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  • NRN113 Three-Dimensional All-Dielectric Metamaterial Solid Immersion Lens for Subwavelength Imaging at Visible Frequencies

    Science Advances

    • Sensors and Devices, 
    • Knowledge Transfer

    We develop a new “nano–solid-fluid assembly” method using 15-nm TiO2 nanoparticles as building blocks to fabricate the first three-dimensional (3D) all-dielectric metamaterial at visible frequencies. Because of its optical transparency, high refractive index, and deep-subwavelength structures, this 3D all-dielectric metamaterial-based solid immersion lens (mSIL) can produce a sharp image with a super-resolution of at least 45 nm under a white-light optical microscope...

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  • NRN113 - Dielectric Metamaterial Superlens with 45 mm Resolution in Visible

    Science Advances

    • Sensors and Devices, 
    • Knowledge Transfer

    We develop a new “nano–solid-fluid assembly” method using 15-nm TiO2 nanoparticles as building blocks to fabricate the first three-dimensional (3D) all-dielectric metamaterial at visible frequencies. Because of its optical transparency, high refractive index, and deep-subwavelength structures, this 3D all-dielectric metamaterial-based solid immersion lens (mSIL) can produce a sharp image with a super-resolution of at least 45 nm under a white-light optical microscope, significantly exceeding the classical diffraction limit and previous near-field imaging techniques.

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  • NRN147 - Improved Performance Robustness of DSP-Enabled Flexible ROADMs Free from Optical Filters and O-E-O Conversions

    Journal of Optical Communications and Networking

    • Sensors and Devices, 
    • Modelling

    In this paper, the ROADM performance robustness against variations in numerous network design aspects is, for the first time to the best of our knowledge, extensively explored in intensity-modulation- and direct-detection-based optical network nodes.

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  • NRN158 - Concealment of Time-Delay Chaos Signature in Three-Cascaded Vertical-Cavity Surface-Emitting Lasers

    IEEE Xplore

    • Sensors and Devices

    The time-delay signature and the chaos bandwidth in three-cascaded vertical-cavity surface-emitting lasers have been investigated experimentally. A peak value of autocorrelation coefficient at the feedback round trip time and the ratio between this peak value and its background are used to quantitatively identify the time-delay (TD) signature of chaos. A new concept-peak to side-peak ratio is introduced for better quantification of the TD signature concealment. The peak to side-peak ratio is defined as the ratio between the peak value of autocorrelation coefficient at the TD and the peak value at a delay time other than the TD and zero delay time. Three injection cases, namely, small bandwidth, intermediate bandwidth, and wide bandwidth of the injecting chaos signals, have been used to study the effect of the bandwidth of the injecting chaos on the TD concealment. The experimental results show that the time-delay signature can be totally concealed in the slave laser subject to the intermediate bandwidth of chaotic optical injection over a wide frequency detuning range.

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  • NRN045 - External Optical Feedback Effects

    • Sensors and Devices

    The purpose of this paper is to explore theoretically the impact of external optical feedback level in semiconductor metal-clad nanolasers using, where possible, experimental parameters

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