Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Suresh Pereira"'
Publikováno v:
Photonics and Nanostructures - Fundamentals and Applications. 4:75-88
We present detailed analytical and numerical studies of nonlinear wave interaction processes in one-dimensional (1D) photonic band gap (PBG) materials with a Kerr nonlinearity. We demonstrate that some of these processes provide efficient mechanisms
Publikováno v:
Photonics and Nanostructures - Fundamentals and Applications. 2:181-190
We show numerically that a Kerr nonlinear system composed of two channel waveguides coupled periodically by circular microresonators can be used as an all optical diode. The diode has low intensity requirements ( ∼ 50 MW/cm 2 ) and compact dimensio
Publikováno v:
Europhysics Letters (EPL). 68:205-211
The nonresonant interaction of nonlinear waves in one-dimensional photonic band gap materials is investigated analytically and numerically. We derive highly accurate analytical formulae that determine the phase shift experienced by nonlinear waves du
Autor:
Georg von Freymann, M. Deubel, Suresh Pereira, Kurt Busch, Costas M. Soukoulis, Martin Wegener
Publikováno v:
Nature Materials. 3:444-447
The past decade has witnessed intensive research efforts related to the design and fabrication of photonic crystals. These periodically structured dielectric materials can represent the optical analogue of semiconductor crystals, and provide a novel
Publikováno v:
Optics Communications. 213:163-171
We show that the optical response of two channel waveguides coupled by a microresonator is well described by a Lorentzian model. Using this model we derive a set of coupled differential equations that describe Kerr nonlinear optical pulse propagation
Publikováno v:
Optics Communications. 170:35-40
We consider a Mach–Zehnder interferometer with a nonlinear Bragg grating in one arm, and numerically simulate the time dependent behaviour of the all-optical switch. Compared with the same device without a grating the switching threshold is reduced
Autor:
U. Gösele, Martin Wegener, Antonio García-Martín, D. C. Meisel, Jörg Schilling, W. Koch, G. von Freymann, Suresh Pereira, Kurt Busch, Ralf B. Wehrspohn, Marcus Diem
Publikováno v:
Applied Physics Letters. 83:614-616
We show that the envelope of the diffraction efficiency of a two-dimensional photonic crystal can exhibit spectral regions of very small diffraction efficiency (
Autor:
Sophie LaRochelle, Suresh Pereira
Publikováno v:
Optics express. 13(6)
We analyze, theoretically, a Fabry-Perot interferometer constructed from superimposed, chirped fiber Bragg gratings. Interference effects between the superimposed gratings play a large role in determining the exact positions of the FP resonances. We
Autor:
Suresh Pereira, John E. Sipe
Publikováno v:
Optics express. 3(11)
We present two sets of equations to describe nonlinear pulse propagation in a birefringent fiber Bragg grating. The first set uses a coupled-mode formalism to describe light in or near the photonic band gap of the grating. The second set is a pair of
Publikováno v:
Optics letters. 27(7)
We show that, when two channel waveguides are coupled by a sequence of periodically spaced microresonators, the group-velocity dispersion is low in the vicinity of the gap associated with the resonant frequency of the resonators. This low dispersion