2,001 research outputs found
Michael Rodriguez interviews author Tom Springer
No full textAuthor Tom Springer is interviewed about his writing career and his newest book "Looking for hickories". Springer talks about his career following after earning an Environmental Journalism degree from Michigan State University. He calls his genre "creative non-fiction" and explains how he weaves his memories into his books about life in rural and wild Michigan. Part of the Michigan State University Libraries' Michigan Writers Series. Springer is interviewed by Librarian Michael Rodriguez
On a Steklov Spectrum in Electromagnetics
Get PDFAfter presenting various concepts and results concerning the classical Steklov eigenproblem, we focus on analogous problems for time-harmonic Maxwell's equations in a cavity. In this direction, we discuss recent rigorous results concerning natural Steklov boundary value problems for the curlcurl operator. Moreover, we explicitly compute eigenvalues and eigenfunctions in the unit ball of the three-dimensional Euclidean space by using classical vector spherical harmonics
Special section guest editorial: Nanostructured thin films V: Fundamentals and applications
Get PDFMacKay, Tom G., Jen, Yijun, Martín-Palma, Raúl José, "Special section guest editorial: Nanostructured thin films V: Fundamentals and applications" Journal of Nanophotonics, Elsevier B.V, 7, 73501, (2013). Copyright 2014 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibite
Left/right asymmetry in Dyakonov-Tamm-wave propagation guided by a topological insulator and a structurally chiral material
Get PDFThe propagation of Dyakonov–Tamm waves guided by the planar interface of an isotropic topological insulator and a structurally chiral material, both assumed to be nonmagnetic, was investigated by numerically solving the associated canonical boundary-value problem. The topologically insulating surface states of the topological insulator were quantitated via a surface admittance gTI, which significantly affects the phase speeds and the spatial profiles of the Dyakonov–Tamm waves. Most significantly, it is possible that a Dyakonov–Tamm wave propagates co-parallel to a vector u in the interface plane, but no Dyakonov–Tamm wave propagates anti-parallel to u. The left/right asymmetry, which vanishes for gTI = 0, is highly attractive for one-way on-chip optical communication
Uniaxial dielectric media with hyperbolic dispersion relations
Get PDFPlanewave propagation with hyperbolic/hyperboliclike characteristics in uniaxial dielectric media is investigated. The phase velocity is positive with respect to the time-averaged Poynting vector for both evanescent and nonevanescent propagation in nondissipative media, A conceptualization of a uniaxial medium, which exhibits hyperboliclike planewave characteristics as a homogenized composite medium, is presented. © 2005 Wiley Periodicals, Inc.Fil: Mackay, Tom G.. University of Edinburgh; Reino UnidoFil: Lakhtakia, Akhlesh. Pennsylvania State University; Estados UnidosFil: Depine, Ricardo Angel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentin
Author Tom Springer reads from his book at the Michigan Writers Series
No full textAuthor Tom Springer credits his mother for developing his passion for reading and explains how he came to writing, calling himself "the least likely person to be standing up here". Springer, who works as chief editor and program manager for the Kellogg Foundation in Battle Creek, Michigan, describes his journey from a below average, blue-collar kid in southwest Michigan to the writing profession. He reads from his collection "Looking for hickories: the forgotten wildness of the rural Midwest", named a 2009 Michigan Notable Book. Springer interjects his observations on life in Michigan and its cultural history, while reading. He concludes by answering questions. Introduced by MSU Librarian Michael Rodriguez. Part of the Michigan State University Libraries' Michigan Writers Series
Asymmetries in surface waves and reflection/transmission characteristics associated with topological insulators
No full textTransition from Dyakonov and Dyakonov-Tamm surface waves to surface-plasmon-polariton waves induced by temperature
No full textSignatures of thermal hysteresis in Tamm-wave propagation
Get PDFWe numerically solved the boundary-value problem for Tamm waves (which may also be classified as Uller–Zenneck waves here) guided by the planar interface of a homogeneous isotropic dissipative dielectric (HIDD) material and a periodically multilayered isotropic dielectric material. The HIDD material was chosen to be VO2, which, at optical wavelengths, has a temperature-dependent refractive index with a hysteresis feature, i.e., the temperature-dependence of its refractive index varies depending upon whether the temperature is increasing or decreasing. A numerical code was implemented to extract solutions of the dispersion equation at a fixed wavelength for both p- and s-polarization states over the temperature range [50,80]°C. A multitude of Tamm waves of both linear polarization states were found, demonstrating a clear demarcation of the heating and cooling phases in terms of wavenumbers and propagation distances. Thereby, the signatures of thermal hysteresis in Tamm-wave propagation were revealed
Temperature-mediated transition from Dyakonov–Tamm surface waves to surfaceplasmon-polariton waves
Get PDFThe effect of changing the temperature on the propagation of electromagnetic surface waves (ESWs), guided by the planar interface of a homogeneous isotropic temperature-sensitive material (namely, InSb) and a temperature-insensitive structurally chiral material (SCM) was numerically investigated in the terahertz frequency regime. As the temperature rises, InSb transforms from a dissipative dielectric material to a \blue{dissipative} plasmonic material. Correspondingly, the ESWs transmute from Dyakonov--Tamm surface waves into surface--plasmon--polariton waves. The effects of the temperature change are clearly observed in the phase speeds, propagation distances, angular existence domains, multiplicity, and spatial profiles of energy flow of the ESWs. Remarkably large propagation distances can be achieved; in such instances the energy of an ESW is confined almost entirely within the SCM. For certain propagation directions, simultaneous excitation of two ESWs with (i) the same phase speeds but different propagation distances or (ii) the same propagation distances but different phase speeds are also indicated by our results
- …
