Phase-modulated Autler-Townes splitting in a giant-atom system within waveguide QED

The nonlocal emitter-waveguide coupling, which gives birth to the so called giant atom, represents a new paradigm in field of quantum optics and waveguide QED. We investigate single-photon scattering one-dimensional on two-level or three-level atom. Thanks natural interference induced by back forth photon transmitted/reflected between atom-waveguide coupling points, transmission can be dynamically controlled periodic phase modulation via adjusting size For giant-atom setup, we demonstrate energy shift is dependent atomic size. driven it great interest that, Autler-Townes splitting dramatically modulated width valleys (reflection range) tunable terms Our investigation will beneficial phonon control network based mesoscopical even macroscopical nodes involving