TY - JOUR
T1 - Nonreciprocal transport of exciton polaritons in a non-Hermitian chain
AU - Mandal, S.
AU - Banerjee, R.
AU - Ostrovskaya, Elena A.
AU - Liew, T. C.H.
N1 - Publisher Copyright:
© 2020 American Physical Society.
PY - 2020/9
Y1 - 2020/9
N2 - We consider exciton polaritons in a zigzag chain of coupled elliptical micropillars subjected to incoherent excitation. The driven-dissipative nature of the system along with the naturally present polarization splitting inside the pillars gives rise to nonreciprocal dynamics, which eventually leads to the non-Hermitian skin effect, where all the modes of the system collapse to one edge. As a result, the polaritons propagate only in one direction along the chain, independent of the excitation position, and the propagation in the opposite direction is suppressed. The system shows robustness against disorder and, using the bistable nature of polaritons to encode information, we show one-way information transfer. This paves the way for compact and robust feedback-free one-dimensional polariton transmission channels without the need for external magnetic field, which are compatible with proposals for polaritonic circuits.
AB - We consider exciton polaritons in a zigzag chain of coupled elliptical micropillars subjected to incoherent excitation. The driven-dissipative nature of the system along with the naturally present polarization splitting inside the pillars gives rise to nonreciprocal dynamics, which eventually leads to the non-Hermitian skin effect, where all the modes of the system collapse to one edge. As a result, the polaritons propagate only in one direction along the chain, independent of the excitation position, and the propagation in the opposite direction is suppressed. The system shows robustness against disorder and, using the bistable nature of polaritons to encode information, we show one-way information transfer. This paves the way for compact and robust feedback-free one-dimensional polariton transmission channels without the need for external magnetic field, which are compatible with proposals for polaritonic circuits.
UR - http://www.scopus.com/inward/record.url?scp=85092371671&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.125.123902
DO - 10.1103/PhysRevLett.125.123902
M3 - Article
SN - 0031-9007
VL - 125
JO - Physical Review Letters
JF - Physical Review Letters
IS - 12
M1 - 123902
ER -