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Conference on Physics and Simulation of Optoelectronic Devices XI

作者： Akbari, M Schünemann, K Burkhard, H Univ Tehran Tehran 14174 Iran

A rigorous and numerically efficient method for 2D and 3D analysis of general periodic structures is described and applied to a number of passive and active optical devices.

ISBN: (纸本)0819447862

A rigorous and numerically efficient method for 2D and 3D analysis of general periodic structures is described and applied to a number of passive and active optical devices.

关键词： Waveguides Wave propagation 3D modeling Dielectrics Reflection Magnetism Active optics finite-difference time-domain method Radio propagation Visualization

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Four-channel strip power dividers 4

Four-channel strip power dividers

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4th International Conference on Antenna Theory and Techniques

作者： Martynyuk, SE Stepanenko, PJ Tereshchenko, VM Natl Tech Univ Ukraine Kiev Polytech Inst Dept Theoret Backgrounds Radio Engn Kiev Ukraine

ISBN: (纸本)0780378814

The finite-difference time-domain method has been applied successfully for electrodynamic analysis of the four-channel strip power divider taking into account finite losses in dielectric substrate and the presence of metal box. A test sample of the power divider was designed and manufactured. Results of its theoretical and experimental investigations are in good agreement.

关键词： multichannel power divider a strip line finite-difference time-domain method

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Simulation of nonlinear optical waveguide structure by using FDTD technique

Simulation of nonlinear optical waveguide structure by using...

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19th Congress of the International-Commission-for-Optics

作者： Shabat, MM Barakat, NM Al-azab, S Jäger, D Islamic Univ Gaza Dept Phys Gaza Israel

ISBN: (纸本)0819445967

The finite difference-time domain Technique is at present the most widely used tool employed in the study of light propagation in various photonic waveguide structure [1-4]. The present paper proposes a new approach of FDTD technique to simulate the wave equation in a four optical waveguiding rectangular structure. We derive the stability condition to achieve the stability in nonlinear media region, we also check that the wave equation used is consistence and convergent with the approximate finite difference equation. Our method is tested against some previous problems and we found a high degree of accuracy, moreover it is easy for programming. Numerical results are illustrated for a rectangular waveguide with four layers, where one of these layers is a nonlinear medium.

关键词： finite-difference time-domain method Waveguides Erbium Optical simulations Light wave propagation Nonlinear optics Computer programming Geometrical optics Mathematics Radio propagation

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FDTD method based electromagnetic solver for printed-circuit analysis 4

FDTD method based electromagnetic solver for printed-circuit...

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4th International Conference on Antenna Theory and Techniques

作者： Gnilenko, AB Paliy, OV Dniepropetrovsk Natl Univ Dept Radio Phys Dnepropetrovsk Ukraine

ISBN: (纸本)0780378814

An electromagnetic, solver for printed-circuit analysis is presented. The. electromagnetic simulator is based on finite-difference time-domain method with first-order Mur's absorbing boundary conditions.. The solver environment comprises a layout graphic editor for circuit topology preparation and a data postprocessor for calculation result presentation. The solver has been applied. to the analysis of printed-curcuit components such as printed antenna, microstrip discontinuities, etc.

关键词： finite-difference time-domain method Maxwell's equations absorbing boundary conditions microstrip discontinuity printed antenna

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Rigorous simulation of lithographic exposure of photoresist over a nonplanar wafer

Rigorous simulation of lithographic exposure of photoresist ...

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19th Congress of the International-Commission-for-Optics

作者： Erdmann, A Kalus, C Fraunhofer Inst Integrated Circuits Device Technol Div IIS B D-91058 Erlangen Germany

ISBN: (纸本)0819445967

Lithographic exposures belong to the most critical process steps in the manufacturing of microelectronic circuits. Almost all exposures are performed over nonplanar wafers. The backscattering of light from topographic features on these wafers is of increasing concern for the accuracy and stability of lithographic processes. We combine standard imaging theory and finite-difference time-domain (FDTD) algorithms to simulate several typical geometries. Consequences with respect to typical lithographic process parameters are discussed.

关键词： Lithography Semiconducting wafers Photoresist materials Photomasks Diffraction finite-difference time-domain method Computer simulations Microelectronics Silicon Light wave propagation

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Dynamical model of two-dimensional self-induced-transparency-solitons and pattern formation in nonlinear optical waveguides and semiconductor microcavities

Dynamical model of two-dimensional self-induced-transparency...

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Conference on Physics and Simulation of Optoelectronic Devices XI

作者： Slavcheva, GM Arnold, JM Ziolkowski, RW Univ Glasgow Dept Elect & Elect Engn Glasgow G12 8QQ Lanark Scotland

ISBN: (纸本)0819447862

We propose a novel multidimensional dynamical model for description of the coherent interactions of ultrashort high-intensity optical pulses with the resonant nonlinearities in planar optical waveguides and semiconductor microresonators. The model is based on the self-consistent solution of the full-wave vectorial Maxwell's equations coupled via polarization source terms to the evolution equations of a discrete multilevel quantum system. The latter are derived employing a group-theoretical approach exploiting symmetric properties of the system Hamiltonian. In particular, the resonant nonlinearity is modelled by a degenerate three-level system of saturable absorbers in order to account for the two-dimensional medium polarization. The resulting Maxwell-pseudospin equations are solved in the time domain using the finite-difference time-domain (FDTD) method. The model is applied for studying conditions of onset of self-induced transparency (SIT) lossless regime of propagation. Numerical evidence of multidimensional solitons localized both in space and in time is given for the planar optical waveguides. Pattern formation and cavity SIT-soliton formation are demonstrated for the special case of a passive semiconductor microcavity filled with saturable absorbers.

关键词： self-induced transparency ultrashort optical pulses Maxwell-Bloch system multidimensional solitons light bullets resonant nonlinearities semiconductor microcavities spatiotemporal dynamics finite-difference time-domain method

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All-optical switching using optical bistability in non-linear photonic crystals

All-optical switching using optical bistability in non-linea...

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Conference on Photonic Crystal Materials and Devices

作者： Soljacic, M Ibanescu, M Luo, CY Johnson, SG Fan, SH Fink, Y Joannopoulos, JD MIT Dept Phys Cambridge MA 02139 USA

We demonstrate optical bistability in a class of non-linear photonic crystal devices, through the use of detailed numerical experiments, and analytical theory. Our devices are shorter than the wavelength of light in l... 详细信息

ISBN: (纸本)0819448001

关键词： Bistability Nonlinear optics Photonic crystals Optical fibers Waveguides Modulation Cladding finite-difference time-domain method Optical spheres

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Extension of R-FDTD algorithm for solving Maxwell equations in homogeneous isotropic lossy media 3

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3rd Asia-Pacific Conference on Environmental Electromagnetics

作者： Yu, TB Zhou, BH Chen, B Nanjing Engn Inst EMP Lab Nanjing 210007 Peoples R China

ISBN: (纸本)7563508023

An attractive advance in the use of the finite-difference time-domain (FDTD) method has been the introduction of the reduced FDTD (R-FDTD) algorithm, which can reduce computer memory requirement in the storage of the fields by up to 33%. The initial implementation is limited for solving Maxwell equations in isotropic lossless media. This paper introduces an extension of R-FDTD algorithm. The proposed extension uses FDTD formula of Maxwell curl equations to eliminate one component each of E and H. This enables us have a memory-efficient formulation for solving Maxwell equations in homogeneous isotropic lossy media.

关键词： Maxwell equations finite difference time-domain analysis absorbing media R-FDTD algorithm homogeneous isotropic lossy media finite-difference time-domain method reduced FDTD E component H component computer memory requirement Maxwell curl equations

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Bistability in a non linear grating: a FD-TD approach

Bistability in a non linear grating: a FD-TD approach

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19th Congress of the International-Commission-for-Optics

作者： Saccomandi, L Fogli, F Bassi, P Bellanca, G Trillo, S Univ Bologna Dipartimento Elettron Informat & Sistemist DEIS I-40136 Bologna Italy

ISBN: (纸本)0819445967

The transmission properties of a one-dimensional grating with a Keff non linearity, at operating frequencies close to the upper edge of the stop-band, have been investigated using the finite difference time domain (FD-TD) technique. Results show that the structure exhibits a bistable behavior: transitions from strong reflection to nonlinearity-induced transparency and viceversa are found, leading to high-intensity field. localization within the grating. In the limit of shallow gratings, FD-TD results are in good agreement with those based on coupled-mode theory (CMT).

关键词： Bistability Transmittance finite-difference time-domain method Transparency Fiber Bragg gratings Kerr effect Nonlinear optics Optical components Physics Transient nonlinear optics

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A framework for macromodeling and mixed-mode simulation of circuits/interconnects and electromagnetic radiations

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IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 2003年第2期E86A卷 252-261页

作者： Watanabe, T Asai, H Univ Shizuoka Sch Adm & Informat Shizuoka 4228526 Japan Shizuoka Univ Fac Engn Dept Syst Engn Hamamatsu Shizuoka 4328651 Japan

This paper presents a framework for modeling and mixed-mode simulation of circuits/ interconnects and electro-magnetic (EM-) radiations. The proposed framework investigates the signal integrity in VLSI chips, packages and wiring boards at the GHz-band level, and verifies the electromagnetic interference (EMI) and the electromagnetic compatibility (EMC) of high-speed systems. In our framework, the frequency characteristics of interconnects and EM-radiations are extracted by the full-wave FDTD simulation. The macromodels of interconnects are synthesized as SPICE subcircuits, and the impulse responses of EM-radiations are stored in the database. Once the macromodels are synthesized, the circuit simulation with the consideration of EM-effects can be performed by using SPICE. The EM-field distributions can be also easily calculated by taking convolutions of pre-simulated EM impulse responses and the SPICE results.

关键词： analog circuit simulation SPICE macromodel electromagnetic radiations finite-difference time-domain method

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