All Outputs (44)

Efficient Statistical Model for Predicting Electromagnetic Wave Distribution in Coupled Enclosures (2020)
Journal Article

The random coupling model (RCM) has been successfully applied to predicting the statistics of currents and voltages at ports in complex electromagnetic (EM) enclosures operating in the short-wavelength limit. Recent studies have extended the RCM to s... Read More about Efficient Statistical Model for Predicting Electromagnetic Wave Distribution in Coupled Enclosures.

Mid-infrared sources for biomedical applications based on chalcogenide glass fibres (2020)
Journal Article

Many important molecules show strong characteristic vibrational transitions in the mid-infrared (MIR) part of the electromagnetic spectrum. This leads to applications in spectroscopy, chemical and bio-molecular sensing, security and industry, especia... Read More about Mid-infrared sources for biomedical applications based on chalcogenide glass fibres.

Near-Field MIMO Communication Links (2018)
Journal Article

© 2004-2012 IEEE. A procedure to achieve near-field multiple input multiple output (MIMO) communication with equally strong channels is demonstrated in this paper. This has applications in near-field wireless communications, such as Chip-to-Chip (C2C... Read More about Near-Field MIMO Communication Links.

Theory and numerical modelling of parity-time symmetric structures in photonics: boundary integral equation for coupled microresonator structures (2017)
Book Chapter

The spectral behaviour and the real-time operation of Parity-Time (PT) symmetric coupled resonators are investigated. A Boundary Integral Equation (BIE) model is developed to study these structures in the frequency domain. The impact of realistic gai... Read More about Theory and numerical modelling of parity-time symmetric structures in photonics: boundary integral equation for coupled microresonator structures.

Design and characterization of a diamond-shaped monopole antenna (2017)
Journal Article

We report a new planar antenna design in the shape of a diamond. The performance of the antenna design is initially obtained through simulation, then fabricated, and its performance evaluated through experiment. Experimental characterization of the d... Read More about Design and characterization of a diamond-shaped monopole antenna.

Theory and numerical modelling of parity-time symmetric structures in photonics: Introduction and grating structures in one dimension (2016)
Book Chapter

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.

Parity-time symmetric chain resonators (2016)
Conference Proceeding

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.

Theory and numerical modelling of parity-time symmetric structures for photonics (2016)
Thesis

Localized single frequency lasing states in a finite parity-time symmetric resonator chain (2016)
Journal Article

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)
Conference Proceeding

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)
Conference Proceeding

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

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

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

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)
Conference Proceeding

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

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)
Conference Proceeding

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)
Conference Proceeding

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.

Ultrafast optical switching using parity-time symmetric Bragg gratings (2013)
Journal Article

This paper reports on time-domain modeling of an optical switch based on the parity–time (PT) symmetric Bragg grating. The switching response is triggered by suddenly switching on the gain in the Bragg grating to create a PT-symmetric Bragg grating.... Read More about Ultrafast optical switching using parity-time symmetric Bragg gratings.

Time-modulated gain and loss parity-time symmetric resonators
Conference Proceeding