  We investigate the spontaneous emission of a two-level system, e.g. an atom
or atomlike object, coupled to a single-end, i.e., semi-infinite,
one-dimensional photonic waveguide such that one end behaves as a perfect
mirror while light can pass through the opposite end with no back-reflection.
Through a quantum microscopic model we show that such geometry can cause
non-exponential and long-lived atomic decay. Under suitable conditions, a bound
atom-photon stationary state appears in the atom-mirror interspace so as to
trap a considerable amount of initial atomic excitation. Yet, this can be
released by applying an atomic frequency shift causing a revival of photon
emission. The resilience of such effects to typical detrimental factors is
analyzed.
