期刊
OPTICS EXPRESS
卷 30, 期 25, 页码 45093-45109出版社
Optica Publishing Group
DOI: 10.1364/OE.475162
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资金
- Agence Nationale de la Recherche [ANR-18-CE47-0008]
- Conseil Regional, Ile-deFrance, DIM SIRTEQ [19P481]
- H2020 Marie Sklodowska-Curie Actions [101030421]
- H2020 Future and Emerging Technologies [899275]
- Marie Curie Actions (MSCA) [101030421] Funding Source: Marie Curie Actions (MSCA)
- Agence Nationale de la Recherche (ANR) [ANR-18-CE47-0008] Funding Source: Agence Nationale de la Recherche (ANR)
This work proposes a new type of periodic dielectric waveguide that enables strong interactions between atoms and guided photons with unusual dispersion. Through computation, the researchers demonstrate that cold Rubidium atoms can be trapped as close as 100 nm from the structure, favoring emission into guided photons.
Coupling quantum emitters and nanostructures, in particular cold atoms and optical waveguides, has recently raised a large interest due to unprecedented possibilities of engineering light-matter interactions. In this work, we propose a new type of periodic dielectric waveguide that provides strong interactions between atoms and guided photons with an unusual dispersion. We design an asymmetric comb waveguide that supports a slow mode with a quartic (instead of quadratic) dispersion and an electric field that extends far into the air cladding for an optimal interaction with atoms. We compute the optical trapping potential formed with two guided modes at frequencies detuned from the atomic transition. We show that cold Rubidium atoms can be trapped as close as 100 nm from the structure in a 1.3-mK-deep potential well. For atoms trapped at this position, the emission into guided photons is largely favored, with a beta factor as high as 0.88 and a radiative decay rate into the slow mode 10 times larger than the free-space decay rate. These figures of merit are obtained at a moderately low group velocity of c/50.(c) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
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