A5012166177- Random lasers and scattering media
- Photonic Crystals and Applications
- Advanced Optical Imaging Technologies
- Nanofabrication and Lithography Techniques
- Nonlinear Optical Materials Studies
- Advanced Fluorescence Microscopy Techniques
- Laser Material Processing Techniques
- Physical Unclonable Functions (PUFs) and Hardware Security
- Photonic and Optical Devices
- Ocular and Laser Science Research
- Optical Coherence Tomography Applications
- Orbital Angular Momentum in Optics
- Quantum optics and atomic interactions
- Optical Network Technologies
- Nonlinear Photonic Systems
- Optical Polarization and Ellipsometry
- Computer Graphics and Visualization Techniques
- Biometric Identification and Security
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Optic Sensors
- Neural Networks and Reservoir Computing
- Integrated Circuits and Semiconductor Failure Analysis
- Optical Coatings and Gratings
- Quantum Information and Cryptography
- Neuroscience and Neural Engineering
University of Twente
2017-2024
Foundation for Research and Technology Hellas
2016-2024
Photonic Systems (United States)
2015-2019
Strong scattering in the optical paths can be proactively exploited for determining light propagation and focusing through turbid media ultimately improve imaging manipulation capabilities. The use of shapers together with strongly structures enables production foci confined nanoscale or on other hand may provide significantly enhanced fields view. Exploiting this concept, we introduce ad hoc engineered structures, by direct femtosecond laser writing bulk glasses, presenting isotropy one...
Photonic scattering materials, such as biological tissue and white paper, are made of randomly positioned nanoscale inhomogeneities in refractive index that lead to multiple light. Typically these both naturally-occurring or man-made, formed through self assembly the inhomogeneities, which imposes challenges tailoring disorder hence optical properties. Here, We report on nanofabrication photonic media using direct laser writing with deterministic design. These consist submicron thick polymer...
Deterministic fabrication of random metamaterials requires filling a space with randomly oriented and positioned chords an on-average homogenous density orientation, which is nontrivial task. We describe method to generate fillings such chords, lines that run from edge the space, in any dimension. prove leads but homogeneous rotationally invariant circles, balls arbitrary-dimensional hyperballs other shapes as rectangles cuboids can be cut. briefly sketch historic context Bertrand's paradox...
We investigate the effect of a mirror-symmetry plane in multiple-scattering media under plane-wave illumination along symmetry plane. Designed and fabricated samples' optical transport properties are compared quantitatively with three-dimensional modeling. Strong polarization-dependent deviations bulk speckle-averaged intensity distribution at observed, showing either up to factor 2 enhancement or complete suppression ensemble-averaged intensities. derive analytical expressions for profiles...
We investigate the effect of a mirror-symmetry plane in multiple-scattering media under plane-wave illumination along symmetry plane. Designed and fabricated samples' optical transport properties are compared quantitatively with three-dimensional modeling. Strong polarization-dependent deviations bulk speckle-averaged intensity distribution at observed, showing either up to factor two enhancement or complete suppression ensemble-averaged intensities. derive analytical expressions for...
We developed a small form factor, microscope objective like, wavefront shaping assisted optical device (Wavelens) to produce and control illumination patterns for use on Light-Sheet Fluorescence Microcopy (LSFM). characterize it demonstrate its capability perform in vivo imaging using fluorescently labeled specimens, outperforming conventional optics.
Summary form only given. Authentication of people or objects using physical keys is insecure against secret duplication. Physical unclonable functions (PUF) are special that assumed to be due the large number degrees freedom in their manufacturing [1]. Opaque scattering media, such as white paint and teeth, comprise millions nanoparticles a random arrangement. Under coherent light illumination, multiple from these gives rise complex interference resulting speckle pattern. The pattern...
Over the last two decades, direct laser writing (DLW) has developed into one of most versatile techniques for fabrication nanophotonic structures [1]. DLW employs an ultrafast optical pulse, which is focused tightly in a transparent photoresist. This focus locally induces non-linear absorption that initiates polymerization 3D volume resist. Continuous development led to commercial nanofabrication systems with around 100 nm lateral resolution. Inspection results, however, poses challenge:...
The cover presents a rendering of the nanofabrication design used to make random, but on-average homogeneous distribution lines (chords) running from side in cubic volume. This structurally stable was by Pepijn W. H. Pinkse and co-workers (see article number 2001438) fill (20 μm)3 sized cube with polymer bars two-photon direct laser writing realizing deterministic optical multiple-scattering medium. four structures foreground are part series made for transmission measurements. individual...
We discuss the design and fabrication of deterministic photonic scattering media using direct laser writing. Static measurements light transport calculations validate that parameters match model.
We explore wavefront shaping techniques to produce and control illumination patterns for use on Light-Sheet Fluorescence Microcopy (LSFM). demonstrate the of these perform <i>in vivo</i> imaging using fluorescently labeled specimens.
We explore wavefront shaping techniques to produce and control illumination patterns for use on Light-Sheet Fluorescence Microcopy (LSFM). demonstrate the of these perform in vivo imaging using fluorescently labeled specimens.