# Tailoring PT-symmetric soliton switch.

@article{Govindarajan2019TailoringPS, title={Tailoring PT-symmetric soliton switch.}, author={A. Govindarajan and Amarendra K. Sarma and M. Lakshmanan}, journal={Optics letters}, year={2019}, volume={44 3}, pages={ 663-666 } }

We theoretically demonstrate soliton steering in parity-time (PT)-symmetric coupled nonlinear dimers. We show that if the length of the PT-symmetric system is set to 2π, contrary to the conventional one that operates satisfactorily well only at the half-beat coupling length, the PT dimer remarkably yields an ideal soliton switch exhibiting almost 99.99% energy efficiency with an ultralow critical power.

#### 17 Citations

Dark soliton steering in PT-symmetric couplers with third-order and intermodal dispersions

- Physics
- 2020

We demonstrate steering dynamics of dark solitons in a parity–time (PT)-symmetric nonlinear directional coupler (NLDC) in the presence of third-order dispersion (TOD) and intermodal dispersion (IMD).… Expand

Ultrafast all-optical femtosecond soliton steering in $\mathcal{PT}$-symmetric fiber couplers

- Physics
- 2021

We report a detailed study for the first time, to the best of our knowledge, on soliton steering dynamics in a PT -symmetric directional coupler in the femtosecond domain. In this regime, the… Expand

Multifaceted dynamics and gap solitons in
PT
-symmetric periodic structures

- Mathematics, Physics
- Physical Review A
- 2019

We report the role of $\mathcal{PT}$-symmetry in switching characteristics of a highly nonlinear fiber Bragg grating (FBG) with cubic-quintic-septic nonlinearities. We demonstrate that the device… Expand

Switching dynamics in -symmetric structures with saturable cubic nonlinear response

- Physics
- 2021

In recent years, the field of -symmetry has witnessed a surge of research interest due to its ability to exploit even the losses of the system. -symmetry and its implications have been explored… Expand

Bistability and Switching in a Phase Shifted PT-Symmetric Fiber Bragg Grating

- Materials Science
- 2019 International Conference on Vision Towards Emerging Trends in Communication and Networking (ViTECoN)
- 2019

Using implicit Rungee-Kutta 4th order method, we numerically report the optical bistablity and switching exhibited by a π-phase shifted nonlinear FBG with balanced gain and loss. Every control… Expand

Nonlinear nonuniform
PT
-symmetric Bragg grating structures

- Physics
- Physical Review A
- 2019

We explore the consequences of incorporating parity and time reversal (PT ) symmetries on the dynamics of nonreciprocal light propagation exhibited by a class of nonuniform periodic structures known… Expand

Phase-shifted
PT
-symmetric periodic structures

- Physics
- 2020

We report the spectral features of a phase-shifted parity and time ($\mathcal{PT}$) symmetric fiber Bragg grating and demonstrate its functionality as a demultiplexer in the unbroken… Expand

N
-channel comb filtering and lasing in
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-symmetric superstructures

- Physics
- 2021

A comb spectrum generating device based on Bragg grating superstructures with gain and loss is suggested in this paper. The paper includes a comprehensive analysis of the device formulation and… Expand

Nonlinear anti-directional couplers with gain and loss.

- Physics, Medicine
- Optics letters
- 2019

Novel bi- and multistability states pertaining to transmitted and reflective intensities, which are controlled by the ratio of the gain and loss coefficients, and phase mismatch between the waveguides are reported. Expand

Tailoring inhomogeneous
PT
-symmetric fiber-Bragg-grating spectra

- Physics
- 2020

The unique spectral behavior exhibited by a class of non-uniform Bragg periodic structures, namely chirped and apodized fiber Bragg gratings (FBGs) influenced by parity and time reversal… Expand

#### References

SHOWING 1-10 OF 19 REFERENCES

Optical Solitons in PT Periodic Potentials

- Physics
- 2008

We investigate the effect of nonlinearity on beam dynamics in parity-time (PT) symmetric potentials. We show that a novel class of one- and two-dimensional nonlinear self-trapped modes can exist in… Expand

Unidirectional invisibility induced by PT-symmetric periodic structures.

- Physics, Medicine
- Physical review letters
- 2011

Parity-time (PT) symmetric periodic structures, near the spontaneous PT-symmetry breaking point, can act as unidirectional invisible media and the transmission coefficient and phase are indistinguishable from those expected in the absence of a grating. Expand

Stabilization of solitons in PT models with supersymmetry by periodic management

- Physics
- 2011

We introduce a system based on dual-core nonlinear waveguides with the balanced gain and loss acting separately in the cores. The system features a supersymmetry when the gain and loss are equal to… Expand

Stability of solitons in parity-time-symmetric couplers.

- Physics, Medicine
- Optics letters
- 2011

Families of analytical solutions are found for symmetric and antisymmetric solitons in a dual-core system with Kerr nonlinearity and parity-time (PT)-balanced gain and loss and a stability region is obtained in an analytical form and verified by simulations. Expand

Switching dynamics of solitons in fiber directional couplers.

- Physics, Medicine
- Optics letters
- 1993

It follows from the analysis presented that perfect soliton switching may be achieved only for the case nu(2)/kappa < pi/2. Expand

Nonlinear switching and solitons in PT-symmetric photonic systems

- Physics
- 2015

One of the challenges of the modern photonics is to develop all-optical devices enabling increased speed and energy efficiency for transmitting and processing information on an optical chip. It is… Expand

Soliton switching in fiber nonlinear directional couplers.

- Physics, Medicine
- Optics letters
- 1988

We predict all-optical switching of solitons between the two linear modes of a nonlinear coherent coupler made from a dual-core fiber operating in the anomalous dispersion regime.

Visualization of branch points in PT-symmetric waveguides.

- Physics, Medicine
- Physical review letters
- 2008

Using the Rayleigh-Schrödinger perturbation theory, it is proved that the spectrum of a PT-symmetric Hamiltonian is real as long as the radius of convergence has not been reached. Expand

Systems that becomePTsymmetric through interaction

- Physics
- 2016

In this article, we consider an interesting class of optical and other systems in which the interaction or coupling makes the systems to be $\cal{PT}$-symmetric. We aim to compare their dynamical… Expand

Parity-time–symmetric microring lasers

- Physics, Medicine
- Science
- 2014

By harnessing notions from parity-time (PT) symmetry, stable single–longitudinal mode operation can be readily achieved in a system of coupled microring lasers and the selective breaking of PT symmetry can be used to systematically enhance the maximum attainable output power in the desired mode. Expand