54 citations · 212 across the 13 of their papers we have counts for
14 papers
NumBAT: The integrated, open source Numerical Brillouin Analysis Tool
Björn C. P. Sturmberg, Kokou B. Dossou, Michael J. A. Smith +3
We describe NumBAT, an open-source software tool for modelling stimulated Brillouin scattering in waveguides of arbitrary cross-section. It provides rapid calculation of optical an…
Large field enhancement obtained by combining Fabry-Perot resonance and Rayleigh anomaly in photonic crystal slabs
Kokou B. Dossou
By applying the properties of Fabry-Perot resonance and Rayleigh anomaly, we have shown that a photonic crystal slab can scatter the light from an incident plane wave into a diffra…
Modal formulation for diffraction by absorbing photonic crystal slabs
Kokou B. Dossou, Lindsay C. Botten, Ara A. Asatryan +5
A finite element-based modal formulation of diffraction of a plane wave by an absorbing photonic crystal slab of arbitrary geometry is developed for photovoltaic applications. The…
Doppler shift generated by a moving diffraction grating under incidence by polychromatic diffuse light
Kokou B. Dossou
We consider the spectral response of moving diffraction gratings, in which the incident light extends over a broad angular range and where the diffracted light is observed from a s…
Total absorption of visible light in ultra-thin weakly-absorbing semiconductor gratings
Björn C. P. Sturmberg, Teck K. Chong, Duk-Yong Choi +7
The perfect absorption of light in subwavelength thickness layers generally relies on exotic materials, metamaterials or thick metallic gratings. Here we demonstrate that total lig…
Doppler shift generated by diffraction gratings under time-dependent incidence angle near a Wood anomaly
Kokou B. Dossou
Diffraction gratings are famous for their ability to exhibit, near a Wood anomaly, an arbitrarily large angular dispersion, e.g., with respect to the incidence angle or wavelength.…
Optimizing Photovoltaic Charge Generation of Nanowire Arrays: A Simple Semi-Analytic Approach
Björn C. P. Sturmberg, Kokou B. Dossou, Lindsay C. Botten +4
Nanowire arrays exhibit efficient light coupling and strong light trapping, making them well suited to solar cell applications. The processes that contribute to their absorption ar…
Absorption enhancing proximity effects in aperiodic nanowire arrays
Björn C. P. Sturmberg, Kokou B. Dossou, Lindsay C. Botten +4
Aperiodic Nanowire (NW) arrays have higher absorption than equivalent periodic arrays, making them of interest for photovoltaic applications. An inevitable property of aperiodic ar…
Nanowire array photovoltaics: Radial disorder versus design for optimal efficiency
Björn C. P. Sturmberg, Kokou B. Dossou, Lindsay C. Botten +4
Solar cell designs based on disordered nanostructures tend to have higher efficiencies than structures with uniform absorbers, though the reason is poorly understood. To resolve th…
Double-heterostructure cavities: from theory to design
Sahand Mahmoodian, J. E. Sipe, Christopher G. Poulton +4
We derive a frequency-domain-based approach for radiation (FAR) from double-heterostructure cavity (DHC) modes. We use this to compute the quality factors and radiation patterns of…
Supermodes of Hexagonal Lattice Waveguide Arrays
J. Scott Brownless, Felix J. Lawrence, Sahand Mahmoodian +3
We present a semi-analytical formulation for calculating the supermodes and corresponding Bloch factors of light in hexagonal lattice photonic crystal waveguide arrays. We then use…
First-principles method for high- photonic crystal cavity mode calculations
Sahand Mahmoodian, J. E. Sipe, Christopher G. Poulton +4
We present a first-principles method to compute radiation properties of ultra-high quality factor photonic crystal cavities. Our Frequency-domain Approach for Radiation (FAR) can c…
A flexible Bloch mode method for computing complex band structures and impedances of two-dimensional photonic crystals
Felix J. Lawrence, Lindsay C. Botten, Kokou B. Dossou +2
We present a flexible method that can calculate Bloch modes, complex band structures, and impedances of two-dimensional photonic crystals from scattering data produced by widely av…
Bloch-mode extraction from near-field data in periodic waveguides
Sangwoo Ha, Andrey A. Sukhorukov, Kokou B. Dossou +3
We demonstrate that the spatial profiles of both propagating and evanescent Bloch-modes in a periodic structure can be extracted from a single measurement of electric field at the…