Waveguides with Absorbing Boundaries: Nonlinearity Controlled by an Exceptional Point and Solitons Journal Article


Author(s): Midya, Bikashkali; Konotop, Vladimir V
Article Title: Waveguides with Absorbing Boundaries: Nonlinearity Controlled by an Exceptional Point and Solitons
Affiliation IST Austria
Abstract: We reveal the existence of continuous families of guided single-mode solitons in planar waveguides with weakly nonlinear active core and absorbing boundaries. Stable propagation of TE and TM-polarized solitons is accompanied by attenuation of all other modes, i.e., the waveguide features properties of conservative and dissipative systems. If the linear spectrum of the waveguide possesses exceptional points, which occurs in the case of TM polarization, an originally focusing (defocusing) material nonlinearity may become effectively defocusing (focusing). This occurs due to the geometric phase of the carried eigenmode when the surface impedance encircles the exceptional point. In its turn, the change of the effective nonlinearity ensures the existence of dark (bright) solitons in spite of focusing (defocusing) Kerr nonlinearity of the core. The existence of an exceptional point can also result in anomalous enhancement of the effective nonlinearity. In terms of practical applications, the nonlinearity of the reported waveguide can be manipulated by controlling the properties of the absorbing cladding.
Keywords: classical optics, light propagation, transmission & absorption, nonlinear optics, nonlinear waves, solitons, interdisciplinary atomic, molecular & optical, nonlinear dynamics
Journal Title: Physical Review Letters
Volume: 119
Issue 3
ISSN: 1079-7114
Publisher: American Physical Society  
Date Published: 2017-07-18
Start Page: 033905
Copyright Statement: © 2017 American Physical Society
URL:
DOI: 10.1103/PhysRevLett.119.033905
Open access: yes (repository)