Now showing items 1-20 of 12888

    • Reflectivity control via second-order interaction process in one-dimensional photonic band-gap structures 

      Centini, M.; Sibilia, C.; D’Aguanno, G.; Bertolotti, M.; Scalora, M.; Bloemer, M. J.; Bowden, C. M. (Elsevier, 2000-10-06)
      We exploit the nonlinear reflectivity of a pulse at the fundamental frequency induced by a second harmonic signal in one-dimensional photonic band gap structures for applications to fast control of light-by-light and all ...
    • Radiation pressure of light pulses and conservation of linear momentum in dispersive media 

      Scalora, Michael; D’Aguanno, Giuseppe; Mattiucci, Nadia; Bloemer, Mark J.; Centini, Marco; Sibilia, Concita; Haus, Joseph W. (American Physical Society (APS), 2006-05-16)
      We derive an expression for the Minkowski momentum under conditions of dispersive susceptibility and permeability, and compare it to the Abraham momentum in order to test the principle of conservation of linear momentum ...
    • Quasinormal-mode description of waves in one-dimensional photonic crystals 

      Settimi, A.; Severini, S.; Mattiucci, N.; Sibilia, C.; Centini, M.; D’Aguanno, G.; Bertolotti, M.; Scalora, M.; Bloemer, M.; Bowden, C. M. (American Physical Society (APS), 2003-08-29)
      Quasinormal-mode treatment is extended to the description of scalar field behavior in one-dimensional photonic crystals. A one-dimensional photonic crystal is a particular configuration of an open cavity, where discontinuities ...
    • Quenched optical transmission in ultrathin subwavelength plasmonic gratings 

      D’Aguanno, G.; Mattiucci, N.; Alù, A.; Bloemer, M. J. (American Physical Society (APS), 2011-01-27)
      We discuss the optical properties of one-dimensional ultrathin subwavelength, metallic gratings under transverse magnetic excitation, with particular attention to the phenomenon of quenched transmission, recently highlighted ...
    • Phase-matched second harmonic generation at the Dirac point of a 2-D photonic crystal. 

      Mattiucci, Nadia; Bloemer, Mark J.; D’Aguanno, Giuseppe
      We study second harmonic generation in a 2-D photonic crystal with the pump field tuned at the Dirac point of the structure. The simultaneous generation of both forward and backward phase-matched second harmonic is achieved ...
    • Toxic Work Environments In The Arts: When To Walk Away And When To Stay 

      Lyles, Kristina (2020-05-28)
      This paper examines the characteristics of toxic work environments in the nonprofit arts sector to inform art administrators when they should leave their toxic organization or stay and work for change. Characteristics that ...
    • Pulse propagation, dispersion, and energy in magnetic materials 

      Scalora, Michael; D’Aguanno, Giuseppe; Mattiucci, Nadia; Akozbek, Neset; Bloemer, Mark J.; Centini, Marco; Sibilia, Concita; Bertolotti, Mario (American Physical Society (APS), 2005-12-05)
      We discuss pulse propagation effects in generic, electrically and magnetically dispersive media that may display large material discontinuities, such as a surface boundary. Using the known basic constitutive relations ...
    • Plasmonic nanoparticles and metasurfaces to realize Fano spectra at ultraviolet wavelengths 

      Argyropoulos, Christos; Monticone, Francesco; D’Aguanno, Giuseppe; Alù, Andrea (AIP publishing, 2013-10-01)
      We discuss the possibility to realize sharp Fano scattering signatures in the ultraviolet (UV) range, based on dipolar scattering of nanoparticles. At these frequencies, material losses usually do not allow sharp resonant ...
    • Plasmonic Brewster Angle: Broadband Extraordinary Transmission through Optical Gratings 

      Alù, Andrea; D’Aguanno, Giuseppe; Mattiucci, Nadia; Bloemer, Mark J. (American Physical Society (APS), 2011-03-23)
      Extraordinary optical transmission through metallic gratings is a well established effect based on the collective resonance of corrugated screens. Being based on plasmonic resonances, its bandwidth is inherently narrow, ...
    • Photonic band edge effects in finite structures and applications to χ⁽²⁾ interactions 

      D’Aguanno, G.; Centini, M.; Scalora, M.; Sibilia, C.; Dumeige, Y.; Vidakovic, P.; Levenson, J. A.; Bloemer, M. J.; Bowden, C. M.; Haus, J.W.; Bertolotti, M. (American Physical Society (APS), 2001-06-25)
      Using the concept of an effective medium, we derive coupled mode equations for nonlinear quadratic interactions in photonic band gap structures of finite length. The resulting equations reveal the essential roles played ...
    • Optomechanical frequency combs 

      Miri, Mohammad-Ali; D’Aguanno, Giuseppe; Alù, Andrea (IOP, 2018-04-12)
      We study the formation of frequency combs in a single-mode optomechanical cavity. The comb is composed of equidistant spectral lines centered at the pump laser frequency and located at different harmonics of the mechanical ...
    • Optical vortices during a superresolution process in a metamaterial 

      D’Aguanno, G.; Mattiucci, N.; Bloemer, M.; Desyatnikov, A. (American Physical Society (APS), 2008-04-17)
      We show that a superresolution process with 100% visibility is characterized by the formation of a point of phase singularity in free space outside a metamaterial in the form of a saddle with topological charge equal to ...
    • Nonlinear pulse propagation in one-dimensional metal-dielectric multilayer stacks: Ultrawide bandwidth optical limiting 

      Scalora, Michael; Mattiucci, Nadia; D’Aguanno, Giuseppe; Larciprete, MariaCristina; Bloemer, Mark J. (American Physical Society (APS), 2006-01-12)
      We numerically study the nonlinear optical properties of metal-dielectric photonic band gap structures in the pulsed regime. We exploit the high χ⁽³⁾ of copper metal to induce nonlinear effects such as broadband optical ...
    • Negative refraction of ultra-short electromagnetic pulses 

      Scalora, M; D’Aguanno, G.; Mattiucci, N.; Bloemer, M. J.; Haus, J.W.; Zheltikov, A. M. (Springer Nature, 2005-07-15)
      We study pulse propagation across a boundary that separates an ordinary medium from a medium with simultaneously negative dielectric permittivity and magnetic permeability. Solving Maxwell’s equations with two spatial ...
    • Negative refraction and sub-wavelength focusing in the visible range using transparent metallo-dielectric stacks 

      Scalora, Michael; D’Aguanno, Giuseppe; Mattiucci, Nadia; Bloemer, Mark J.; Ceglia, Domenico de; Centini, Marco; Mandatori, Antonio; Sibilia, Concita; Akozbek, Neset; Cappeddu, Mirko G.; Fowler, Mark; Haus, Joseph W.
      We numerically demonstrate negative refraction of the Poynting vector and sub-wavelength focusing in the visible part of the spectrum using a transparent multilayer, metallo-dielectric photonic band gap structure. Our ...
    • Mode-matched Fano resonances for all-optical switching applications 

      Mattiucci, Nadia; D’Aguanno, Giuseppe; Bloemer, Mark J. (Elsevier, 2011-12-13)
      We introduce the concept of mode-matched Fano resonances in one-dimensional, subwavelength, diffraction gratings. These resonances are characterized by an extremely high quality (Q)-factor and lend themselves well for ...
    • Matching and funneling light at the plasmonic Brewster angle 

      Argyropoulos, Christos; D’Aguanno, Giuseppe; Mattiucci, Nadia; Akozbek, Neset; Bloemer, Mark J.; Alù, Andrea (American Physical Society (APS), 2012-01-31)
      The ultrabroadband impedance matching of metallic gratings at the plasmonic Brewster angle [A. Alù et al., Phys. Rev. Lett. 106, 123902 (2011)] is analyzed here in several realistic scenarios and configurations, and in the ...
    • Manipulating the extraordinary acoustic transmission through metamaterial-based acoustic band gap structures 

      Aközbek, N.; Mattiucci, N.; Bloemer, M. J.; Sanghadasa, M.; D'Aguanno, G. (AIP publishing, 2014-04-23)
      We report theoretical predictions and experimental results on the formation of pass bands and stop bands of extraordinary acoustic transmission in multilayer structures based on alternating layers of acoustic metamaterial ...
    • Large enhancement of interface second-harmonic generation near the zero- ¯ n gap of a negative-index Bragg grating 

      D’Aguanno, Giuseppe; Mattiucci, Nadia; Bloemer, Mark J.; Scalora, Michael (American Physical Society (APS), 2006-03-06)
      We predict a large enhancement of interface second-harmonic generation near the zero- ¯n gap of a Bragg grating made of alternating layers of negative- and positive-index materials. Field localization and coherent ...
    • Long range plasmon assisted all-optical switching at telecommunication wavelengths 

      Mattiucci, Nadia; D’Aguanno, Giuseppe; Bloemer, Mark J.
      We exploit the properties of ultranarrow, Fano-like resonances generated by the coupling of long range surface plasmons with ultrathin (∼10 nm), metallic, subwavelength gratings embedded in a nonlinear, cubic material to ...