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Title: | Optical properties of an atomic ensemble coupled to a band edge of a photonic crystal waveguide | Authors: | Munro, E Kwek, L.C Chang, D.E |
Keywords: | Atoms Laser optics Optical waveguides Photonic crystals Waveguide components Waveguides Atomic ensemble Collective excitations Dipole dipole interactions Long range interactions Multiple transmission Nonlinear optical behavior Photonic crystal waveguide Transmission spectrums Optical properties |
Issue Date: | 2017 | Publisher: | Institute of Physics Publishing | Citation: | Munro, E, Kwek, L.C, Chang, D.E (2017). Optical properties of an atomic ensemble coupled to a band edge of a photonic crystal waveguide. New Journal of Physics 19 (8) : 83018. ScholarBank@NUS Repository. https://doi.org/10.1088/1367-2630/aa7fad | Abstract: | We study the optical properties of an ensemble of two-level atoms coupled to a 1D photonic crystal waveguide (PCW), which mediates long-range coherent dipole-dipole interactions between the atoms. We show that the long-range interactions can dramatically alter the linear and nonlinear optical behavior, as compared to a typical atomic ensemble. In particular, in the linear regime, we find that the transmission spectrum contains multiple transmission dips, whose properties we characterize. Moreover, we show how the linear spectrum may be used to infer the number of atoms present in the system, constituting an important experimental tool in a regime where techniques for conventional ensembles break down. We also show that some of the transmission dips are associated with an effective 'two-level' resonance that forms due to the long-range interactions. In particular, under strong global driving and appropriate conditions, we find that the atomic ensemble is only capable of absorbing and emitting single collective excitations at a time. Our results are of direct relevance to atom-PCW experiments that should soon be realizable. © 2017 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. | Source Title: | New Journal of Physics | URI: | https://scholarbank.nus.edu.sg/handle/10635/175154 | ISSN: | 1367-2630 | DOI: | 10.1088/1367-2630/aa7fad |
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