25 citations · 43 across the 15 of their papers we have counts for
18 papers
Quantum cascade laser roadmap
Carlo Silvestri, Aleksandar D. Rakić, Dragan Indjin +46
Quantum cascade lasers (QCLs) are unipolar semiconductor lasers first demonstrated in 1994. Since then, they have played a central role in advancing mid-infrared and terahertz phot…
Optical feedback induced irregular and chaotic dynamics in terahertz quantum cascade laser combs
Xiaoqiong Qi, Carlo Silvestri, Thomas Taimre +1
In this work, we systematically investigate the optical feedback dynamics of terahertz (THz) frequency combs generated from quantum cascade lasers (QCLs) using the effective semico…
Detectorless 3D terahertz imaging: achieving subwavelength resolution with reflectance confocal interferometric microscopy
Jorge Silva, Martin Plöschner, Karl Bertling +18
Terahertz imaging holds great potential for non-destructive material inspection, but practical implementation has been limited by resolution constraints. In this study, we present…
Shaping terahertz harmonic frequency combs with frequency dependent external reflectors
Carlo Silvestri, Xiaoqiong Qi, Thomas Taimre +1
We present a method for engineering harmonic frequency combs (HFCs) in the terahertz spectral region. This approach involves interfacing a quantum cascade laser (QCL) with an exter…
Hawkes Models And Their Applications
Patrick J. Laub, Young Lee, Philip K. Pollett +1
The Hawkes process is a model for counting the number of arrivals to a system which exhibits the self-exciting property - that one arrival creates a heightened chance of further ar…
Frequency combs induced by optical feedback and harmonic order tunability in quantum cascade lasers
Carlo Silvestri, Xiaoqiong Qi, Thomas Taimre +1
This study investigates the interaction between frequency combs and optical feedback effects in Quantum Cascade Lasers (QCLs). The theoretical analysis reveals new phenomena arisin…
Logic-Based benders Decomposition for Wildfire Suppression
Mitchell G Harris, Michael A Forbes, Thomas Taimre
We study the problem of locating fire suppression resources in a burning landscape in order to minimise the total area burned. The landscape is modelled as a directed graph, with n…
Multi-mode Dynamics of Terahertz Quantum Cascade Lasers: spontaneous and actively induced generation of dense and harmonic coherent regimes
Carlo Silvestri, Xiaoqiong Qi, Thomas Taimre +1
We present an extended study concerning the dynamics of dense and harmonic coherent regimes in quantum cascade lasers (QCLs) in a Fabry--Perot (FP) configuration emitting in the te…
Combining Optimisation and Simulation Using Logic-Based Benders Decomposition
Michael Forbes, Mitchell Harris, Marijn Jansen +2
Operations research practitioners frequently want to model complicated functions that are are difficult to encode in their underlying optimisation framework. A common approach is t…
Exact simulation of extrinsic stress-release processes
Young Lee, Patrick J. Laub, Thomas Taimre +2
We present a new and straightforward algorithm that simulates exact sample paths for a generalized stress-release process. The computation of the exact law of the joint interarriva…
The Value of Information and Efficient Switching in Channel Selection
Jiesen Wang, Yoni Nazarathy, Thomas Taimre
We consider a collection of statistically identical two-state continuous time Markov chains (channels). A controller continuously selects a channel with the view of maximizing infi…
Rare Events in Random Geometric Graphs
Christian Hirsch, Sarat B. Moka, Thomas Taimre +1
This work introduces and compares approaches for estimating rare-event probabilities related to the number of edges in the random geometric graph on a Poisson point process. In the…
Rare tail approximation using asymptotics and polar coordinates
Thomas Taimre, Patrick J. Laub
In this work, we propose a class of importance sampling (IS) estimators for estimating the right tail probability of a sum of continuous random variables based on a change of varia…
Tail asymptotics of light-tailed Weibull-like sums
Søren Asmussen, Enkelejd Hashorva, Patrick J. Laub +1
We consider sums of i.i.d. random variables with tails close to for some . Asymptotics developed by Rootzén (1987) and Balkema, Klüppelberg & Resnick (1993)…
Transient Provisioning and Performance Evaluation for Cloud Computing Platforms: A Capacity Value Approach
Brendan Patch, Thomas Taimre
User demand on the computational resources of cloud computing platforms varies over time. These variations in demand can be predictable or unpredictable, resulting in `bursty' fluc…
Hawkes Processes
Patrick J. Laub, Thomas Taimre, Philip K. Pollett
Hawkes processes are a particularly interesting class of stochastic process that have been applied in diverse areas, from earthquake modelling to financial analysis. They are point…
A Correction Term for the Covariance of Renewal-Reward Processes with Multivariate Rewards
Brendan Patch, Yoni Nazarathy, Thomas Taimre
We consider a renewal-reward process with multivariate rewards. Such a process is constructed from an i.i.d.\ sequence of time periods, to each of which there is associated a multi…
Statistical Features in Learning
Ion-Olimpiu Stamatescu
We study some features of learning models based on "delayed" and undifferentiated reinforcement and realized by simple algorithms which may be considered of a very elementary natur…