Researcher:
Murib, Mohammed Sharif

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PhD Student

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Mohammed Sharif

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Murib

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Murib, Mohammed Sharif

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2009 - 200942010 - 20185

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Researcher Of Publications: search.filters.isAuthorOfPublication.9f8f1a1f-00f3-4693-afe8-9a53aec91098

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Now showing 1 - 9 of 9
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    Ruby microsphere and liquid cyrstal based tunable optical filter
    (Ieee, 2009) Beccherelli, Romeo; Department of Physics; N/A; N/A; Serpengüzel, Ali; Murib, Mohammed Sharif; Hüseyinoğlu, Ersin; Faculty Member; PhD Student; Master Student; Department of Physics; College of Sciences; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; 27855; N/A
    A microsphere placed in a liquid crystal is used as an optical filter. By changing the refractive index of the liquid cyrstal, the resonance frequency of the sphere is controlled.
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    Silicon microspheres for optical modulation applications
    (SPIE-Soc Photoptical Instrumentation Engineers, 2009) Gürlü, Oǧuzhan; Department of Physics; Department of Physics; Department of Physics; Serpengüzel, Ali; Yüce, Emre; Murib, Mohammed Sharif; Faculty Member; Master Student; Master Student; Department of Physics; College of Sciences; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; 27855; 245435; N/A
    A silicon microsphere coupled to a silica optical fiber half coupler is excited using a diode laser operating at 1.55 μm. The transmitted and the 90o elastically scattered light signals are modulated with an electrical square wave applied to the silicon microsphere.
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    Polarization behavior of elastic scattering from a silicon microsphere coupled to an optical fiber
    (Optical Soc Amer, 2014) Gürlü, Oğuzhan; N/A; N/A; Department of Physics; Murib, Mohammed Sharif; Yüce, Emre; Serpengüzel, Ali; PhD Student; Master Student; Faculty Member; Department of Physics; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; College of Sciences; N/A; 245435; 27855
    The polarization behavior of elastic scattering at 1473 nm is analyzed from a silicon microsphere on an optical fiber half-coupler. The 0.27 nm angular mode spacing of the resonances correlates well with the optical size of the silicon sphere. The spectral linewidths of the resonances are on the order of 10(-3) nm, which corresponds to quality factors on the order of 10(6). The transverse magnetically polarized elastic scattering signal has higher resonance to modulation depth and background ratio than the transverse electrically polarized elastic scattering signal and is suitable for high-resolution optical filtering applications such as optical monitoring and sensing.
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    Electrooptical tuning of a ruby microsphere morphology dependent resonance in a liquid crystal medium
    (IEEE, 2009) Beccherelli, Romeo; N/A; N/A; Department of Physics; Webb, Kurt David; Murib, Mohammed Sharif; Serpengüzel, Ali; Master Student; Master Student; Faculty Member; Department of Physics; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; College of Sciences; N/A; N/A; 27855
    A simulation describing the shifts in resonant peaks of scattered light from a waveguide coupled microsphere resonator immersed in nematic liquid crystal is discussed.
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    Silicon microspheres for optoelectronics
    (IEEE, 2011) Department of Physics; Serpengüzel, Ali; Murib, Mohammed Sharif; Yılmaz, Huzeyfe; Faculty Member; PhD Student; Master Student; Department of Physics; College of Sciences; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; 27855; N/A; N/A
    Optoelectronic properties of silicon microspheres are explored. The IV characteristics show an electrical response similar to two back-to-back Schottky diodes. Optical resonances with Q-factors of 105 are observable in the elastic scattering spectra.
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    Fiber optic excitation of silicon microspheres in amorphous and crystalline fluids
    (Taylor and Francis Inc, 2016) N/A; N/A; N/A; Department of Physics; Yılmaz, Huzeyfe; Yılmaz, Hasan; Murib, Mohammed Sharif; Serpengüzel, Ali; Master Student; N/A; PhD Student; Faculty Member; Department of Physics; Graduate School of Sciences and Engineering; N/A; Graduate School of Sciences and Engineering; College of Sciences; N/A; N/A; N/A; 27855
    This study investigates the optical resonance spectra of free-standing monolithic single crystal silicon microspheres immersed in various amorphous fluids, such as air, water, ethylene glycol, and 4-Cyano-4'-pentylbiphenyl nematic liquid crystal. For the various amorphous fluids, morphology-dependent resonances with quality factors on the order of 10(5) are observed at 1428 nm. The mode spacing is always on the order of 0.23 nm. The immersion in various amorphous fluids affects the spectral response of the silicon microsphere and heralds this technique for use in novel optofluidics applications. Even though the nematic liquid crystal is a highly birefringent, scattering, and high-index optical medium, morphology-dependent resonances with quality factors on the order of 10(5) are observed at 1300 nm in the elastic scattering spectra of the silicon microsphere, realizing a liquid-crystal-on-silicon geometry. The relative refractive index and the size parameter of the silicon microsphere are the parameters that affect the resonance structure. The more 4-Cyano-4'-pentylbiphenyl interacting with the silicon microsphere, the lower the quality factor of the resonances is. The more 4-Cyano-4'-pentylbiphenyl is interacting with the silicon microsphere, the lower the mode spacing of the resonances is. The silicon microspheres wetted with nematic liquid crystal can be used for optically addressed liquid-crystal-on-silicon displays, light valve applications, or reconfigurable optical networks.
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    Far-infrared elastic scattering proposal for the Avogadro Project's silicon spheres
    (Elsevier, 2018) Department of Physics; N/A; N/A; N/A; N/A; N/A; N/A; Serpengüzel, Ali; Humayun, Muhammad Hamza; Khan, Imran; Azeem, Farhan; Chaudhry, Muhammad Rehan; Gökay, Ulaş Sabahattin; Murib, Mohammed Sharif; Faculty Member; Researcher; Master Student; Researcher; Researcher; PhD Student; Researcher; Department of Physics; College of Sciences; College of Sciences; Graduate School of Sciences and Engineering; College of Sciences; College of Sciences; Graduate School of Sciences and Engineering; College of Sciences; 27855; N/A; N/A; N/A; N/A; N/A; N/A
    Avogadro constant determines the number of particles in one mole of a substance, thus relating the molar mass of the substance to the mass of this substance. Avogadro constant is related to Systeme Internationale base units by defining the very concept of chemical quantity. Revisions of the base units created a need to redefine the Avogadro constant, where a collaborative work called the Avogadro Project is established to employ optical interferometry to measure the diameter of high quality 100 mm silicon spheres. We propose far-infrared spectroscopy for determining the Avogadro constant by using elastic scattering from the 100 mm Avogadro Project silicon spheres. Similar spectroscopic methods are already in use in the near-infrared, relating whispering gallery modes of the 1 mm silicon spheres to the diameter of the spheres. We present numerical simulations in the far-infrared and the near-infrared, as well as spatially scaled down elastic scattering measurements in the near-infrared. These numerical and experimental results show that, the diameter measurements of 100 mm single crystal silicon spheres with elastic scattering in the far-infrared can be considered as an alternative to optical interferometry.
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    Optical modulation with a ruby microsphere in liquid crystal
    (Ieee, 2009) Beccherelli, Romeo; Department of Physics; N/A; N/A; Serpengüzel, Ali; Murib, Mohammed Sharif; Yılmaz, Hasan; Faculty Member; PhD Student; Master Student; Department of Physics; College of Sciences; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; 27855; N/A; 337846
    Optical spectra of a hybrid device consisting of a ruby microsphere and nematic liquid crystal are calculated at different voltages applied to the liquid crystal. A wavelength shift of 0.11 nm is observed for resonances with mode spacing of 1.6 nm.
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    Whispering-gallery modes observed in elastic scattering from submerged high-refractive-index silica microspheres
    (Society of Photo-optical Instrumentation Engineers (SPIE), 2017) Tamer, M. S.; Gurlu, O.; Department of Physics; Yılmaz, Hasan; Yılmaz, Huzeyfe; Murib, Mohammed Sharif; Serpengüzel, Ali; Master Student; Master Student; Faculty Member; Department of Physics; College of Sciences; N/A; N/A; N/A; 27855
    The effect of the discrete values of the refractive index of the surrounding medium on the spectral behavior of the whispering-gallery modes (WGMs) in the elastic scattering spectra of high-refractive-index silica microspheres submerged in fluids, such as air, water, and glycerol, is studied. The elastic scattering spectral measurements, as well as the spectral autocorrelation analysis of these elastic scattering spectra show that the spectral-mode spacing, the spectral-mode density, and the spectral-mode definition of the WGMs decrease as the refractive index of the surrounding fluid increases. We believe that this work opens up the way for optofluidic applications of high-refractive-index silica microsphere-based guided wave optics.