randomly dispersed graphene nano-flakes embedded within an externally pumped gain m…
Free-carrier-induced nonlinear dynamics in hybrid graphene-based photonic waveguides
Ambaresh Sahoo, Andrea Marini, Samudra Roy
We develop from first principles a theoretical model for infrared pulse propagation in graphene-covered hybrid waveguides. We model electron dynamics in graphene by Bloch equations…
Intra-cavity field dynamics near avoided mode crossing in concentric silicon nitride ring resonator
Maitrayee Saha, Samudra Roy, Shailendra K. Varshney
Understanding the intra-cavity field dynamics in passive microresonator systems has already been intriguing. It becomes fascinating when the system is complex, such as a concentric…
Dynamic diffractive resonant radiation in a linearly chirped nonlinear waveguide array
Anuj P. Lara, Samudra Roy
We theoretically and numerically investigate the evolution of discrete soliton in a 1D linearly chirped nonlinear waveguide array (WA). The discrete soliton is self-accelerated ins…