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Browsing Departments Science and Engineering by Author "Kumbham, Mahendar"

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Browsing Departments Science and Engineering by Author "Kumbham, Mahendar"

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  • 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 ...
  • 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 ...
  • 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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