Photon transport mediated by an atomic chain trapped along a photonic crystal waveguide

• Main Authors: Song, Guo-Zhu, Munro, Ewan, Nie, Wei, Kwek, Leong-Chuan, Deng, Fu-Guo, Long, Gui-Lu
• Other Authors: Interdisciplinary Graduate School (IGS)
• Format: Article
• Language: English
• Published: 2018
• Subjects: Atomic Chain; Photon; DRNTU::Science::Physics
• Online Access: https://hdl.handle.net/10356/89186; http://hdl.handle.net/10220/46131
• Institution: Nanyang Technological University

We theoretically investigate the transport properties of a weak coherent input field scattered by an ensemble of Λ-type atoms coupled to a one-dimensional photonic crystal waveguide. In our model, the atoms are randomly located in the lattice along the crystal axis. We analyze the transmission spectrum mediated by the tunable long-range atomic interactions and observe the highest-energy dip. The results show that the highest-energy dip location is associated with the number of the atoms, which provides an accurate measuring tool for the emitter-waveguide system. We also quantify the influence of a Gaussian inhomogeneous broadening and the dephasing on the transmission spectrum, concluding that the highest-energy dip is immune to both the inhomogeneous broadening and the dephasing. Furthermore, we study photon-photon correlations of the reflected field and observe quantum beats. With tremendous progress in coupling atoms to photonic crystal waveguides, our results may be experimentally realizable in the near future.