Exceptional points and asymmetric mode conversion in quasi-guided dual-mode optical waveguides.
Somnath Ghosh,Yidong Chong +1 more
TLDR
A non-Hermitian system consisting of 1D planar optical waveguides with suitable amount of simultaneous gain and loss is studied, which can be explained by the swapping of mode identities in the vicinity of the exceptional point, together with the failure of adiabatic evolution in non- hermitian systems.Abstract:
Non-Hermitian systems host unconventional physical effects that be used to design new optical devices. We study a non-Hermitian system consisting of 1D planar optical waveguides with suitable amount of simultaneous gain and loss. The parameter space contains an exceptional point, which can be accessed by varying the transverse gain and loss profile. When light propagates through the waveguide structure, the output mode is independent of the choice of input mode. This “asymmetric mode conversion” phenomenon can be explained by the swapping of mode identities in the vicinity of the exceptional point, together with the failure of adiabatic evolution in non-Hermitian systems.read more
Citations
More filters
Journal ArticleDOI
Exceptional points in optics and photonics.
TL;DR: The topic of exceptional points in photonics is reviewed and some of the possible exotic behavior that might be expected from engineering such systems are explored, as well as new angle of utilizing gain and loss as new degrees of freedom, in stark contrast with the traditional approach of avoiding these elements.
Journal ArticleDOI
Non-Hermitian Physics
TL;DR: In this article, a review of non-Hermitian classical and quantum physics can be found, with an overview of how diverse classical systems, ranging from photonics, mechanics, electrical circuits, acoustics to active matter, can be used to simulate non-hermitian wave physics.
Journal ArticleDOI
Topological states of non-Hermitian systems
TL;DR: Recently, the search for topological states of matter has turned to non-Hermitian systems, which exhibit a rich variety of unique properties without Hermitian counterparts as discussed by the authors.
Proceedings Article
Optical solitons in PT periodic potentials
TL;DR: It is shown that new types of nonlinear self-trapped modes can exist in optical PT synthetic lattices.
Journal ArticleDOI
Dynamically Encircling Exceptional Points: In situ Control of Encircling Loops and the Role of the Starting Point
TL;DR: In this paper, a new experimental platform allows for studying the dynamical encircling of exceptional points, where the trajectory can be tuned in situ, and experiments reveal nonchiral dynamics when the starting point of the loop is in the parity-time-broken phase.
References
More filters
Book
Nonlinear Fiber Optics
TL;DR: The field of nonlinear fiber optics has advanced enough that a whole book was devoted to it as discussed by the authors, which has been translated into Chinese, Japanese, and Russian languages, attesting to the worldwide activity in the field.
Journal ArticleDOI
Real Spectra in Non-Hermitian Hamiltonians Having PT Symmetry
TL;DR: The condition of self-adjointness as discussed by the authors ensures that the eigenvalues of a Hamiltonian are real and bounded below, replacing this condition by the weaker condition of $\mathrm{PT}$ symmetry, one obtains new infinite classes of complex Hamiltonians whose spectra are also real and positive.
Journal ArticleDOI
Observation of parity–time symmetry in optics
Christian E. Rüter,Konstantinos G. Makris,Ramy El-Ganainy,Demetrios N. Christodoulides,Mordechai Segev,Detlef Kip +5 more
TL;DR: In this paper, the authors report the first observation of the behaviour of a PT optical coupled system that judiciously involves a complex index potential, and observe both spontaneous PT symmetry breaking and power oscillations violating left-right symmetry.
Journal ArticleDOI
Observation of PT-Symmetry Breaking in Complex Optical Potentials
A. Guo,Gregory J. Salamo,David Duchesne,Roberto Morandotti,M. Volatier-Ravat,Vincent Aimez,Georgios A. Siviloglou,Demetrios N. Christodoulides +7 more
TL;DR: This work demonstrates experimentally passive PT-symmetry breaking within the realm of optics, which leads to a loss induced optical transparency in specially designed pseudo-Hermitian guiding potentials.
Nonlinear Fiber Optics
TL;DR: The field of nonlinear fiber optics has advanced enough that a whole book was devoted to it as discussed by the authors, which has been translated into Chinese, Japanese, and Russian languages, attesting to the worldwide activity in the field.