Prof. Fred van Keulen Profile

Prof. Fred van Keulen

at Technische Univ Delft

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Author

Publications (9)

Proceedings Article | 21 April 2016 Paper

Non-contact distance measurement and profilometry using thermal near-field radiation towards a high resolution inspection and metrology solution

Roy Bijster, Hamed Sadeghian, Fred van Keulen

Proceedings Volume 9778, 97780H (2016) https://doi.org/10.1117/12.2218877

KEYWORDS: Inspection, Metrology, Near field, Lenses, Sensors, Distance measurement, Microscopy, Image resolution, Heat flux, Near field optics, Near field scanning optical microscopy, Scanning probe metrology, Scanning probe microscopes, Scanning probe microscopy, Hyperlenses, Temperature metrology, Beam splitters, Silica, Semiconductor lasers, Neodymium, Radiative energy transfer

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Proceedings Article | 10 April 2015 Paper

Transient tip-sample interactions in high-speed AFM imaging of 3D nano structures

Aliasghar Keyvani, Hamed Sadeghian, Hans Goosen, Fred van Keulen

Proceedings Volume 9424, 94242Q (2015) https://doi.org/10.1117/12.2185848

KEYWORDS: Atomic force microscopy, Motion models, Silicon, Stereoscopy, Nanoimaging, 3D image processing, Inspection, Semiconductors, Oscillators

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Proceedings Article | 18 March 2015 Paper

Optimization methods for 3D lithography process utilizing DMD-based maskless grayscale photolithography system

Xiaoxu Ma, Yoshiki Kato, Yoshikazu Hirai, Floris van Kempen, Fred van Keulen, Toshiyuki Tsuchiya, Osamu Tabata

Proceedings Volume 9426, 94260F (2015) https://doi.org/10.1117/12.2084486

KEYWORDS: Photoresist materials, 3D microstructuring, Grayscale lithography, Photoresist developing, Optical lithography, Lithography, Digital micromirror devices, 3D acquisition, Error analysis, Standards development

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Proceedings Article | 6 March 2013 Paper

Robust optimization of 2x2 multimode interference couplers with fabrication uncertainties

Samee ur Rehman, Matthijs Langelaar, Fred Van Keulen

Proceedings Volume 8627, 862713 (2013) https://doi.org/10.1117/12.2000647

KEYWORDS: Brain-machine interfaces, Computer simulations, Integrated photonics, Optimization (mathematics), Waveguides, Instrument modeling, Wave propagation, Multimode interference devices, Etching, Refractive index

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Proceedings Article | 21 February 2013 Paper

Conformal transformation of photonic crystal structures

Marco Zocca, Matthijs Langelaar, Fred van Keulen

Proceedings Volume 8632, 863210 (2013) https://doi.org/10.1117/12.2002801

KEYWORDS: Waveguides, Photonic crystals, Dielectrics, Dispersion, Optimization (mathematics), Distortion, Radio propagation, Crystals, Neptunium, Computer simulations

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Proceedings Article | 18 April 2008 Paper

Insect-inspired wing actuation structures based on ring-type resonators

Caspar Bolsman, Johannes F. Goosen, Fred van Keulen

Proceedings Volume 6928, 69281I (2008) https://doi.org/10.1117/12.776084

KEYWORDS: Micro unmanned aerial vehicles, Actuators, Aerodynamics, Resonators, Numerical modeling, Model-based design, Prototyping, Electromagnetism, Photography, Mechanical engineering

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Proceedings Article | 10 April 2008 Paper

Potential of thermally expandable polymers with embedded skeletons for actuator applications

Gih-Keong Lau, Johannes Goosen, Trinh Chu Duc, Fred van Keulen

Proceedings Volume 6927, 69271D (2008) https://doi.org/10.1117/12.776238

KEYWORDS: Polymers, Actuators, Composites, Silicon, Polymeric actuators, Thermal effects, Epoxies, Thin films, Aluminum, Polymethylmethacrylate

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Proceedings Article | 20 February 2008 Paper

A mechanistic model for adsorption-induced change in resonance response of submicron cantilevers

H. Sadeghian, J. F. L. Goosen, A. Bossche, F. van Keulen

Proceedings Volume 6885, 68850E (2008) https://doi.org/10.1117/12.760913

KEYWORDS: Adsorption, Molecules, Resonators, Silicon, Sensors, Self-assembled monolayers, Proteins, Coating, Physics, Chemistry

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Proceedings Article | 27 April 2007 Paper

Design optimization of shape memory alloy active structures using the R-phase transformation

Matthijs Langelaar, Fred van Keulen

Proceedings Volume 6525, 65250W (2007) https://doi.org/10.1117/12.715558

KEYWORDS: Shape memory alloys, Optimization (mathematics), 3D modeling, Actuators, Finite element methods, Structural design, Temperature metrology, Computational modeling, Smart structures, Analytical research

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Showing 5 of 9 publications

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