  To go beyond quantum optics in free-space setups, atom-light interfaces with
structured photonic environments are often employed to realize unconventional
quantum electrodynamics (QED) phenomena. However, when employed as quantum
buses, those long-distance nanostructures are limited by fabrication disorders.
In this work, we alternatively propose to realize structured lightmatter
interactions by engineering multiple coupling points of hybrid giant
atom-conventionalenvironments without any periodic structure. We present a
generic optimization method to obtain the real-space coupling sequence for
multiple coupling points. We report a broadband chiral emission in a very wide
frequency regime, with no analog in other quantum setups. Moreover, we show
that the QED phenomena in the band gap environment, such as fractional atomic
decay and dipole-dipole interactions mediated by a bound state, can be observed
in our setup. Numerical results indicate that our proposal is robust against
fabrication disorders of the coupling sequence. Our work opens up a new route
for realizing unconventional light-matter interactions.
