Single-photon manipulations based on optically-controlled chiral couplings in waveguide structures of Rydberg giant atoms
arxiv(2023)
摘要
Two interacting Rydberg atoms coupled to a waveguide realize a giant-atom
platform that exhibits the controllable (phase-dependent) chirality where the
direction of nonreciprocal photon scattering can be switched on demand, e.g.,
by the geometrical tuning of an external driving field. At variance with
previous chiral setups, the simplified approach of our proposed platform arises
from an optical implementation of the local phase difference between two
coupling points of the Rydberg giant atom. Furthermore, employing two or more
driving fields, this platform could also be used as a frequency converter with
its efficiency exhibiting a strong asymmetry and being significantly enhanced
via the chiral couplings. Our results suggest an extendable giant-atom platform
that is both innovative and promising for chiral quantum optics and tunable
frequency conversion in the optical domain.
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