Optical embodiments of Rabi splitting based in photonic integrated
waveguide-coupled resonators
Abstract
Realizing optical analogues of quantum phenomena in atomic, molecular,
or condensed matter physics has underpinned a range of photonic
technologies. Rabi splitting is a quantum phenomenon induced by a strong
interaction between two quantum states, and its optical analogues are of
fundamental importance for the manipulation of light-matter interactions
with wide applications in optoelectronics and nonlinear optics. Here, we
propose and theoretically investigate purely optical analogues of Rabi
splitting in integrated waveguide-coupled resonators formed by two
Sagnac interferometers. By tailoring the coherent mode interference, the
spectral response of the devices is engineered to achieve optical
analogues of Rabi splitting with anti-crossing behavior in the
resonances. Transitions between the Lorentzian, Fano, and Rabi splitting
spectral lineshapes are achieved by simply changing the phase shift
along the waveguide connecting the two Sagnac interferometers, revealing
interesting physical insights about the evolution of different optical
analogues of quantum phenomena. The impact of the device structural
parameters is also analyzed to facilitate device design and
optimization. These results suggest a new way for realizing optical
analogues of Rabi splitting based on integrated waveguide-coupled
resonators, paving the way for many potential applications that
manipulate light-matter interactions in the strong coupling regime.