Now showing items 1-20 of 25

    • Bioinspired micrograting arrays mimicking the reverse color diffraction elements evolved by the butterfly Pierella luna 

      England, Grant Tyler; Kolle, Mathias; Kim, Philseok; Khan, Mughees; Munoz, Philip Alejandro; Mazur, Eric; Aizenberg, Joanna (Proceedings of the National Academy of Sciences, 2014)
      Recently, diffraction elements that reverse the color sequence normally observed in planar diffraction gratings have been found in the wing scales of the butterfly Pierella luna. Here, we describe the creation of an ...
    • Can Mixed-Metal Surfaces Provide an Additional Enhancement to SERS? 

      Olivares-Amaya, Roberto; Rappoport, Dmitrij; Munoz, Philip Alejandro; Peng, Paul; Mazur, Eric; Aspuru-Guzik, Alan (American Chemical Society, 2012)
      We explore the chemical contribution to surface-enhanced Raman scattering (SERS) in mixed-metal substrates, both experimentally and by computer simulation. These substrates are composed of a chemically active, transition-metal ...
    • Comparison of Structure and Properties of Femtosecond and Nanosecond Laser-Structured Silicon 

      Crouch, C. H.; Carey, J. E.; Warrender, J. M.; Aziz, Michael J.; Mazur, Eric; Genin, F. Y. (American Institute of Physics, 2004)
      We compare the optical properties, chemical composition, and crystallinity of silicon microstructures formed in the presence of SF6 by femtosecond laser irradiation and by nanosecond laser irradiation. In spite of very ...
    • Efficient photon triplet generation in integrated nanophotonic waveguides 

      Moebius, Michael Gerhard; Herrera, Felipe; Griesse-Nascimento, Sarah Emily; Reshef, Orad; Evans, Christopher H.; Guerreschi, Gian Giacomo; Aspuru-Guzik, Alan; Mazur, Eric (The Optical Society, 2016)
      Generation of entangled photons in nonlinear media constitutes a basic building block of modern photonic quantum technology. Current optical materials are severely limited in their ability to produce three or more entangled ...
    • Fabrication techniques for femtosecond laser textured and hyperdoped silicon 

      Franta, Benjamin Andrew (2016-05-18)
      This thesis presents a range of advances in the fabrication of femtosecond laser textured and hyperdoped silicon, a material platform with potential applications in photovoltaics, photodetectors, light-emitting diodes, ...
    • Femtosecond Laser Ablation Reveals Antagonistic Sensory and Neuroendocrine Signaling that Underlie C. elegans Behavior and Development 

      Chung, Samuel H.; Schmalz, Anja; Ruiz, Roanna C.H.; Gabel, Christopher V.; Mazur, Eric (2015)
      SUMMARY The specific roles of neuronal subcellular components in behavior and development remain largely unknown, even though advances in molecular biology and conventional whole-cell laser ablation have greatly accelerated ...
    • Femtosecond laser direct writing of 3D metallic structures and 2D graphite 

      Kang, Seungyeon (2014-06-06)
      This thesis explores a novel methodology to fabricate three dimensional (3D) metal-dielectric structures, and two dimensional (2D) graphite layers for emerging metamaterials and graphene applications. The investigations ...
    • Femtosecond Laser Processing of Wide Bandgap Semiconductors and Their Applications 

      Phillips, Katherine Collett Furr (2014-11-19)
      This thesis explores the production, characterization, and water oxidation efficiency of wide bandgap semiconductors made through femtosecond-laser irradiation of various materials. Our investigation focuses on three ...
    • Femtosecond-laser hyperdoping and texturing of silicon for photovoltaic applications 

      Lin, Yu-Ting (2014-06-06)
      This dissertation explores strategies for improving photolvoltaic efficiency and reducing cost using femtosecond-laser processing methods including surface texturing and hyperdoping. Our investigations focus on two aspects: ...
    • Insulator-to-Metal Transition in Sulfur-Doped Silicon 

      Winkler, Mark T.; Recht, Daniel; Sher, Meng-Ju; Said, Aurore J.; Mazur, Eric; Aziz, Michael J. (American Physical Society, 2011)
      We observe an insulator-to-metal transition in crystalline silicon doped with sulfur to nonequilibrium concentrations using ion implantation followed by pulsed-laser melting and rapid resolidification. This insulator-to-metal ...
    • Integrated Metamaterials and Nanophotonics in CMOS-Compatible Materials 

      Reshef, Orad (2016-09-13)
      This thesis explores scalable nanophotonic devices in integrated, CMOS-compatible platforms. Our investigation focuses on two main projects: studying the material properties of integrated titanium dioxide (TiO2), and ...
    • Integrated Zero-Index Metamaterials 

      Camayd-Muñoz, Philip (2016-09-13)
      Nanotechnology has enabled the development of nanostructured composite materials (metamaterials) with exotic optical properties not found in nature. In the most extreme case, we can create materials that support light waves ...
    • Intermediate Band Properties of Femtosecond-Laser Hyperdoped Silicon 

      Sher, Meng-Ju (2013-09-23)
      This thesis explores using femtosecond-laser pulses to hyperdope silicon with chalcogen dopants at concentrations above the maximum equilibrium solubility. Hyperdoped silicon is promising for improving efficiencies of solar ...
    • Interpreting Assessments of Student Learning in the Introductory Physics Classroom and Laboratory 

      Dowd, Jason (2012-07-23)
      Assessment is the primary means of feedback between students and instructors. However, to effectively use assessment, the ability to interpret collected information is essential. We present insights into three unique, ...
    • Nonlinear optics in titanium dioxide: from bulk to integrated optical devices 

      Evans, Christopher Courtney (2013-10-18)
      In this thesis, we explore titanium dioxide (TiO2) for ultrafast, on-chip nonlinear optics by studying it in bulk, thin films, and in integrated nonlinear optical devices. TiO2's large nonlinear index of refraction (30 ...
    • Nucleation and Transport Organize Microtubules in Metaphase Spindles 

      Brugués, Jan; Nuzzo, Valeria; Mazur, Eric; Needleman, Daniel Joseph (Elsevier BV, 2012)
      Spindles are arrays of microtubules that segregate chromosomes during cell division. It has been difficult to validate models of spindle assembly due to a lack of information on the organization of microtubules in these ...
    • On-chip zero-index metamaterials 

      Li, Yang; Kita, Shota; Munoz, Philip Alejandro; Reshef, Orad; Vulis, Daryl Inna; Yin, Mei; Loncar, Marko; Mazur, Eric (Nature Publishing Group, 2015)
      Metamaterials with a refractive index of zero exhibit physical properties such as infinite phase velocity and wavelength. However, there is no way to implement these materials on a photonic chip, restricting the investigation ...
    • Response switching and self-efficacy in Peer Instruction classrooms 

      Miller, Kelly Anne; Schell, Julie; Ho, Andrew Dean; Lukoff, Brian; Mazur, Eric (American Physical Society (APS), 2015)
      Peer Instruction, a well-known student-centered teaching method, engages students during class through structured, frequent questioning and is often facilitated by classroom response systems. The central feature of any ...
    • Role of Pre-Course Student Characteristics on Student Learning in Interactive Teaching Environments 

      Miller, Kelly Anne (2014-11-24)
      The goal of this dissertation is to broaden our understanding of interactive teaching strategies, in the context of the introductory physics classroom at the undergraduate level. The dissertation is divided into four main ...
    • The Role of the AFD Neuron in C. elegans Thermotaxis Analyzed Using Femtosecond Laser Ablation 

      Chung, Samuel Hue-Kay; Samuel, Aravinthan DT; Clark, Damon A; Gabel, Christopher Vaughn; Mazur, Eric (BioMed Central, 2006)
      Background: Caenorhabditis elegans actively crawls down thermal gradients until it reaches the temperature of its prior cultivation, exhibiting what is called cryophilic movement. Implicit in the worm's performance of ...