Searched for: author:"Wolfenbuttel, R.F."
(1 - 7 of 7)
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Costa, Adriana C. (author), Pimenta, Sara (author), Ribeiro, João F. (author), Silva, Manuel F. (author), Wolfenbuttel, R.F. (author), Dong, Tao (author), Yang, Zhaochu (author), Correia, José H. (author)
Minimally invasive medical devices can greatly benefit from Narrow Band Imaging (NBI) diagnostic capabilities, as different wavelengths allow penetration of distinct layers of the gastrointestinal tract mucosa, improving diagnostic accuracy and targeting different pathologies. An important performance parameter is the light intensity at a...
journal article 2019
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Ghaderi, M. (author), Karimi Shahmarvandi, Ehsan (author), Wolfenbuttel, R.F. (author)
The design and fabrication of wideband mid-infrared metamaterial absorbers are presented. The emphasis is put on the shape-tolerant design for using masked UV (i-line) lithography and CMOS-compatible fabrication to enable on-chip co-integration with detector and readout circuits in a MEMS foundry while maintaining wafer throughput. The...
journal article 2018
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Jiang, Bo (author), Ghaderi, M. (author), Bossche, A. (author), Visser, Jaco H. (author), Wolfenbuttel, R.F. (author)
Thermal impedance spectroscopy has been investigated as a non-destructive technique to determine the composition of ternary mixtures of biofuels. The principle of the thermal conductivity detector has been extended for measuring both the thermal conductivity and the thermal capacity of biofuel in the range between 1 to 100 Hz, using an AC...
conference paper 2017
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Ghaderi, M. (author), Karimishahmarvandi, E. (author), Ayerden, N.P. (author), Wolfenbuttel, R.F. (author)
Metamaterial absorbers are photonic structures composed of an array of sub-wavelength metallic patterns. Results in literature are usually based on structures of nominal dimensions, despite the significant effect of fabrication tolerances on performance. This research aims to identify the main sources of uncertainty and to investigate their...
conference paper 2017
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Ayerden, N.P. (author), Ghaderi, M. (author), Wolfenbuttel, R.F. (author)
The increasing demand for small, robust and low-cost gas sensors triggers the batch fabrication of highly selective and sensitive miniaturized devices. A linear variable optical filter (LVOF) based microspectrometer enables selectivity in a wide wavelength range, while maintaining the robustness and low cost. To achieve sensitivity in an LVOF...
journal article 2016
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Ayerden, N.P. (author), de Graaf, G. (author), Wolfenbuttel, R.F. (author)
A miniaturized methane (CH4) sensor based on nondispersiveinfrared absorption is realized in MEMS technology. A high level offunctional integration is achieved by using the resonance cavity of a linearvariable optical filter (LVOF) also as a gas absorption cell. For effectivedetection of methane at λ = 3.39 µm, an absorption path length of at...
journal article 2016
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Karimishahmarvandi, E. (author), Ghaderi, M. (author), Wolfenbuttel, R.F. (author)
A CMOS-compatible approach is presented for the fabrication of a wideband mid-IR metamaterial-based absorber on top of a Si3N4 membrane, which contains poly-Si thermopiles. The application is in IR microspectrometers that are intended for implementation in portable microsystem for use in absorption spectroscopy. Although Au is the conventional...
journal article 2016
Searched for: author:"Wolfenbuttel, R.F."
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