Results 31 to 40 of about 3,183 (273)

Coherent Ray Tracing Simulation Of Non-Imaging Laser Beam Shaping With Multi-Aperture Elements [PDF]

EPJ Web of Conferences, 2019
The application of laser light sources for illumination tasks like in mask aligner lithography relies on non-imaging optical systems with multi-aperture elements for beam shaping.
Kirner Raoul, Noell Wilfried, Scharf Toralf, Voelkel Reinhard   +3 more
doaj   +1 more source

Reactive Ion Etching (RIE) Induced Surface Roughness Precisely Monitored In-Situ and in Real Time by Reflectance Anisotropy Spectroscopy (RAS) in Combination with Principle Component Analysis (PCA)

Advances in Materials Science and Engineering, 2022
Reactive ion etching (RIE) of group IV or III/V semiconductors is an important step in many lithographic processes in semiconductor technology. Typically, surface roughness is undesired, but more and more applications arise where rough surfaces are used ...
Emerson Oliveira, Johannes Strassner, Christoph Doering, Henning Fouckhardt   +3 more
doaj   +1 more source

Microlenses with annular amplitude and phase masks [PDF]

Journal of the European Optical Society-Rapid Publications, 2007
We present theoretical and experimental investigations of microlenses with both amplitude and phase masks. The light field in the focal region has been measured with a high resolution Mach–Zehnder interferometer with z–scan. The experimental results show
Paeder V., Scharf T., Ruffieux P., Herzig H.–P., Voelkel R., Weible K. J.   +5 more
doaj   +1 more source

Morphology‐Directed Light Emission from Fluorescent Janus Colloids for Programmable Chemical‐To‐Optical Signal Transduction

Advanced Optical Materials, Volume 11, Issue 22, November 20, 2023., 2023
Microscale fluorescent Janus emulsions exhibit dynamically tunable, angle‐dependent light‐emission profiles that depend significantly on their composition and morphology. Informed by theoretical ray‐tracing calculations and closely matching experimental results, both the collection of incident light and the confinement of emitted light from inside the ...
Bradley D. Frank, Sara Nagelberg, Agata W. Baryzewska, Pablo Simón Marqués, Markus Antonietti, Mathias Kolle, Lukas Zeininger   +6 more
wiley   +1 more source

Covalent Adaptable Microstructures via Combining Two‐Photon Laser Printing and Alkoxyamine Chemistry: Toward Living 3D Microstructures

Advanced Functional Materials, Volume 33, Issue 39, September 26, 2023., 2023
A novel ink system is presented allowing the fabrication of “living” microstructures using two‐photon laser printing and covalent adaptable chemistry of alkoxyamines. By application of nitroxide mediated polymerization and nitroxide exchange reaction mechanical properties as well as size of the microstructures are adjustable, while maintaining finest ...
Yixuan Jia, Christoph A. Spiegel, Alexander Welle, Stefan Heißler, Elaheh Sedghamiz, Modan Liu, Wolfgang Wenzel, Maximilian Hackner, Joachim P. Spatz, Manuel Tsotsalas, Eva Blasco   +10 more
wiley   +1 more source

Epitaxial Growth of Optoelectronically Active Ga(As)Sb Quantum Dots on Al-Rich AlGaAs with GaAs Capsule Layers

Advances in Materials Science and Engineering, 2021
We present a study of optoelectronically active Ga(As)As quantum dots (QDs) on Al-rich AlxGa1-xAs layers with Al concentrations up to x = 90%. So far, however, it has not been possible to grow optoelectronically active Ga(As)As QDs epitaxially directly ...
Johannes Strassner, Johannes Richter, Thomas Loeber, Christoph Doering, Henning Fouckhardt   +4 more
doaj   +1 more source

Facile Handling of 3D Two‐Photon Polymerized Microstructures by Ultra‐Conformable Freestanding Polymeric Membranes

Advanced Functional Materials, Volume 33, Issue 39, September 26, 2023., 2023
The applicability of direct laser writing by two‐photon polymerization (2PP) is extended to non‐planar substrates. The presented technique transfers 2PP 3D structures to complex surfaces by exploiting polymeric ultra‐thin films which serve both as a sacrificial supporting layer and a final conformal adhesive on targeted interfaces.
Frank Marco den Hoed, Andrea Ottomaniello, Omar Tricinci, Luca Ceseracciu, Marco Carlotti, Patrizio Raffa, Virgilio Mattoli   +6 more
wiley   +1 more source

Fabrication of Glass‐Ceramic 3D Micro‐Optics by Combining Laser Lithography and Calcination

Advanced Functional Materials, Volume 33, Issue 39, September 26, 2023., 2023
3D size and material rescaling: from polymer to glass‐ceramic. Abstract This perspective is an overview of a recent direction in optical 3D printing, where polymerization of crosslinkable materials and nanomaterial fillers can be guided to the final structures and new composites via high temperature annealing (HTA). Defining 3D nano/micro‐structures by
Giedrius Balčas, Mangirdas Malinauskas, Maria Farsari, Saulius Juodkazis   +3 more
wiley   +1 more source

Inkjet‐Printed Microlenses Integrated onto Organic Photodiodes for Highly Accurate Proximity Sensing

Advanced Sensor Research, Volume 2, Issue 8, August 2023., 2023
Printed microlenses are integrated onto organic photodiodes to enable the focus induced photoresponse effect for optical proximity measurements. By comparing the photocurrent ratio of a device with and without microlenses, absolute proximity measurements in the range of 100 μm–4 mm and an accuracy of down to ±50 μm within three standard deviations (3σ)
Mervin Seiberlich, Qiaoshuang Zhang, Ali Veysel Tunc, Kai Xia, Luis Arturo Ruiz‐Preciado, Stefan Schlisske, Konstantinos Falis, Noah Strobel, Uli Lemmer, Gerardo Hernandez‐Sosa   +9 more
wiley   +1 more source

Design of Micro Size Optical Scanner Systems [PDF]

Engineering and Technology Journal, 2012
The design and analysis of micro optical scanner systems are presented. A simulate software was implemented to study, firstly, the effects of miniaturization on the general optical properties of the system, secondly, the optical design and performance ...
Samira M. Arif, Mohamed S. Ahmed, Dayah N. Raouf   +2 more
doaj   +1 more source