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Browsing Physics by Author "Liu, Ning"

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Browsing Physics by Author "Liu, Ning"

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  • Rice, Daragh; Mouras, Rabah; Gleeson, Matthew; Liu, Ning; Tofail, Syed A.M.; Soulimane, Tewfik; Silien, Christophe (American Chemical Society, 2018)
    Noble-metal nanoparticles size and packing density are critical for sensitive surface-enhanced Raman scattering (SERS) and controlled preparation of such films required to achieve reproducibility. Provided that they are ...
  • Liu, Pia; Singh, Shalini; Guo, Yina; Wang, Jian-Jun; Xu, Hongxing; Silien, Christophe; Liu, Ning; Ryan, Kevin M. (2017)
    Herein we report the formation of multi-layered arrays of vertically aligned and close packed semiconductor nanorods in perfect registry at a substrate using electric field assisted assembly. The collective properties of ...
  • Hsieh, Wen Ting; Wu, Pin Chieh; Khurgin, Jacob B.; Tsai, Din Ping; Liu, Ning; Sun, Greg (American Chemical Society, 2018)
    In the past decade or two, the field of nanophotonics has seen rapid development, empowered by introducing the concepts of plasmonics and metamaterials. The enabling feature behind this progress has been the use of noble ...
  • Kumbham, Mahendar; Daly, Susan; O'Dwyer, Kevin; Mouras, Rabah; Liu, Ning; Mani, Aladin; Peremans, André; Tofail, Syed A.M.; Silien, Christophe (Optical Society of America, 2016)
    The spatial resolution in far-field mid-infrared (λ>2.5 μm) microscopy and microspectroscopy remains limited with the full-width at half maximum of the point-spread function ca. λ/1.3; a value that is very poor in ...
  • Silien, Christophe; Liu, Ning; Hendaoui, Nordine; Tofail, Syed A.M.; Peremans, André (Optical Society of America, 2012)
    A framework is proposed for infrared (IR) absorption microscopy in the far-field with a spatial resolution below the diffraction limit. The sub-diffraction resolution is achieved by pumping a transient contrast in the ...
  • Pita, Isabel A.; Hendaoui, Nordine; Liu, Ning; Kumbham, Mahendar; Tofail, Syed A.M.; Peremans, André; Silien, Christophe (Optical Society of America, 2013)
    Although confocal infrared (IR) absorption micro-spectroscopy is well established for far-field chemical imaging, its scope remains restricted since diffraction limits the spatial resolution to values a little above half ...
  • Liu, Ning; Silien, Christophe; Sun, Greg; Corbett, Brian (Nature Research, 2018)
    The dielectric-semiconductor-dielectric-metal 4 layered structure is a well-established configuration to support TM hybrid plasmonic modes, which have demonstrated significant advantages over pure photonic modes in structures ...
  • Kumbham, Mahendar; Mouras, Rabah; Mani, Aladin; Daly, Susan; O'Dwyer, Kevin; Toma, Andrea; Bianchini, Paolo; Diaspro, Alberto; Liu, Ning; Tofail, Syed A.M.; Silien, Christophe (Optical Society of America, 2017)
    We have experimentally investigated the enhancement in spatial resolution by image subtraction in mid-infrared central solid-immersion lens (c-SIL) microscopy. The subtraction exploits a first image measured with the c-SIL ...
  • Pita, Isabel A.; Kumbham, Mahendar; Schmidt, Michael; Gleeson, Matthew; Ryan, Kevin M.; Silien, Christophe; Liu, Ning (Optical Society of America, 2018)
    The optimum geometry for waveguide propagation was determined by comparing bowtie and semicircle antenna cuts to a standard plain waveguide with a 635 nm laser. The results of both experimental data and COMSOL simulations ...

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