21 research outputs found

    Hybrid quantum nanophotonic devices for coupling to rare-earth ions

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    Gallium arsenide photonic crystal resonators are designed and fabricated for evanescent coupling to localized ensembles of rare-earth ions in crystalline hosts. These devices will enable nano-scale on-chip optical quantum memories

    Towards coupling rare earth ions to a Y_2SiO_5 nanophotonic resonator

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    An yttrium orthosilicate nanophotonic resonator is fabricated with resonances near the ^4I_(9/2)-^4F_(3/2) hyperfine transition of Neodymium ions. Measured absorption by Neodymium embedded in a nanobeam indicates promising prospect for coupling ions to our nano-resonator

    Central pathways causing fatigue in neuro-inflammatory and autoimmune illnesses

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    A review of the anthropogenic influence on biogenic secondary organic aerosol

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    Because of the climate and air quality effects of organic aerosol, it is important to quantify the influence of anthropogenic emissions on the aerosol burden, both globally and regionally, and both in terms of mass and number. Methods exist with which the fractions of organic aerosol resulting directly from anthropogenic and biogenic processes can be estimated. However, anthropogenic emissions can also lead to an enhancement in secondary organic aerosol formation from naturally emitted precursors. We term this enhanced biogenic secondary organic aerosol (eBSOA). Here, we review the mechanisms through which such an effect may occur in the atmosphere and describe a work flow via which it may be quantified, using existing measurement techniques. An examination of published data reveals support for the existence of the enhancement effect.ISSN:1680-7375ISSN:1680-736