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18,285 results
  • Broadband out-of-plane coupling at visible wavelengths. [Journal Article]
    Opt Lett 2019; 44(20):5089-5092Gehring H, Eich A, … Pernice WHP
  • Photonic integrated circuits require efficient interfaces to fiber optic components for applications in optical communication, computing, and sensing. Current optical interconnects rely on edge or grating couplers with limitations in terms of alignment tolerances, efficiency, and bandwidth, respectively. Here, we present a scalable coupling concept that allows fiber-to-chip coupling to the fundam…
  • High-efficiency apodized bidirectional grating coupler for perfectly vertical coupling. [Journal Article]
    Opt Lett 2019; 44(20):5081-5084Zhang Z, Chen X, … Reed GT
  • We propose and experimentally demonstrate an apodized bidirectional grating coupler for high-efficiency, perfectly vertical coupling. Through grating apodization, the coupling efficiency (CE) can be notably improved, and the parasitic reflections can be minimized. For ease of fabrication, subwavelength gratings are introduced, which are also beneficial for the coupling performance. Simulation sho…
  • Locally Resonant Phononic Crystals at Low frequencies Based on Porous SiC Multilayer. [Journal Article]
    Sci Rep 2019; 9(1):14767Mehaney A, Ahmed AM
  • In this work, a one-dimensional porous silicon carbide phononic crystal (1D-PSiC PnC) sandwiched between two rubber layers is introduced to obtain low frequency band gaps for the audible frequencies. The novelty of the proposed multilayer 1D-PnCs arises from the coupling between the soft rubber, unique mechanical properties of porous SiC materials and the local resonance phenomenon. The proposed …
  • A Noninvasive, Electromagnetic, Epidermal Sensing Device for Hemodynamics Monitoring. [Journal Article]
    IEEE Trans Biomed Circuits Syst 2019Mohammed N, Cluff K, … Loflin B
  • Non-intrusive monitoring of blood flow parameters is vital for obtaining physiological and pathophysiological information pertaining to dynamic cardiovascular events and is feasible to achieve via non-invasive, conformal, wearable technologies. Here, we present a proof-of-concept of a fully integrated, high frequency (bandwidth 40 MHz), electromagnetic sensing device for monitoring limb hemodynam…
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