Optical micro-machined ultrasound sensors with a silicon photonic resonator in a buckled acoustical membrane

Autor: Véronique Rochus, H. P. Urbach, P.L.M.J. van Neer, W.J. Westerveld, Xavier Rottenberg, Martin D. Verweij, S.M. Leinders, N. de Jong

Publikováno v: 2019 20th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE)

Future applications of ultrasonography in (bio-)medical imaging require ultrasound sensor matrices with small sensitive elements. Promising are opto-mechanical ultrasound sensors (OMUS) based on a silicon photonic ring resonator embedded in a silicon

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http://resolver.tudelft.nl/uuid:453c0a81-2251-4629-abe9-c65f523b4987

Adaptive Liver Stereotactic Body Radiation Therapy: Automated Daily Plan Reoptimization Prevents Dose Delivery Degradation Caused by Anatomy Deformations

Autor: Dennis R. Schaart, Y. Seppenwoolde, Sebastiaan Breedveld, Ben J.M. Heijmen, Alejandra Méndez Romero, S.M. Leinders

Publikováno v: International Journal of Radiation Oncology Biology Physics, 87(5), 1016-1021. Elsevier Inc.

To investigate how dose distributions for liver stereotactic body radiation therapy (SBRT) can be improved by using automated, daily plan reoptimization to account for anatomy deformations, compared with setup corrections only.For 12 tumors, 3 strate

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https://doi.org/10.1016/j.ijrobp.2013.08.009

Extension of Marcatili's analytical approach for rectangular silicon optical waveguides

Autor: W.J. Westerveld, Mirvais Yousefi, K.W.A. van Dongen, S.M. Leinders, H. P. Urbach

Publikováno v: Journal of Lightwave Technology, 14, 30, 2388-2401

Marcatili's famous approximate analytical description of light propagating through rectangular dielectric waveguides, published in 1969, gives accurate results for low-index-contrast waveguides. However, photonic integrated circuit technology has adv

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Demonstration of Large Coupling-Induced Phase Delay in Silicon Directional Cross-Couplers

Autor: W.J. Westerveld, S.M. Leinders, Mirvais Yousefi, H. Paul Urbach, Jose Pozo

Publikováno v: IEEE Journal of Selected Topics in Quantum Electronics, 20 (4), 2014

We investigate directional couplers in silicon-on-insulator photonic technology. We theoretically and experimentally demonstrate a large coupling-induced phase delay that occurs when nearly all light is coupled from one waveguide to the other, i.e.,

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http://resolver.tudelft.nl/uuid:a540b95b-1970-407e-b329-db829db22212

Characterization of optical strain sensors based on silicon waveguides

Autor: Erik Tabak, S.M. Leinders, Mirvais Yousefi, P.M. Muilwijk, W.J. Westerveld, P.J. Harmsma, T. C. van den Dool, Jose Pozo, K.W.A. van Dongen, H. P. Urbach

Publikováno v: Conference on Lasers and Electro-Optics Europe and International Quantum Electronics Conference, CLEO/Europe-IQEC 2013, 12-16 May 2013, Munich, Germany

Summary form only given. Strain gauges are widely employed in microelectromechanical systems (MEMS) for sensing of, for example, deformation, acceleration, pressure, or sound [1]. Such gauges are typically based on electronic piezoresistivity. We pro

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