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Extracting modal field profiles from 3D unstructured transmission line modelling meshes for use as sources and observers (2017)
Journal Article
Sewell, P., Vukovic, A., Benson, T. M., & Meng, X. (2017). Extracting modal field profiles from 3D unstructured transmission line modelling meshes for use as sources and observers. IET Science, Measurements and Technology, 11(6), 780-785. https://doi.org/10.1049/iet-smt.2016.0357

Large-scale three-dimensional (3D) electromagnetic simulations are commonly used as design and investigation tools in a wide variety of technological fields. It is not uncommon for both excitations and observation quantities to be expressed in terms... Read More about Extracting modal field profiles from 3D unstructured transmission line modelling meshes for use as sources and observers.

Coupled electrothermal two-dimensional model for lightning strike prediction and thermal modeling using the TLM method (2017)
Journal Article
Elkalsh, A., Sewell, P., Benson, T. M., & Vukovic, A. (2017). Coupled electrothermal two-dimensional model for lightning strike prediction and thermal modeling using the TLM method. IEEE Journal on Multiscale and Multiphysics Computational Techniques, 2, 38-48. https://doi.org/10.1109/JMMCT.2017.2683066

This paper presents a fully coupled two-dimensional (2-D) multiphysics model for predicting the location of the arc discharge and lightning channel, and modeling its thermal and electrical behavior as a highly conductive plasma channel. The model mak... Read More about Coupled electrothermal two-dimensional model for lightning strike prediction and thermal modeling using the TLM method.

Complexity Reduction of Multiscale UTLM Cell Clusters (2017)
Journal Article
Sewell, P., Benson, T. M., Vukovic, A., & Meng, X. (2017). Complexity Reduction of Multiscale UTLM Cell Clusters. IEEE Journal on Multiscale and Multiphysics Computational Techniques, 2, 18-28. https://doi.org/10.1109/jmmct.2017.2670613

Time domain electromagnetic simulations employing unstructured tetrahedral meshes offer smooth boundary approximations and graded meshes for multiscale problems. However, multiscale effects may arise not only as a consequence of fine geometry, but al... Read More about Complexity Reduction of Multiscale UTLM Cell Clusters.

Theory and numerical modelling of parity-time symmetric structures in photonics: Introduction and grating structures in one dimension (2016)
Book Chapter
Phang, S., Benson, T. M., Susanto, H., Creagh, S. C., Gradoni, G., Sewell, P. D., & Vukovic, A. (2016). Theory and numerical modelling of parity-time symmetric structures in photonics: Introduction and grating structures in one dimension. In A. Agrawal, T. M. Benson, R. De La Rue, & G. Wurtz (Eds.), Recent trends in computational photonics (161-205). Springer. https://doi.org/10.1007/978-3-319-55438-9_6

A class of structures based on PT PT-symmetric Bragg gratings in the presence of both gain and loss is studied. The basic concepts and properties of parity and time reversal in one-dimensional structures that possess idealised material properties are... Read More about Theory and numerical modelling of parity-time symmetric structures in photonics: Introduction and grating structures in one dimension.

Installed antenna performance in airborne radomes of different profiles (2016)
Journal Article
Vukovic, A., Sewell, P., Meng, X., & Benson, T. M. (2016). Installed antenna performance in airborne radomes of different profiles. Applied Computational Electromagnetics Society Journal, 1(8),

In this paper, broadband interactions between an antenna and a radome are modelled using a full wave numerical solver. By accurately describing both the antenna and the radome geometry with a single numerical method, a comprehensive prediction of the... Read More about Installed antenna performance in airborne radomes of different profiles.

Parity-time symmetric chain resonators (2016)
Presentation / Conference Contribution
Phang, S., Vukovic, A., Creagh, S., Gradoni, G., Sewell, P., & Benson, T. M. Parity-time symmetric chain resonators. Presented at 7th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META 16)

A simple tight-binding model to study the band-structure of an infinite length Parity-time (PT) symmetric chain of resonators is presented in this paper. In the talk, we will investigate the impact of having a structure of finite length and consider... Read More about Parity-time symmetric chain resonators.

Experimental benchmarking of Unstructured Transmission Line Modelling (UTLM) method in modelling twisted wires (2016)
Journal Article
Meng, X., Sewell, P., Rahman, N. H., Vukovic, A., & Benson, T. M. (in press). Experimental benchmarking of Unstructured Transmission Line Modelling (UTLM) method in modelling twisted wires

In this paper the Unstructured Transmission Line Modelling (UTLM) method based on a tetrahedral mesh has been applied to modelling of the coupling between a single wire and a twisted wire pair. The effects of wire twisting on the crosstalk and coupli... Read More about Experimental benchmarking of Unstructured Transmission Line Modelling (UTLM) method in modelling twisted wires.

Electro-thermal modelling for plasmonic structures in the TLM Method (2016)
Journal Article
Elkalsh, A., Vukovic, A., Sewell, P., & Benson, T. M. (2016). Electro-thermal modelling for plasmonic structures in the TLM Method. Optical and Quantum Electronics, 48(4), https://doi.org/10.1007/s11082-016-0542-x

This paper presents a coupled electromagnetic-thermal model for modelling temperature evolution in nano-size plasmonic heat sources. Both electromagnetic and thermal models are based on the Transmission Line Modelling (TLM) method and are coupled thr... Read More about Electro-thermal modelling for plasmonic structures in the TLM Method.

Extended Capability Models for Carbon Fiber Composite (CFC) Panels in the Unstructured Transmission Line Modeling (UTLM) Method (2016)
Journal Article
Meng, X., Vukovic, A., Benson, T. M., & Sewell, P. (2016). Extended Capability Models for Carbon Fiber Composite (CFC) Panels in the Unstructured Transmission Line Modeling (UTLM) Method. IEEE Transactions on Electromagnetic Compatibility, 58(3), 811-819. https://doi.org/10.1109/TEMC.2016.2531791

© 2016 IEEE. An effective model of single- and multilayered thin panels, including those formed using carbon fiber composite (CFC) materials, is incorporated into the transmission line modeling (TLM) method. The thin-panel model is a one-dimensional... Read More about Extended Capability Models for Carbon Fiber Composite (CFC) Panels in the Unstructured Transmission Line Modeling (UTLM) Method.

Localized single frequency lasing states in a finite parity-time symmetric resonator chain (2016)
Journal Article
Phang, S., Vukovic, A., Creagh, S. C., Sewell, P., Gradoni, G., & Benson, T. M. (2016). Localized single frequency lasing states in a finite parity-time symmetric resonator chain. Scientific Reports, 6, Article e20499. https://doi.org/10.1038/srep20499

In this paper a practical case of a finite periodic Parity Time chain made of resonant dielectric cylinders is considered. The paper analyzes a more general case where PT symmetry is achieved by modulating both the real and imaginary part of the mate... Read More about Localized single frequency lasing states in a finite parity-time symmetric resonator chain.

Threshold manipulation in parity-time symmetric microresonator chain (2015)
Presentation / Conference Contribution
Phang, S., Vukovic, A., Creagh, S., Benson, T. M., Gradoni, G., & Sewell, P. D. Threshold manipulation in parity-time symmetric microresonator chain. Presented at 9th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics

This paper analyses the eigenfrequencies of an infinitely long chain of microresonators with PT symmetry. The results show that the depth of modulation of the real part of the refractive index can be used to control the threshold point of the PT stru... Read More about Threshold manipulation in parity-time symmetric microresonator chain.

Parity-time chain of whispering-gallery mode resonators (2015)
Presentation / Conference Contribution
Phang, S., Vukovic, A., Creagh, S., Benson, T. M., Gradoni, G., & Sewell, P. D. Parity-time chain of whispering-gallery mode resonators. Presented at META15, the 6th International Conference on Metamaterials, Photonic Crystals and Plasmonics

The paper analyses the dispersion characteristics of an infinitely long PT chain made of whispering gallery resonators with gain/loss modulation. The results show that the appearance of the threshold breaking point depends not only on both of couplin... Read More about Parity-time chain of whispering-gallery mode resonators.

Parity-time symmetric coupled microresonators with a dispersive gain/loss (2015)
Journal Article
Phang, S., Vukovic, A., Creagh, S. C., Benson, T. M., Sewell, P. D., & Gradoni, G. (2015). Parity-time symmetric coupled microresonators with a dispersive gain/loss. Optics Express, 23(9), 11493-11507. https://doi.org/10.1364/oe.23.011493

The paper reports on the coupling of Parity-Time (PT)-symmetric whispering gallery resonators with realistic material and gain/loss models. Response of the PT system is analyzed for the case of low and high material and gain dispersion, and also for... Read More about Parity-time symmetric coupled microresonators with a dispersive gain/loss.

Modeling curved carbon fiber composite (CFC) structures in the transmission-line modeling (TLM) method (2015)
Journal Article
Meng, X., Sewel, P., Phang, S., Vukovic, A., & Benson, T. (2015). Modeling curved carbon fiber composite (CFC) structures in the transmission-line modeling (TLM) method. IEEE Transactions on Electromagnetic Compatibility, 57(3), 384-390. https://doi.org/10.1109/TEMC.2015.2400055

A new embedded model for curved thin panels is developed in the transmission line modeling (TLM) method. In this model, curved panels are first linearized and then embedded between adjacent 2-D TLM nodes allowing for arbitrary positioning between adj... Read More about Modeling curved carbon fiber composite (CFC) structures in the transmission-line modeling (TLM) method.

A versatile all-optical parity-time signal processing device using a Bragg grating induced using positive and negative Kerr-nonlinearity (2015)
Journal Article
Phang, S., Vukovic, A., Benson, T. M., Susanto, H., & Sewell, P. (2015). A versatile all-optical parity-time signal processing device using a Bragg grating induced using positive and negative Kerr-nonlinearity. Optical and Quantum Electronics, 47(1), https://doi.org/10.1007/s11082-014-0012-2

The properties of gratings with Kerr nonlinearity and PT symmetry are investigated in this paper. The impact of the gain and loss saturation on the response of the grating is analysed for different input intensities and gain/loss parameters. Potentia... Read More about A versatile all-optical parity-time signal processing device using a Bragg grating induced using positive and negative Kerr-nonlinearity.

Practical limitation on operation of nonlinear parity-time Bragg gratings (2014)
Presentation / Conference Contribution
Phang, S., Vukovic, A., Susanto, H., Benson, T. M., & Sewell, P. Practical limitation on operation of nonlinear parity-time Bragg gratings. Presented at META14, the 5th International Conference on Metamaterials, Photonic Crystals and Plasmonics

The paper analyses the operation of PT Bragg gratings when the dielectric material is considered to be both dispersive and nonlinear and gain and loss are saturable. The paper demonstrates the application of the nonlinear PT Bragg Grating as an optic... Read More about Practical limitation on operation of nonlinear parity-time Bragg gratings.

Impact of dispersive and saturable gain/loss on bistability of nonlinear parity–time Bragg gratings (2014)
Journal Article
Phang, S., Vukovic, A., Susanto, H., Benson, T. M., & Sewell, P. (2014). Impact of dispersive and saturable gain/loss on bistability of nonlinear parity–time Bragg gratings. Optics Letters, 39(9), 2603-2606. https://doi.org/10.1364/ol.39.002603

We report on the impact of realistic gain and loss models on the bistable operation of nonlinear parity–time (PT) Bragg gratings. In our model we include both dispersive and saturable gain and show that levels of gain/loss saturation can have a signi... Read More about Impact of dispersive and saturable gain/loss on bistability of nonlinear parity–time Bragg gratings.

Saturable and dispersive parity-time symmetric directional coupler: a transmission-line modelling study (2014)
Presentation / Conference Contribution
Phang, S., Vukovic, A., Benson, T. M., Creagh, S., Sewell, P., & Gradoni, G. Saturable and dispersive parity-time symmetric directional coupler: a transmission-line modelling study. Presented at Transparent Optical Networks (ICTON), 2014 16th International Conference on

In this paper, numerical modelling of Parity-Time (PT) coupled waveguides is reported. The PT coupled waveguide structure consists of two coupled slab waveguides based on GaAs material with gain/loss material parameter models, including both dispersi... Read More about Saturable and dispersive parity-time symmetric directional coupler: a transmission-line modelling study.

Modelling of dispersive PT-symmetric Bragg grating (2014)
Presentation / Conference Contribution
Phang, S., Vukovic, A., Susanto, H., Benson, T. M., & Sewell, P. Modelling of dispersive PT-symmetric Bragg grating. Presented at Conference on Computation in Electromagnetics 2014, London, UK

This paper reports on the time-domain numerical model of a parity-time Bragg grating with saturated and dispersive gain. The model is compared against the ideal PT scenario where the gain is constant and unsaturated for all frequencies.