All Outputs (15)

Simultaneous Study of Fluorescence and Transmission Based on a Sensor with a Doped Optical Fibre (2023)
Conference Proceeding

The paper presents a model sensor system for the simultaneous measurement of fluorescence and transmission for potential application in medical diagnostics. The paper presents results connected with the test substance, fluorescein. The sensor used in... Read More about Simultaneous Study of Fluorescence and Transmission Based on a Sensor with a Doped Optical Fibre.

Fibre Optic Sensor Systems without Using Spectral Analysis (2023)
Conference Proceeding

The paper describes our investigations of some Fibre Bragg Grating (FBG) systems for measuring basic environmental parameters where a simple measurement of transmitted or reflected power provides an alternative to specialist interrogators. The work t... Read More about Fibre Optic Sensor Systems without Using Spectral Analysis.

Wireless Environment as a Service Enabled by Reconfigurable Intelligent Surfaces: The RISE-6G Perspective (2021)
Conference Proceeding

The design of 6th Generation (6G) wireless networks points towards flexible connect-and-compute technologies capable to support innovative services and use cases. Targeting the 2030 horizon, 6G networks are poised to pave the way for sustainable huma... Read More about Wireless Environment as a Service Enabled by Reconfigurable Intelligent Surfaces: The RISE-6G Perspective.

Bright Mid-Infrared (MIR) Photoluminescence Sources and their Application in Imaging and Sensing (2020)
Conference Proceeding

Mid-infrared (MIR) spectroscopy and imaging underpin many applications, ranging from industrial process monitoring to environmental analysis, and offer a new era in healthcare and clinical diagnostics. The spectral region from 1.5 to 12 μm is of inte... Read More about Bright Mid-Infrared (MIR) Photoluminescence Sources and their Application in Imaging and Sensing.

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.

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.

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.

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.

Analysis of a near field MIMO wireless channel using 5.6 GHz dipole antennas
Conference Proceeding

Understanding the impact of interference upon the performance of a multiple input multiple output (MIMO) based device is of paramount importance in ensuring a design is both resilient and robust. In this work the effect of element-element interferenc... Read More about Analysis of a near field MIMO wireless channel using 5.6 GHz dipole antennas.

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

Coupled parity-time symmetric cavities: results from transmission line modelling simulations
Conference Proceeding

This paper studies the impact of a dispersive gain/loss material model on Parity-Time (PT) coupled microresonator cavity structures using the time-domain Transmission-Line Modelling method. A modal analysis is also performed to compare the modal comp... Read More about Coupled parity-time symmetric cavities: results from transmission line modelling simulations.

Threshold preservation of PT-resonant structures in realistic-dispersive medium
Conference Proceeding

The impact of material dispersion in the performance of parity-time (PT) symmetric coupled microresonators is studied. The eigenfrequencies of the coupled PT-system are analysed for different dispersion parameter. We show that realistic dispersion pr... Read More about Threshold preservation of PT-resonant structures in realistic-dispersive medium.

Parity-Time coupled microresonators: Kramers-Kronig limitation
Conference Proceeding

In this talk, we use a KKE argument to show that the presence of dispersion alters the eigen-frequencies of coupled PT coupled microresonators, so that their eigen-frequencies are no longer complex conjugates after the EP.