Observation of Asymmetric Transport in Structures with Active Nonlinearities
Abbreviated Journal Title
Phys. Rev. Lett.
NON-HERMITIAN HAMILTONIANS; ALL-OPTICAL DIODE; WAVE-GUIDE; SYMMETRY; LIGHT; Physics, Multidisciplinary
A mechanism for asymmetric transport which is based on parity-time-symmetric nonlinearities is presented. We show that in contrast to the case of conservative nonlinearities, an increase of the complementary conductance strength leads to a simultaneous increase of asymmetry and transmittance intensity. We experimentally demonstrate the phenomenon using a pair of coupled Van der Pol oscillators as a reference system, each with complementary anharmonic gain and loss conductances, connected to transmission lines. An equivalent optical setup is also proposed.
Physical Review Letters
"Observation of Asymmetric Transport in Structures with Active Nonlinearities" (2013). Faculty Bibliography 2010s. 3694.