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Broadband efficient directional coupling to short-range plasmons: towards hybrid fiber nanotips
We present a broadband and efficient short-range plasmonic directional coupler design, for the delivery and collection of deeply sub-wavelength radiation to tapered plasmonic nanowires. We show a proof-of-concept...
PublicationsSuperconcentration of light: circumventing the classical limit to achievable irradiance
Concentration of light is limited by a fundamental physical principle, which ensures that étendue, the product of area and solid angle, can never decrease in an optical system. In microscopy, many superresolving...
PublicationsCharacterization and prediction of the mechanism of action of antibiotics through NMR metabolomics
Background The emergence of antibiotic resistant pathogenic bacteria has reduced our ability to combat infectious diseases. At the same time the numbers of new antibiotics reaching the market have decreased....
PublicationsDemonstration of a Homogeneous Yb-Doped Core Fully-Aperiodic Large-Pitch-Fiber Laser
The first demonstration of a 40 μm core homogeneously ytterbium-doped fully-aperiodic large-pitch-fiber (FALPF) laser is reported on here. In this concept, the amplification of unwanted high-order modes...
PublicationsRapid acquisition of mean Raman spectra of eukaryotic cells for a robust single cell classification
Raman spectroscopy has previously been used to identify eukaryotic and prokaryotic cells. While prokaryotic cells are small in size and can be assessed by a single Raman spectrum, the larger size of eukaryotic...
PublicationsDistinction of Ecuadorian varieties of fermented cocoa beans using Raman spectroscopy
Cocoa (Theobroma cacao) is a crop of economic importance. In Ecuador, there are two predominant cocoa varieties: National and CCN-51. The National variety is the most demanded, since its cocoa beans are...
PublicationsIntegration of 3D multimodal imaging data of a head and neck cancer and advanced feature recognition
In the last years, matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDIMSI) became an imaging technique which has the potential to characterize complex tumor tissue. The combination...
PublicationsIndex matching at the nanoscale: light scattering by core–shell Si/SiOx nanowires
Silicon nanowires (SiNWs) show strong resonant wavelength enhancement in terms of absorption as well as scattering of light. However, in most optoelectronic device concepts the SiNWs should be isolated...
PublicationsAssessment of growth phases of the diatom Ditylum brightwellii by FT-IR and Raman spectroscopy
Most applications of monitoring microalgae necessitate fast deployable and sensitive methods to assess cellular physiology, preferably at the scale of single cells. Vibrational spectroscopies, namely Fourier...
PublicationsImproving the axial and lateral resolution of three-dimensional fluorescence microscopy using random speckle illuminations
We consider a fluorescence microscope in which several three-dimensional images of a sample are recorded for different speckle illuminations. We show, on synthetic data, that by summing the positive deconvolution...
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