کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5011262 1462588 2018 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Perturbative dynamics of stationary states in nonlinear parity-time symmetric coupler
ترجمه فارسی عنوان
پویایی مضاعف کننده حالت های ثابت در متقارن متقارن زوج غیر خطی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی
We investigate the nonlinear parity-time (PT) symmetric coupler from a dynamical perspective. As opposed to linear PT-coupler where the PT threshold dictates the evolutionary characteristics of optical power in the two waveguides, in a nonlinear coupler, the PT threshold governs the existence of stationary points. We have found that the stability of the ground state undergoes a phase transition when the gain/loss coefficient is increased from zero to beyond the PT threshold. Moreover, we found that instabilities in initial conditions can lead to aperiodic oscillations as well as exponential growth and decay of optical power. At the PT threshold, we observed the existence of a stable attractor under the influence of fluctuating gain/loss coefficient. Phase plane analysis has shown us the presence of a toroidal chaotic attractor. The chaotic dynamics can be controlled by a judicious choice of the waveguide parameters.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Communications in Nonlinear Science and Numerical Simulation - Volume 57, April 2018, Pages 26-33
نویسندگان
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