157 citations · 1.1k across the 83 of their papers we have counts for
6 papers · 2 filters
Nonlinear Parity-Time (PT) symmetric closed-form optical quadrimer waveguides: Attractor perspective
Samit Kumar Gupta, Jyoti Prasad Deka, Amarendra K. Sarma
We report a study on a closed-form nonlinear parity-time symmetric optical quadrimer waveguides system with a specific coupling scheme. The system yields power saturation behavior…
Optical trap potential control in N-type four level atoms by femtosecond Gaussian pulses
Subhadeep Chakraborty, Amarendra K. Sarma
In this work we present a scheme to control the optical dipole trap potential in an N-type four-level atomic system by using chirped femtosecond Gaussian pulses. The spatial size o…
Modulation instability in nonlinear complex parity-time (PT) symmetric periodic structures
Amarendra K. Sarma
We carry out a modulation instability (MI) analysis in nonlinear complex parity-time (PT) symmetric periodic structures. All the three regimes defined by the PT-symmetry breaking p…
Coherent manipulation of four-level double lambda-like atomic system by a train of ultra-short few-cycle-optical pulses
Pawan Kumar, Amarendra K. Sarma
We have demonstrated that near complete coherence can be achieved in a four level double lambda-like systems using a train of ultra-short optical pulses. The effect of the Doppler…
Few-cycle optical solitary waves in cascaded-quadratic-cubic-quintic nonlinear media
Kanchan Kumar De, Amit Goyal, C. N. Kumar +1
We study the propagation of few-cycle optical solitary waves in a nonlinear media under the combined action of quadratic, cubic and quintic nonlinearities in a large phase-mismatch…
Solitary waves in Parity-time (PT) symmetric Bragg-grating structure and the existence of Optical Rogue Waves
Samit Kumar Gupta, Amarendra K. Sarma
In this work, we have studied the traveling wave solution in a nonlinear Bragg grating structure in which the core of the optical fiber is having Parity-time (PT) symmetric refract…