arXiv subjects

Manirupa Saha

Publications and source records attributed to Manirupa Saha.

2 recordsLinked to original sources

arXiv2012

Modulation instability in nonlinear metamaterials induced by cubic-quintic nonlinearities and higher order dispersive effects

We have investigated modulation instability in metamaterials (MM) with both cubic and quintic nonlinearities, based on a model appropriate for pulse propagation in MMs with cubic-quintic nonlinearities and higher order dispersive effects. We have included loss into account in our analysis and found that loss distorts the sidebands of the MI gain spectrum. We find that the combined effect of cubic-quintic nonlinearity increases the MI gain. The role of higher order nonlinear dispersive effects on MI has been also discussed.

physics.optics↗

arXiv2010

Modulational instability of coupled nonlinear field equations for pulse propagation in a negative index material embedded into a Kerr medium

We have investigated the modulational instability (MI) in a negative index media (NIM) using a new generalized model describing the pulse propagation in a negative index material embedded into a Kerr medium. We have found that one could control the gain of MI in a NIM by tuning the initial electric or magnetic field amplitudes . Our model successfully recovers previously proposed models to describe pulse propagation in NIMs exhibiting Kerr nonlinearity. Moreover it contains a few additional terms connecting both the electric and magnetic field envelopes in a NIM.

physics.class-ph↗