Results 11 to 20 of about 3,183 (273)
Advances in Materials Science and Engineering, 2023 Reflectance anisotropy/difference spectroscopy (RAS/RDS) had been developed for monitoring epitaxial semiconductor growth, especially for the metal-organic chemical vapor deposition (MOCVD) of III/V semiconductors.
Henning Fouckhardt +3 more
doaj +2 more sources
Microoptical telescope compound eye
Optics Express, 2005 A new optical concept for compact digital image acquisition devices with large field of view is developed and proofed experimentally. Archetypes for the imaging system are compound eyes of small insects and the Gabor-Superlens. A paraxial 3x3 matrix formalism is used to describe the telescope arrangement of three microlens arrays with different pitch ...
Duparré, J. +8 more
openaire +5 more sources
Trace formula for a dielectric microdisk with a point scatterer [PDF]
, 2011 Two-dimensional dielectric microcavities are of widespread use in microoptics applications. Recently, a trace formula has been established for dielectric cavities which relates their resonance spectrum to the periodic rays inside the cavity. In the present paper we extend this trace formula to a dielectric disk with a small scatterer.
Hales, Robert F. M. +2 more
arxiv +7 more sources
Rainbows in a bottle: Realizing microoptic effects by polymerizable multiple emulsion particle design [PDF]
arXiv, 2023 In nature, structural colour generation is based on discriminative light propagation associated with physical structures in the range of the wavelengths of light1. These iridescent structural colours are of immense significance2 but not easy to control experimentally and therefore difficult to exploit for applications.
Naresh Yandrapalli +3 more
arxiv +3 more sources
Diffractive microoptics in porous silicon oxide by grayscale lithography
Optics ExpressWe demonstrate focusing as well as imaging using diffractive microoptics, manufactured by two-photon polymerization grayscale lithography (2GL), that have been 3D printed into porous silicon oxide.
Leander Siegle +4 more
openalex +2 more sources
Precise in situ etch depth control of multilayered III−V semiconductor samples with reflectance anisotropy spectroscopy (RAS) equipment [PDF]
Beilstein Journal of Nanotechnology, 2016 Reflectance anisotropy spectroscopy (RAS) equipment is applied to monitor dry-etch processes (here specifically reactive ion etching (RIE)) of monocrystalline multilayered III–V semiconductors in situ. The related accuracy of etch depth control is better
Ann-Kathrin Kleinschmidt +7 more
doaj +2 more sources
Fast vector wave optical simulation methods for application on 3D-printed microoptics [PDF]
. Additive manufacturing of microoptics using two-photon-lithography has been a rapidly advancing field of technology. Striving for ever more sophisticated optical systems prerequisites the access to appropriately fast and accurate wave-optical ...
Marco Wende +3 more
openalex +2 more sources
Mechanically tuneable microoptical structure based on PDMS
Sensors and Actuators A: Physical, 2009 AbstractA PDMS based tuneable microoptical system fabricated merging deep reactive ion etching, SU-8 and soft lithography, with a low-cost (mass-production), simple and highly repetitive technology, is presented. This system consists on a structure of two microlenses with uncoupled optical properties that can be mechanically actuated.
José Antonio Plaza +6 more
+8 more sources
Casimir attractive-repulsive transition in MEMS [PDF]
The European Physical Journal B 85, 377 (2012), 2012 Unwanted stiction in micro- and nanomechanical (NEMS/MEMS) systems due to dispersion (van der Waals, or Casimir) forces is a significant hurdle in the fabrication of systems with moving parts on these length scales. Introducing a suitably dielectric liquid in the interspace between bodies has previously been demonstrated to render dispersion forces ...
Boström, M. +5 more
arxiv +3 more sources
Technical Digest of the Twenty-Sixth Microoptics Conference [Front matter] [PDF]
Microoptics Conference, 2021 openalex +2 more sources