304 citations · 2.8k across the 76 of their papers we have counts for
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Unsupervised Machine Learning to Classify the Confinement of Waves in Periodic Superstructures
Marek Kozoň, Rutger Schrijver, Matthias Schlottbom +2
We employ unsupervised machine learning to enhance the accuracy of our recently presented scaling method for wave confinement analysis [1]. We employ the standard k-means++ algorit…
Observation of light propagation through a three-dimensional cavity superlattice in a 3D photonic band gap
Manashee Adhikary, Marek Kozon, Ravitej Uppu +1
We experimentally investigate unusual light propagation inside a three-dimensional (3D) superlattice of resonant cavities that are confined within a 3D photonic band gap. Therefore…
Sensing the position of a single scatterer in an opaque medium by mutual scattering
Minh Duy Truong, Ad Lagendijk, Willem L. Vos
We investigate the potential of mutual scattering, i.e., light scattering with multiple properly phased incident beams, as a method to extract structural information from inside an…
Enhanced Secrecy in Optical Communication using Speckle from Multiple Scattering Layers
Alfredo Rates, Joris Vrehen, Bert Mulder +2
We study the secrecy of an optical communication system with two scattering layers, to hide both the sender and receiver, by measuring the correlation of the intermediate speckle g…
Optical Properties of Chiral Three-Dimensional Photonic Crystals made from Semiconductors
Shun Takahashi, Takeyoshi Tajiri, Yasuhiko Arakawa +2
We perform a theoretical and numerical study of the optical properties of both direct and inverse three-dimensional (3D) chiral woodpile structures, and a corresponding chiral Brag…
Controlled light scattering of a single nanoparticle by wavefront shaping
Peilong Hong, Willem L. Vos
Controlling light scattering by nanoparticles is fundamentally important for the understanding and the control of light with photonic nanostructures, as well as for nanoparticle sc…
Enhanced Absorption in thin and ultrathin silicon films by 3D photonic band gap back reflectors
Devashish Sharma, Shakeeb B. Hasan, Rebecca Saive +2
Since thin-film silicon solar cells have limited optical absorption, we explore the effect of a nanostructured back reflector to recycle the unabsorbed light. As a back reflector w…
Observation of mutual extinction and transparency in light scattering
Alfredo Rates, Ad Lagendijk, Ozan Akdemir +2
Interference of scattered waves is fundamental for modern light-scattering techniques, such as optical wavefront shaping. Recently, a new type of wavefront shaping was introduced w…
Spatially shaping waves to penetrate deep inside a forbidden gap
Ravitej Uppu, Manashee Adhikary, Cornelis A. M. Harteveld +1
It is well known that waves incident upon a crystal are transported only over a limited distance - the Bragg length - before being reflected by Bragg interference. Here, we demonst…
The local density of optical states in the 3D band gap of a finite photonic crystal
Charalampos P. Mavidis, Anna C. Tasolamprou, Shakeeb B. Hasan +5
A three-dimensional (3D) photonic band gap crystal is an ideal tool to completely inhibit the local density of optical states (LDOS) at every position in the crystal throughout the…
Deterministic and controllable photonic scattering media via direct laser writing
E. Marakis, R. Uppu, M. L. Meretska +3
Photonic scattering materials, such as biological tissue and white paper, are made of randomly positioned nanoscale inhomogeneities in refractive index that lead to multiple scatte…
Reflectivity of Finite 3D GaAs Photonic Band Gap Crystals
Takeyoshi Tajiri, Shun Takahashi, Cornelis A. M. Harteveld +3
We study the optical reflectivity of three-dimensional (3D) photonic band gap crystals with increasing thickness. The crystals consist of GaAs plates with nanorod arrays that are a…
Classical antennae, quantum emitters, and densities of optical states
William L Barnes, Simon A R Horsley, Willem L Vos
We provide a pedagogical introduction to the concept of the local density of optical states (LDOS), illustrating its application to both the classical and quantum theory of radiati…
Experimental probe of a complete 3D photonic band gap
Manashee Adhikary, Ravitej Uppu, Cornelis A. M. Harteveld +2
The identification of a complete three-dimensional (3D) photonic band gap in real crystals always employs theoretical or numerical models that invoke idealized crystal structures.…
Universal Validity Ranges of Diffusion Theory for Light and Other Electromagnetic Waves
Maryna L. Meretska, Ravitej Uppu, Ad Lagendijk +1
The well-known diffusion theory describes propagation of light and electromagnetic waves in complex media. While diffusion theory is known to fail both for predominant forward scat…
Systematic design of the color point of a white LED
Maryna L. Meretska, Gilles Vissenberg, Ad Lagendijk +2
Lighting is a crucial technology that is used every day. The introduction of the white light emitting diode (LED) that consists of a blue LED combined with a phosphor layer, greatl…
"Cartesian light": unconventional propagation of light in a 3D superlattice of coupled cavities within a 3D photonic band gap
Sjoerd A. Hack, Jaap J. W. van der Vegt, Willem L. Vos
We explore the unconventional propagation of light in a three-dimensional (3D) superlattice of coupled resonant cavities in a 3D photonic band gap crystal. Such a 3D cavity superla…
Three-dimensional photonic band gap cavity with finite support: enhanced energy density and optical absorption
D. Devashish, Oluwafemi Ojambati, Shakeeb B. Hasan +2
We study numerically the transport and storage of light in a 3D photonic band gap crystal doped by a single embedded resonant cavity. The crystal has finite support since it is sur…
3D spatially-resolved optical energy density enhanced by wavefront shaping
Peilong Hong, Oluwafemi S. Ojambati, Ad Lagendijk +2
We study the three-dimensional (3D) spatially-resolved distribution of the energy density of light in a 3D scattering medium upon the excitation of open transmission channels. The…
Finite size scaling of density of states in photonic bandgap crystals
Shakeeb Bin Hasan, Allard P. Mosk, Willem L. Vos +1
The famous vanishing of the density of states (DOS) in a band gap, be it photonic or electronic, pertains to the infinite-crystal limit. In contrast, all experiments and device app…
Non-Rayleigh distribution of reflected intensity from photonic crystals with disorder
Oluwafemi S. Ojambati, Elahe Yeganegi, Ad Lagendijk +2
Structural disorder results in multiple scattering in real photonic crystals, which have been widely used for applications and studied for fundamental interests. The interaction of…
Coherent Cerenkov radiation and laser oscillation in a photonic crystal
T. Denis, M. V. van Dijk, J. H. H. Lee +5
We demonstrate that photonic crystals can be used to generate powerful and highly coherent laser radiation when injecting a beam of free electrons. Using theoretical investigations…
Controlling the intensity of light in large areas at the interfaces of a scattering medium
Oluwafemi S. Ojambati, John T. Hosmer-Quint, Klaas-Jan Gorter +2
The recent advent of wave-shaping methods has demonstrated the focusing of light through and inside even the most strongly scattering materials. Typically in wavefront shaping, lig…
Energy density distribution of shaped waves inside scattering media mapped onto a complete set of diffusion modes
Oluwafemi S. Ojambati, Allard P. Mosk, Ivo M. Vellekoop +2
We show that the spatial distribution of the energy density of optimally shaped waves inside a scattering medium can be described by considering only a few of the lowest eigenfunct…