Anders Pors
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View article: Calibration and performance of a Raman-based device for non-invasive glucose monitoring in type 2 diabetes
Calibration and performance of a Raman-based device for non-invasive glucose monitoring in type 2 diabetes Open
Raman spectroscopy has been demonstrated as a viable technique for non-invasive glucose monitoring (NIGM). However, its clinical utility is limited by an extended calibration period lasting several weeks. In this study, we address this lim…
View article: Accurate Post-Calibration Predictions for Noninvasive Glucose Measurements in People Using Confocal Raman Spectroscopy
Accurate Post-Calibration Predictions for Noninvasive Glucose Measurements in People Using Confocal Raman Spectroscopy Open
In diabetes prevention and care, invasiveness of glucose measurement impedes efficient therapy and hampers the identification of people at risk. Lack of calibration stability in non-invasive technology has confined the field to short-term …
View article: Suppression of near-field coupling in plasmonic antennas on epsilon-near-zero substrates
Suppression of near-field coupling in plasmonic antennas on epsilon-near-zero substrates Open
Epsilon-near-zero (ENZ) media are an emerging class of nanophotonic materials that engender electromagnetic fields with small phase variation due to their approximately zero permittivity. These quasi-static fields facilitate several unique…
View article: Critical-depth Raman spectroscopy enables home-use non-invasive glucose monitoring
Critical-depth Raman spectroscopy enables home-use non-invasive glucose monitoring Open
One of the most ambitious endeavors in the field of diabetes technology is non-invasive glucose sensing. In the past decades, a number of different technologies have been assessed, but none of these have found its entry into general clinic…
View article: Gradient metasurfaces: a review of fundamentals and applications
Gradient metasurfaces: a review of fundamentals and applications Open
In the wake of intense research on metamaterials the two-dimensional analogue, known as metasurfaces, has attracted progressively increasing attention in recent years due to the ease of fabrication and smaller insertion losses, while enabl…
View article: Third-order gap plasmon based metasurfaces for visible light
Third-order gap plasmon based metasurfaces for visible light Open
Efficient control and manipulation of light using metasurfaces requires high fabrication accuracy that becomes progressively demanding when decreasing the operation wavelength. Considering gap surface plasmon (GSP) based metasurfaces, we d…
View article: Beam-Size Invariant Spectropolarimeters Using Gap-Plasmon Metasurfaces
Beam-Size Invariant Spectropolarimeters Using Gap-Plasmon Metasurfaces Open
Metasurfaces enable exceptional control over the light with surface-confined planar components, offering the fascinating possibility of very dense integration and miniaturization in photonics. Here, we design, fabricate and experimentally …
View article: Gradient metasurfaces: fundamentals and applications
Gradient metasurfaces: fundamentals and applications Open
In the wake of intense research on metamaterials the two-dimensional analogue, known as metasurfaces, has attracted progressively increasing attention in recent years due to the ease of fabrication and smaller insertion losses, while enabl…
View article: Gold Photoluminescence Wavelength and Polarization Engineering
Gold Photoluminescence Wavelength and Polarization Engineering Open
We demonstrate engineering of the spectral content and polarization of photoluminescence (PL) from arrayed gold nanoparticles atop a subwavelength-thin dielectric spacer and optically-thick gold film, a configuration that supports gap-surf…
View article: Analog computing using reflective plasmonic metasurfaces
Analog computing using reflective plasmonic metasurfaces Open
Motivated by the recent renewed interest in compact analog computing using light and metasurfaces (Silva, A. et al., Science 2014, 343, 160-163), we suggest a practical approach to its realization that involves reflective metasurfaces cons…
View article: Scaling in light scattering by sharp conical metal tips
Scaling in light scattering by sharp conical metal tips Open
Using the electrostatic approximation, we analyze electromagnetic fields scattered by sharp conical metal tips, which are illuminated with light polarized along the tip axis. We establish scaling relations for the scattered field amplitude…
View article: Plasmonic metagratings for simultaneous determination of Stokes\n parameters
Plasmonic metagratings for simultaneous determination of Stokes\n parameters Open
Measuring light's state of polarization is an inherently difficult problem,\nsince the phase information between orthogonal polarization states is typically\nlost in the detection process. In this work, we bring to the fore the\nequivalenc…
View article: Gold Photoluminescence Wavelength and Polarization\nEngineering
Gold Photoluminescence Wavelength and Polarization\nEngineering Open
We\ndemonstrate engineering of the spectral content and polarization\nof photoluminescence (PL) from arrayed gold nanoparticles atop a subwavelength-thin\ndielectric spacer and optically thick gold film, a configuration that\nsupports gap-…
View article: Quantum Emitters near Layered Plasmonic Nanostructures:\nDecay Rate Contributions
Quantum Emitters near Layered Plasmonic Nanostructures:\nDecay Rate Contributions Open
We\nintroduce a numerical framework for calculating decay rate contributions\nwhen excited two-level quantum emitters are located near layered plasmonic\nnanostructures, particularly emphasizing the case of plasmonic nanostructures\natop m…
View article: Light extinction and scattering from individual and arrayed high-aspect-ratio trenches in metals
Light extinction and scattering from individual and arrayed high-aspect-ratio trenches in metals Open
We investigate the scattering properties of two-dimensional high-aspect-ratio metal trenches acting as resonators for gap-surface plasmons and show that these resonators are highly efficient scatterers of free waves, reaching at resonance …
View article: Enhanced nonresonant light transmission through subwavelength slits in metal
Enhanced nonresonant light transmission through subwavelength slits in metal Open
We analytically describe light transmission through a single subwavelength slit in a thin perfect electric conductor screen for the incident polarization being perpendicular to the slit, and derive simple, yet accurate, expressions for the…
View article: Unidirectional scattering by nanoparticles near substrates: generalized Kerker conditions
Unidirectional scattering by nanoparticles near substrates: generalized Kerker conditions Open
Starting from a general description of light scattering by a nanoparticle in homogeneous surroundings and situated near a substrate, we outline the connection to multipole expansion of scattered light and derive conditions and limits on ac…
View article: Gap plasmon-based phase-amplitude metasurfaces: material constraints [Invited]
Gap plasmon-based phase-amplitude metasurfaces: material constraints [Invited] Open
Gap surface plasmon (GSP) based metasurfaces, consisting of a subwavelength thin dielectric spacer sandwiched between a metal film and an array of metal nanobricks, have in recent years attracted considerable attention due to the ease of f…
View article: Plasmonic metagratings for simultaneous determination of Stokes parameters
Plasmonic metagratings for simultaneous determination of Stokes parameters Open
Measuring light’s state of polarization is an inherently difficult problem since the phase information between orthogonal polarization states is typically lost in the detection process. In this work, we bring to the fore the equivalence be…
View article: Gold Photoluminescence Wavelength and Polarization Engineering
Gold Photoluminescence Wavelength and Polarization Engineering Open
We demonstrate engineering of the spectral content and polarization of photoluminescence (PL) from arrayed gold nanoparticles atop a subwavelength-thin dielectric spacer and optically-thick gold film, a configuration that supports gap-surf…
View article: Quantum Emitters near Layered Plasmonic Nanostructures: Decay Rate Contributions
Quantum Emitters near Layered Plasmonic Nanostructures: Decay Rate Contributions Open
We introduce a numerical framework for calculating decay rate contributions when excited two-level quantum emitters are located near layered plasmonic nanostructures, particularly emphasizing the case of plasmonic nanostructures atop metal…