Dr. Ger de Graaf Profile

Dr. Ger de Graaf

at Technische Univ Delft

SPIE Involvement:

Author

Publications (17)

Proceedings Article | 27 April 2016 Paper

Paper

Analysis of the effect of stress-induced waviness in airgap-based optical filters

Mohammadamir Ghaderi, Ehsan Karimi Shahmarvandi, Ger de Graaf, Reinoud Wolffenbuttel

Proceedings Volume 9889, 98890A (2016) https://doi.org/10.1117/12.2227937

KEYWORDS: Optical filters, Finite-difference time-domain method, Finite element methods, Optical filters, Finite-difference time-domain method, Reflectors, Active optics, Refractive index, Microopto electromechanical systems, Microelectromechanical systems, Geometrical optics, Optical components, Surface roughness, Plasma enhanced chemical vapor deposition, Oxides, Silica, Semiconducting wafers, UV optics

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Proceedings Article | 27 April 2016 Paper

Paper

Design and fabrication of ripple-free CMOS-compatible stacked membranes for airgap optical filters for UV-visible spectrum

Mohammadamir Ghaderi, Ger de Graaf, Reinoud Wolffenbuttel

Proceedings Volume 9888, 98880R (2016) https://doi.org/10.1117/12.2227769

KEYWORDS: Optical filters, Interference filters, Thin films, Refractive index, Microelectromechanical systems, Fabry–Perot interferometers, Optical components, Optical filter design, Materials processing, Ultraviolet radiation, Dielectrics, Semiconducting wafers, Silica, Plasma enhanced chemical vapor deposition, Optical design, Etching, Microscopes, Scanning electron microscopy

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Proceedings Article | 27 April 2016 Paper

Paper

A highly miniaturized NDIR methane sensor

N. Ayerden, Ger de Graaf, Peter Enoksson, Reinoud Wolffenbuttel

Proceedings Volume 9888, 98880D (2016) https://doi.org/10.1117/12.2225924

KEYWORDS: Mirrors, Methane, Optical filters, Sensors, Absorption, Gases, Resonators, Microelectromechanical systems, Electronic filtering, Absorption spectroscopy, Fizeau interferometers, Mid-IR, Mirrors, Absorption filters, Light sources, Spectroscopy, Semiconducting wafers

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Proceedings Article | 18 April 2016 Presentation + Paper

Presentation + Paper

CMOS-compatible metamaterial-based wideband mid-infrared absorber for microspectrometer applications

Ehsan Karimi Shahmarvandi, Mohammadamir Ghaderi, N. Pelin Ayerden, Ger de Graaf, Reinoud Wolffenbuttel

Proceedings Volume 9883, 988309 (2016) https://doi.org/10.1117/12.2227800

KEYWORDS: Absorption, Metamaterials, Resonators, Mid-IR, Sensors, Dielectrics, Infrared detectors, Aluminum, Electron beam lithography, Silica, Magnetism, Metals, Gold

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Proceedings Article | 21 May 2015 Paper

Paper

Optical design and characterization of a gas filled MEMS Fabry-Perot filter

N. Pelin Ayerden, Mohammadamir Ghaderi, Ger de Graaf, Reinoud Wolffenbuttel

Proceedings Volume 9517, 95171N (2015) https://doi.org/10.1117/12.2178773

KEYWORDS: Optical filters, Mirrors, Fabry–Perot interferometers, Spectroscopy, Electronic filtering, Absorption, Resonators, Reflectivity, Reflectors, Silica

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Proceedings Article | 21 May 2015 Paper

Paper

Optical characterization of MEMS-based multiple air-dielectric blue-spectrum distributed Bragg reflectors

M. Ghaderi, N. P. Ayerden, G. de Graaf, R. Wolffenbuttel

Proceedings Volume 9517, 95171M (2015) https://doi.org/10.1117/12.2178609

KEYWORDS: Reflectivity, Reflectors, Oxides, Etching, Refractive index, Distributed Bragg reflectors, Optical design, Microopto electromechanical systems, Wafer-level optics, Microelectromechanical systems

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Proceedings Article | 8 May 2014 Paper

Paper

A blue optical filter for narrow-band imaging in endoscopic capsules

M. Silva, M. Ghaderi, L. Goncalves, G. de Graaf, R. Wolffenbuttel, J. Correia

Proceedings Volume 9129, 912915 (2014) https://doi.org/10.1117/12.2052593

KEYWORDS: Thin films, Optical filters, Silica, Refractive index, Transmittance, Endoscopy, Sputter deposition, Fabry–Perot interferometers, Blue light emitting diodes, Titanium dioxide

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Proceedings Article | 2 May 2014 Paper

Paper

Design, fabrication and characterization of LVOF-based IR microspectrometers

N. P. Ayerden, M. Ghaderi, M. Silva, A. Emadi, P. Enoksson, J. Correia, G. de Graaf, R. Wolffenbuttel

Proceedings Volume 9130, 91300T (2014) https://doi.org/10.1117/12.2052620

KEYWORDS: Silicon, Optical filters, Silica, Absorption, Sensors, Reflectors, Mirrors, Thin films, Fabry–Perot interferometers, Transmittance

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Proceedings Article | 9 May 2012 Paper

Paper

Design, fabrication and measurements with a UV linear-variable optical filter microspectrometer

Arvin Emadi, Huaiwen Wu, Ger de Graaf, Peter Enoksson, José Higino Correia, Reinoud Wolffenbuttel

Proceedings Volume 8439, 84390V (2012) https://doi.org/10.1117/12.922374

KEYWORDS: Ultraviolet radiation, Optical filters, Calibration, Lamps, Signal processing, Monochromators, Filtering (signal processing), Cameras, Mercury, Silica

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Proceedings Article | 9 May 2012 Paper

Paper

Design and implementation of IR microspectrometers based on linear-variable optical filters

Arvin Emadi, Huaiwen Wu, Ger de Graaf, Reinoud Wolffenbuttel

Proceedings Volume 8439, 84391O (2012) https://doi.org/10.1117/12.922320

KEYWORDS: Optical filters, Silica, Silicon, Infrared sensors, Detector arrays, Sensors, Infrared detectors, Semiconducting wafers, Spectroscopy, Absorption

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Proceedings Article | 14 May 2010 Paper

Paper

Spectral measurement using IC-compatible linear variable optical filter

Arvin Emadi, Semen Grabarnik, Huaiwen Wu, Ger de Graaf, Karin Hedsten, Peter Enoksson, Jose Higino Correia, Reinoud Wolffenbuttel

Proceedings Volume 7716, 77162G (2010) https://doi.org/10.1117/12.854548

KEYWORDS: Silica, Neon, Lamps, Cameras, Fabry–Perot interferometers, Optical filters, Sensors, Current controlled current source, Lithography, Titanium dioxide

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Proceedings Article | 14 May 2010 Paper

Paper

Thin film encapsulated 1D thermoelectric detector in an IR microspectrometer

Huaiwen Wu, Arvin Emadi, Ger de Graaf, Reinoud Wolffenbuttel

Proceedings Volume 7726, 772612 (2010) https://doi.org/10.1117/12.854182

KEYWORDS: Thermography, Etching, Thin films, Silicon carbide, Chemical elements, Detector arrays, Infrared sensors, Sensors, Bridges, Infrared detectors

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Proceedings Article | 14 May 2010 Paper

Paper

A CMOS 128-APS linear array integrated with a LVOF for highsensitivity and high-resolution micro-spectrophotometry

Chi Liu, Arvin Emadi, Huaiwen Wu, Ger de Graaf, Reinoud Wolffenbuttel

Proceedings Volume 7726, 772616 (2010) https://doi.org/10.1117/12.854584

KEYWORDS: Control systems, Photodetectors, Switches, Signal detection, Signal to noise ratio, Sensors, Interference (communication), Standards development, Optical filters, CMOS technology

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Proceedings Article | 28 April 2010 Paper

Paper

CMOS-compatible LVOF-based visible microspectrometer

Arvin Emadi, Huaiwen Wu, Ger de Graaf, Reinoud Wolffenbuttel

Proceedings Volume 7680, 76800W (2010) https://doi.org/10.1117/12.849844

KEYWORDS: Silica, Fabry–Perot interferometers, Etching, Dielectric mirrors, Spectroscopy, Photoresist materials, Optical filters, Lithography, Dielectrics, Titanium dioxide

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Proceedings Article | 28 April 2010 Paper

Paper

Encapsulated thermopile detector array for IR microspectrometer

Huaiwen Wu, Arvin Emadi, Ger de Graaf, Reinoud Wolffenbuttel

Proceedings Volume 7680, 76800Z (2010) https://doi.org/10.1117/12.849994

KEYWORDS: Etching, Thermography, Silicon carbide, Detector arrays, Bridges, Chemical elements, Thin films, Infrared imaging, Infrared detectors, Sensors

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Proceedings Article | 14 May 2008 Paper

Paper

IC-compatible microspectrometer using a planar imaging diffraction grating

S. Grabarnik, A. Emadi, H. Wu, G. De Graaf, G. Vdovin, R. Wolffenbuttel

Proceedings Volume 6992, 699215 (2008) https://doi.org/10.1117/12.781103

KEYWORDS: Spectroscopy, Diffraction gratings, Spectral resolution, Glasses, Diffraction, Optical design, Lithography, Image sensors, Imaging systems, Semiconducting wafers

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Proceedings Article | 14 May 2008 Paper

Paper

Concave diffraction gratings fabricated with planar lithography

S. Grabarnik, A. Emadi, H. Wu, G. De Graaf, R. Wolffenbuttel

Proceedings Volume 6992, 699214 (2008) https://doi.org/10.1117/12.781057

KEYWORDS: Diffraction gratings, Lithography, Spectrometers, Semiconducting wafers, Spectrographs, Microelectromechanical systems, Glasses, CCD cameras, Spectral resolution, Optical alignment

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Showing 5 of 17 publications

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