Projects per year
Organization profile
Organisation profile
We are a group of enthusiastic multidisciplinary young researchers from both the Departments of Applied Physics and Photonics (TONA) and Physics (DNTK). We use experimental and theoretical methods (nonlinear dynamics, stochastic processes, complex systems, electromagnetism, general relativity, etc.) to tackle and answer some fundamental challenges about nonlinear, complex and time-evolving systems. This combination allows an imaginative and insightful approach to problems, thereby avoiding the "fundamental-applied" polarisation. Besides photonic systems (such as e.g. semiconductor lasers) we also study other dynamical (e.g. biological) systems. The current areas of research are: - Dynamics of semiconductor lasers: nonlinear dynamics, bifurcation theory and stochastic processes are used in lasers, in particular semiconductor lasers. This theoretical study allows us to study the dynamic behaviour (e.g. bi- and multi-stability, excitability) of semiconductor lasers. These theoretical predictions are then tested experimentally in our labs. - Coherence properties of lasers: experimental and theoretical study of coherence properties of semiconductor lasers, and research into methods to modify and control the spatial coherence. In this way, we can generate spatially incoherent emission of a laser source. In our research we try to understand, model, optimize and apply this unique emission regime in innovative applications. - Metamaterials: metamaterials are complex structures that are composed of small, resonant electric circuits. These building blocks are much smaller than the wavelength of light, therefore they determine the electromagnetic properties of materials like atoms do in natural materials. Several problems are studied, ranging from the simulation of elementary metamaterial building blocks, over photonic devices based on metamaterials, to the development of metamaterial-based systems using the techniques of transformation optics. - Dissipative solitons: we study structures that arise in extended spatial systems in nature, both patterns as well as localized structures (spatial or dissipative solitons). We investigate the dynamic behaviour of these solitons (in time and space), studying the fundamental principles and unravelling the underlying bifurcation structure. - Coupled networks with delay: we study (small) networks of systems (oscillators) coupled with a time lag (delay). With such systems, synchronization may occur in which the oscillators vibrate with the same frequency and/or phase. In particular, we look at the existence and stability of such synchronized solutions and the influence of network topology and the delay. Such systems also have universal data processing properties (Reservoir Computing or Liquid State Machines) that we investigate and attempt to explain. - Non-linear oscillators with delay: We have recently shown that such systems show universal information processing properties (reservoir computing or Liquid State Machines). With only one non-linear node, we can get the same information-processing performance as with a neural network consisting of 400 nodes. We now further investigate the information processing capacity and attempt to explain and implement information processing concepts based on delay-coupled systems. - Dynamics of biological systems: we are focusing on the dynamics of toxin-antitoxin systems in bacteria and archaea. In cooperation with Structural Biology Brussels, we study models for gene regulation and function in the cell with different techniques: differential equations, stochastic methods, etc. We also study the dynamics of ecoystems, like the human gut flora (together with the Raes lab).
Keywords
- complex systems
- nonlinear dynamics
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Network
Profiles
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Ian Bauwens
- Vrije Universiteit Brussel
- Applied Physics and Photonics - Academic, Doctoral scholarschip
- Faculty of Engineering
- Applied Physics
Person: Researcher, PhD, Doctoral student
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Rossana Bettoni
- Vrije Universiteit Brussel
- Physics - Undefined, Academic
- Faculty of Sciences and Bioengineering Sciences
- Applied Physics
Person: Researcher, PhD, Doctoral student
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Jan Danckaert
- Vrije Universiteit Brussel
- Rectorate - Undefined, Academic
- Applied Physics and Photonics - Academic
- Physics - Academic
- Applied Physics
Person: Researcher, Professor
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Sophie de Buyl
- Vrije Universiteit Brussel
- Biology - Academic
- Department of Bio-engineering Sciences - Academic
- Physics - Academic
- Applied Physics
Person: Researcher, Professor
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Vincent Ginis
- Vrije Universiteit Brussel
- Business technology and Operations - Academic
- Data Analytics Laboratory
- Applied Physics
Person: Researcher, Professor
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OZR3997: Bilateral cooperation within the framework of a joint doctoral project: benchfee for joint PhD VUB - KU Leuven, MULAMBA Maxime
6/09/22 → 5/09/26
Project: Fundamental
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OZR3996: Bilateral cooperation within the framework of a joint doctoral project: benchfee for joint PhD VUB - KU Leuven, GAMBA Emilio
6/09/22 → 5/09/26
Project: Fundamental
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OZR3995: Bilateral cooperation within the framework of a joint doctoral project: benchfee for joint PhD VUB - UGent, BAUWENS Ian
28/03/22 → 27/03/26
Project: Fundamental
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IOF3022: IOF GEAR: Artificial Intelligence Lab
Nowe, A., De Boer, B., Bogaerts, B., Beuls, K., Loeckx, J., Wiggins, G., Lenaerts, T., Vranken, W., Libin, P., Dooms, A., Barbé, K., Ginis, V., Verboven, S. & Van Droogenbroeck, F.
1/01/22 → 31/12/26
Project: Applied
Research output
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Model of neural induction in the ascidian embryo
Bettoni, R., Umulis, D. M. (ed.), Hudson, C., Williaume, G., Sirour, C., Yasuo, H., de Buyl, S. & Dupont, G., 3 Feb 2023, In: PLoS Computational Biology. 19, 2, p. 1-30 30 p., e1010335.Research output: Contribution to journal › Article › peer-review
Open Access -
Study of coupled self-sustained oscillators: circadian oscillations in cyanobacteria and powering of biological loads
Youmbi Fouego, D., 2023, 140 p.Research output: Thesis › PhD Thesis
Open AccessFile -
Brownian motion in a growing population of ballistic particles
Père, N. V. M., Buyl, P. D. & de Buyl, S., 23 Mar 2022, In: Physical Review E. 105, 3, 034133.Research output: Contribution to journal › Article › peer-review
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Impact of phase modulation on the performance of photonic delay-based reservoir computing with semiconductor lasers
Bauwens, I., Harkhoe, K. K., Bienstman, P., Verschaffelt, G. & Van Der Sande, G., 6 Apr 2022.Research output: Unpublished contribution to conference › Poster
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Impact of phase modulation on the performance of photonic delay-based reservoir computing with semiconductor lasers
Bauwens, I., Harkhoe, K. K., Bienstman, P., Verschaffelt, G. & Van Der Sande, G., 25 May 2022, Impact of phase modulation on the performance of photonic delay-based reservoir computing with semiconductor lasers. Broderick, N. G. R., Dudley, J. M. & Peacock, A. C. (eds.). SPIE, Vol. 12143. p. 144-151 7 p. 121430L. (Proceedings of SPIE - The International Society for Optical Engineering; vol. 12143).Research output: Chapter in Book/Report/Conference proceeding › Conference paper
Activities
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A physics-inspired approach to overcome oscillatoryloss landscapes in the inverse design of optical components
Joeri Lenaerts (Speaker), Vincent Ginis (Contributor) & Hannah Pinson (Contributor)
26 Jan 2022Activity: Talk or presentation › Talk or presentation at a conference
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Marco Piccardo
Vincent Ginis (Host)
13 Sep 2022 → 14 Sep 2022Activity: Hosting a visitor › Hosting an academic visitor
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Chemistry (Organisational unit)
Tatiana Marianne Woller (Presenter), Mercedes Alonso Giner (Supervisor), Julia Contreras-García (Supervisor), Frank De Proft (Supervisor), Ulrich Hennecke (Chair), Freija De Vleeschouwer (Jury), Vanessa Labet (Jury), Monica Calatayud (Jury), Gabriel Merino (Jury), Eduard Matito (Jury) & Vincent Ginis (Jury)
31 Aug 2021Activity: Membership › Member of PhD committee
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Not all Ising Machines are Created Equal: Choice of Nonlinearity Induces Order-of-magnitude Differences in Computational Performance
Fabian Böhm (Speaker), Thomas Van Vaerenbergh (Contributor), Guy Verschaffelt (Contributor) & Guy Van Der Sande (Contributor)
27 Sep 2021Activity: Talk or presentation › Talk or presentation at a conference
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Reservoir Computing with ultrafast spin-lasers
Krishan Kumar Harkhoe (Speaker), Guy Van Der Sande (Contributor) & Guy Verschaffelt (Contributor)
5 Dec 2020Activity: Talk or presentation › Talk or presentation at a workshop/seminar