Refractometry

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  Subject Areas on Research

  • A chiton uses aragonite lenses to form images. 
  • A fiber-based ratiometric optical cardiac mapping channel using a diffraction grating and split detector. 
  • A highly distributed Bragg stack with unique geometry provides effective camouflage for Loliginid squid eyes. 
  • A metamaterial absorber for the terahertz regime: design, fabrication and characterization. 
  • A versatile diffractive maskless lithography for single-shot and serial microfabrication. 
  • Analysis of slitless holographic spectrometers implemented by spherical beam volume holograms. 
  • Analysis of vaginal microbicide film hydration kinetics by quantitative imaging refractometry. 
  • Angle-dependent resonance of localized and propagating surface plasmons in microhole arrays for enhanced biosensing. 
  • Bragg grating-based fibre optic sensors in structural health monitoring. 
  • Broadband gradient index microwave quasi-optical elements based on non-resonant metamaterials. 
  • Classification of atherosclerotic rabbit aorta samples with an infrared attenuated total reflection catheter and multivariate data analysis. 
  • Coded aperture Raman spectroscopy for quantitative measurements of ethanol in a tissue phantom. 
  • Colloid osmotic pressure of steer alpha- and beta-crystallins: possible functional roles for lens crystallin distribution and structural diversity. 
  • Colloid osmotic pressure of steer crystallins: implications for the origin of the refractive index gradient and transparency of the lens. 
  • Common MFRP sequence variants are not associated with moderate to high hyperopia, isolated microphthalmia, and high myopia. 
  • Complex k band diagrams of 3D metamaterial/photonic crystals. 
  • Coupled fiber taper extraction of 1.53 microm photoluminescence from erbium doped silicon nitride photonic crystal cavities. 
  • Design and fabrication of a metamaterial gradient index diffraction grating at infrared wavelengths. 
  • Design of an acoustic metamaterial lens using genetic algorithms. 
  • Direct coupling of plasmonic and photonic nanowires for hybrid nanophotonic components and circuits. 
  • Dispersion multiplexing with broadband filtering for miniature spectrometers. 
  • Dispersion-based stimulated Raman scattering spectroscopy, holography, and optical coherence tomography. 
  • Evolution of graded refractive index in squid lenses. 
  • Experimental verification of T-matrix-based inverse light scattering analysis for assessing structure of spheroids as models of cell nuclei. 
  • Far-field analysis of axially symmetric three-dimensional directional cloaks. 
  • Flexible metamaterial absorbers for stealth applications at terahertz frequencies. 
  • Flow stabilization with active hydrodynamic cloaks. 
  • Force chains in a two-dimensional granular pure shear experiment. 
  • Fourier domain multispectral multiple scattering low coherence interferometry. 
  • Fourier-domain angle-resolved low coherence interferometry through an endoscopic fiber bundle for light-scattering spectroscopy. 
  • Group refractive index reconstruction with broadband interferometric confocal microscopy. 
  • High-fidelity, broadband stimulated-Brillouin-scattering-based slow light using fast noise modulation. 
  • Improved interferometric detection of scattered light with a 4f imaging system. 
  • In situ nuclear morphology measurements using light scattering as biomarkers of neoplastic change in animal models of carcinogenesis. 
  • Is the nuclear refractive index lower than cytoplasm? Validation of phase measurements and implications for light scattering technologies. 
  • Label-free biosensing by surface plasmon resonance of nanoparticles on glass: optimization of nanoparticle size. 
  • Label-free, high-throughput measurements of dynamic changes in cell nuclei using angle-resolved low coherence interferometry. 
  • Low power resonant optical excitation of an optomechanical cavity. 
  • Measuring tumor cycling hypoxia and angiogenesis using a side-firing fiber optic probe. 
  • Molecular imaging of epidermal growth factor receptor in live cells with refractive index sensitivity using dark-field microspectroscopy and immunotargeted nanoparticles. 
  • Monte Carlo-based inverse model for calculating tissue optical properties. Part I: Theory and validation on synthetic phantoms. 
  • Multiscale lens design. 
  • Narrow groove plasmonic nano-gratings for surface plasmon resonance sensing. 
  • Nearly transparent SBS slow light in an optical fiber. 
  • Nonlinear oscillator metamaterial model: numerical and experimental verification. 
  • Nonlinear phase dispersion spectroscopy. 
  • Nuclear morphology measurements with angle-resolved low coherence interferometry for application to cell biology and early cancer detection. 
  • On-chip waveguide isolator based on bismuth iron garnet operating via nonreciprocal single-mode cutoff. 
  • Optical-CT 3D Dosimetry Using Fresnel Lenses with Minimal Refractive-Index Matching Fluid. 
  • Performance comparison of aperture codes for multimodal, multiplex spectroscopy. 
  • Phase-cycling coherent anti-Stokes Raman scattering using shaped femtosecond laser pulses. 
  • Plasmonics enhancement of a luminescent or Raman-active layer in a multilayered metallic nanoshell. 
  • Projected index computed tomography. 
  • Rapid and inexpensive fabrication of terahertz electromagnetic bandgap structures. 
  • Response to Comment on "Is the nuclear refractive index lower than cytoplasm? Validation of phase measurements and implications for light scattering technologies": A Comment on "How a phase image of a cell with nucleus refractive index smaller than that of the cytoplasm should look like?", e201800033. 
  • Retinal blood flow measurement by circumpapillary Fourier domain Doppler optical coherence tomography. 
  • Role of immersion refractometry for investigating laser-induced effects in cells. 
  • Scaling method for fast Monte Carlo simulation of diffuse reflectance spectra from multilayered turbid media. 
  • Scanning fiber angle-resolved low coherence interferometry. 
  • Simplifying numerical ray tracing for characterization of optical systems. 
  • Simulation of complex plasmonic circuits including bends. 
  • Simultaneous two-wavelength transmission quantitative phase microscopy with a color camera. 
  • Slow light with a swept-frequency source. 
  • Snapshot molecular imaging using coded energy-sensitive detection. 
  • Spatial and spectral detection of protein monolayers with deterministic aperiodic arrays of metal nanoparticles. 
  • Spatial light interference tomography (SLIT). 
  • Spherical beam volume holograms for spectroscopic applications: modeling and implementation. 
  • Stand-up magnetic metamaterials at terahertz frequencies. 
  • Static two-dimensional aperture coding for multimodal, multiplex spectroscopy. 
  • Synthesis of oxidation-resistant cupronickel nanowires for transparent conducting nanowire networks. 
  • THz near-field Faraday imaging in hybrid metamaterials. 
  • Terahertz electromagnetic crystal waveguide fabricated by polymer jetting rapid prototyping. 
  • The effect of nanowire length and diameter on the properties of transparent, conducting nanowire films. 
  • The optics of vitreous surgery. 
  • Time-resolved imaging refractometry of microbicidal films using quantitative phase microscopy. 
  • Transformation-optical design of adaptive beam bends and beam expanders. 
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  Keywords of People

  • Jokerst, Nan Marie, J. A. Jones Distinguished Professor of Electrical and Computer Engineering, Duke University Energy Initiative
  • Palmer, Gregory M., Associate Professor of Radiation Oncology, Radiation Oncology
  • Wax, Adam P., Professor of Biomedical Engineering, Biomedical Engineering