Publications by Liza Carol Andrea Dunbar

Eflop: a Sparsity-aware Metric for Evaluating Computational Cost in Spiking and Non-spiking Neural Networks

Deploying energy-efficient deep neural networks on energy-constrained edge devices is an important research topic in both machine learning and circuit design communities. Both artificial neural networks (ANNs) and spiking neural networks (SNNs) have been p ...

IOP Publishing Ltd2025

Constrained Zero-Shot Neural Architecture Search on Small Classification Dataset

Liza Carol Andrea Dunbar

The rapid evolution of Deep Learning (DL) has brought about significant transformations across scientific domains, marked by the development of increasingly intricate models demanding powerful GPU platforms. However, edge applications like wearables and mo ...

IEEE2024

Hierarchical Training of Deep Neural Networks Using Early Exiting

Pascal Frossard, Liza Carol Andrea Dunbar, Ahmet Caner Yüzügüler, Yamin Sepehri

Deep neural networks (DNNs) provide state-of-the-art accuracy for vision tasks, but they require significant resources for training. Thus, they are trained on cloud servers far from the edge devices that acquire the data. This issue increases communication ...

Ieee-Inst Electrical Electronics Engineers Inc2024

VIVALDI: steel billet tracking with advanced computer vision

Liza Carol Andrea Dunbar

Our advanced computer vision system allows for the precise tracking of serial numbers on steel billets in challenging industrial settings. It combines cutting-edge hardware and machine learning, excelling in character recognition (99.8%) and localization w ...

SPIE2024

Plasmonic nanohole arrays on Si-Ge heterostructures: An approach for integrated biosensors

Liza Carol Andrea Dunbar, Hatice Altug, Dordaneh Etezadi, Cenk Ibrahim Özdemir

Nanohole array surface plasmon resonance (SPR) sensors offer a promising platform for high-throughput label-free biosensing. Integrating nanohole arrays with group-IV semiconductor photodetectors could enable low-cost and disposable biosensors compatible t ...

Spie-Int Soc Optical Engineering2016

Polarization sensitive silicon photodiodes using nanostructured metallic grids

Christian Santschi, Liza Carol Andrea Dunbar, Olivier Martin

In this paper, we present the design, fabrication, and characterization of wire grid polarizers. These polarizers show high extinction ratios and high transmission with structure dimensions that are compatible with current complementary metal-oxide-semicon ...

2009

Optical Transmission Properties of Corrugated Nanoscale Hole Arrays in Thin Gold Films

Jürgen Brugger, Liza Carol Andrea Dunbar, Mona Julia Katharina Klein

2008

Optical photonic crystal condensing device

Romuald Houdré, Benoît Lombardet, Liza Carol Andrea Dunbar

A photonic crystal structure for condensing electromagnetic radiation comprising a modulated square-shaped lattice and a corresponding condensing device are disclosed. ...

2006

Planar photonic crystals infiltrated with liquid crystals: optical characterization of molecule orientation

Romuald Houdré, Libero Zuppiroli, Rolando Ferrini, Barbara Wild, Liza Carol Andrea Dunbar, Vasily Zabelin

Nematic liquid crystals are infiltrated into InP-based planar photonic crystals. Optical measurements as a function of temperature and polarization are used to study the average director field configuration in the nanometer-size holes: a planar equilibrium ...

Opt. Soc. America2006

Liquid crystal infiltration of InP-based planar photonic crystals

Romuald Houdré, Frank Nüesch, Libero Zuppiroli, Rolando Ferrini, Barbara Wild, Liza Carol Andrea Dunbar

A procedure for the infiltration of planar photonic crystals (PhCs) with liquid crystals (LCs) is presented. InP-based PhCs are infiltrated with the nematic LC-K15 in a specially designed high-vacuum chamber. The infiltration technique is validated and sys ...

AIP2006

A quantitative analysis of self-collimation effects in planar photonics crystals

Romuald Houdré, Rolando Ferrini, Benoît Lombardet, Liza Carol Andrea Dunbar

2006

Tuneable planar photonic crystals

Romuald Houdré, Libero Zuppiroli, Rolando Ferrini, Barbara Wild, Liza Carol Andrea Dunbar

2006

Planar photonic crystals infiltrated with liquid crystals: tuning of the optical properties

Romuald Houdré, Libero Zuppiroli, Rolando Ferrini, Liza Carol Andrea Dunbar, Nicolas Le Thomas

2006

Tuning the optical properties of planar photonic crystals by liquid crystal infiltration

Romuald Houdré, Libero Zuppiroli, Rolando Ferrini, Barbara Wild, Liza Carol Andrea Dunbar

Recently there has been a growing amount of attention devoted to tuneable photonic crystals (PhCs) where the optical response of PhC structures can be dynamically modified. We will show how infiltrating planar PhCs with a synthetic organic material allows ...

SPIE2005

Propagation loss measurements and Fabry-Pérot mode analysis using out-of-plane light scattering in photonic crystals waveguides

Romuald Houdré, Rolando Ferrini, Benoît Lombardet, Liza Carol Andrea Dunbar

AIP American Institute of Physics2005

Fourier analysis of Bloch wave propagation in photonic crystals

Romuald Houdré, Rolando Ferrini, Benoît Lombardet, Liza Carol Andrea Dunbar

2005

Design, fabrication and optical characterisation of quantum cascade lasers at terahertz frequencies using photonic crystal reflectors

Romuald Houdré, Marcella Giovannini, Jérôme Faist, Rolando Ferrini, Liza Carol Andrea Dunbar

2005

Liza Carol Andrea Dunbar

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Eflop: a Sparsity-aware Metric for Evaluating Computational Cost in Spiking and Non-spiking Neural Networks

Constrained Zero-Shot Neural Architecture Search on Small Classification Dataset

Hierarchical Training of Deep Neural Networks Using Early Exiting

VIVALDI: steel billet tracking with advanced computer vision

Plasmonic nanohole arrays on Si-Ge heterostructures: An approach for integrated biosensors

Polarization sensitive silicon photodiodes using nanostructured metallic grids

Optical Transmission Properties of Corrugated Nanoscale Hole Arrays in Thin Gold Films

Optical photonic crystal condensing device

Planar photonic crystals infiltrated with liquid crystals: optical characterization of molecule orientation

Liquid crystal infiltration of InP-based planar photonic crystals

A quantitative analysis of self-collimation effects in planar photonics crystals

Tuneable planar photonic crystals

Planar photonic crystals infiltrated with liquid crystals: tuning of the optical properties

Tuning the optical properties of planar photonic crystals by liquid crystal infiltration

Propagation loss measurements and Fabry-Pérot mode analysis using out-of-plane light scattering in photonic crystals waveguides

Fourier analysis of Bloch wave propagation in photonic crystals

Design, fabrication and optical characterisation of quantum cascade lasers at terahertz frequencies using photonic crystal reflectors

Codirectional couplers in GaAs-based planar photonic crystals

Photonic Crystals for Far-Infrared Wavelength Quantum Cascade Lasers

Fabrication and optical characterization of photonic crystal quantum cascade laers at terahertz frequencies