FDTD simulation

Fig. 2.3 By regarding a basic microring resonator as an optical circuit composed of a directional coupler and a curved waveguide (the cross hatched section), the characteristics of the microring resonator can be analyzed using simpler BPM code and transfer matrices instead of computation intensive FDTD simulation. Reprinted from Ref. 15 with permission. 2008 Institute of Electrical and Electronics Engineers...

Fig. 16.3 Simulation of transmission spectrum for a four resonator array. FDTD simulation showing the steady state electric field distributions when the device is excited at the (a) resonant wavelength and (b) nonresonant wavelength. Note that the color levels in this image are scaled to the maximum field intensity in each image not to each other. The field levels in (b) are roughly of 20 times greater magnitude than those shown in (a), (c) Output spectrum for a device consisting of a waveguide with four evanescently coupled side cavities adjacent to it. Here each resonator consists of a cavity with four holes on either side. Reprinted from Ref. 37 with permission. 2008 Optical Society of America...

Fig. 16.5 Response to refractive index interrogation of a single NOSA waveguide, (a) Output spectrum for a NOSA where one of the five resonators is fluidically targeted, first with water and then with a CaCl2 solution. The resonance of the targeted resonator shifts toward the red end of the spectrum due to the higher refractive index of the CaCl2 solution, (b) Experimental data (with error bars indicating inter device variability) showing the redshifts for various refractive index solutions. The solid line is the theoretically predicted redshift from FDTD simulations. The experimental data is in excellent agreement with the theory. Reprinted from Ref. 37 with permission. 2008 Optical Society of America...

Fig. 16.6 Estimates of device performance in response to nucleic acid binding, (a) FDTD simulation showing the mass sensitivity of the device plotted as a function of the number of functionalized holes. The circles indicate the sensitivity values calculated from the simulations. The solid curve shows a least squares fit using an analytical model for the device sensitivity, which is described below, (b) Plot illustrating the dependence of the shift in resonant wavelength of a resonator on the number of functionalized holes. The blue circles indicate the data obtained from 3D FDTD simulations. The solid curve is a best fit curve of the form a( 1 eTbN) where a and b are arbitrary constants. The values of a and b used here are 6.159 nm and 0.4273, respectively. Reprinted from Ref. 37 with permission. 2008 Optical Society of America...

Figure 2. The FDTD simulation results for the electric field components Ex (a) and (c) and the Poynting vector component (h) and Sx (d). The waveguide is along z axis, the dashed lines contouring the non-etched 0.6 pm thick region of the core.

The FDTD simulations were performed by OptiFDTD software from Optiwave Systems, Ottawa, ON, Canada, www.optiwave.com... 

Fig. 13 shows an example where data for an irregular struetured multilayer thin-film-filter (TFF) are imported into a waveguide design. A FDTD-simulation earned out in order to check the influence of the internal resonator-like strueture of the TFF onto the waveguide deviee shows a signifieant transversal shift for oblique incidence. This hinders symmetrical multi-port designs, but may be used for specific WDM functionality. ... 

Finally, FDTD may be used to model the coupling of the focal field into the PhC-waveguide, potentially with the presence of an air or glue gap. Even such a simulation procedure with adapted numerical methods for each part of the propagation requires a considerable computation time. To speed up the simulation process for system optimisation remarkably, the FDTD-simulation can be replaced by a formula for the coupling efficiency to a conventional high-index or a PhC-waveguide, ... 

FDTD Simulation of Light Propagation in Nanotube Arrays... 

The validity of the FDTD simulations were established hy comparison of the calculated and experimentally measured transmittance of a Type-I film of different porosity, see Fig. 5.28. 

From preprint servers 319 Ward, D. W. Nelson, K. A. Finite Difference Time Domain (FDTD) Simulations of Electromagnetic Wave Propagation Using a Spreadsheet. 2004,arXiv physics/0402096.arXiv.org e-Print archive, http //arxiv.org/abs/physics/0402096 (accessed Oct 13,2004). 

Saj, W. (2005). FDTD simulations of 2D plasmon waveguide on silver nanorods in hexagonal lattice. Opt. Express, 13 4818-4827. 

It becomes apparent that such spatial operators take into account both the time-step size and the shape of the elementary cells, namely they depend on the anisotropic features of the FDTD simulation. Besides, as compared to the schemes of Section 2.5.4, they exhibit a more narrow-band performance. 

FIGURE 7.10 Reflection coefficient between ports 1 and 3 of the three-port Y-junction for various FDTD simulations... 

TABLE 7.3 Maximum Global Error and Computational Aspects of Different HO ADI-FDTD Simulations ... 

S. Wang and F. L. Teixeira, An equivalent electric field source for wideband FDTD simulations of waveguide discontinuities, IEEE Microw. Wireless Compon. Lett, vol. 13, no. 1, pp. 27-29, Jan. 2003.doi 10.1109/LMWC.2002.807714... 

J. B. Schneider, Plane waves in FDTD simulations and a nearly total-field/scattered-field boundary, IEEE Trans. Antennas Propag., vol. 52, no. 12, pp. 3280—3287, Dec. 2004. doi 10.1109/TAP.2004.836403... 

Figure 1. Current Nanoscale Optofluidic Sensor Arrays, (a) 3D rendering of the NOSA device, (b) 3D rendering after association of the corresponding antibody to the antigen immobilized resonator, (c) Experimental data illustrating the successful detection of 45 pg/ml of anti-streptavidin antibody. The blue trace shows the initial baseline spectrum corresponding to Fig. la where the first resonator is immobilized with streptavidin. The red trace shows the test spectra after the association of anti-streptavidin. (d) Finite difference time domain (FDTD) simulation of the steady state electric field distribution within the 1-D photonic crystal resonator at the resonant wavelength, (e) SEM image demonstrating the two-dimensional multiplexing capability of the NOSA architecture.

Figure 3. Increase in absolute sensitivity as a function of number of functionalized holes. FDTD simulation showing the mass sensitivity of the device plotted as a function of the number of functionalized holes. The blue circles indicate the sensitivity values calculated from the simulations.

An asymptotic analysis of radiation pattern of a classical dipole in a photonic crystal with an incomplete photonic bandgap is presented. Numerical examples and comparison with FDTD simulation are given for two-dimensional photonic crystals. 

Subirats M, Iskander MF, White MJ, Kiggans JO (1997) FDTD simulation of microwave sintering in large (500/4000 liter) multimode cavities. J Microw Powta- Electiomagn Energy 32 161-170... 

Iskander MF, Smith RL, Andrade AOM, Kimrey H, Walsh LM (1994) FDTD simulation of microwave sintering of ceramics in multimode cavities. TREE Trans Microw Theory Tech 42 793-800... 

Fig. 2.18 A Confocal fluorescence microscope images of the QDs on (Aa) a flat gold film, (Ab) the conical Au array, and (Ac) the dimpled Au array. (Ad) 3D visualization of the fluorescence intensity in (Ac) [60]. The QD has an emission wavelength of 597 nm. The excitation laser source was a 543 nm HeNe laser. (B) Field snapshot image from FDTD simulation results of Au coated dimpled structure. (C) Plots for the near-zone field intensity versus time in the dimpled Au structure [60]. Reproduced with permission [60]. Copyright 2013, Royal Society of Chemistry...

Fig. 11.5 Focal length changes for various sizes of CHQ lenses by using the FDTD simulation results. The thickness/diameter ratios are constant (H/D = 0.35). (X = 472 nm) (Reproduced from Ref. [4] with kind permission of Nature Publishing Group)...

Uzayisenga, V., Lin, X.D., Li, L.M. et al (2012) Synthesis, characterization, and 3D-FDTD simulation of AgOSiOj nanoparticles for shell-isolated nanoparticle-enhanced Raman spectroscopy. Langmuir, 28, 9140-9146. 

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