Yoann Jestin

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Nonlinear optical processes are one of the most important tools in modern optics with a broad spectrum of applications in, for example, frequency conversion, spectroscopy, signal processing and quantum optics. For practical and ultimately widespread implementation, on-chip devices compatible with electronic integrated circuit technology offer great(More)
Controlling size and shape of materials on the nanoscale allows to engineer their physical properties. Indeed nanomaterials offer unique opportunities in engineering, microelectronics, life-science, and renewable energies. Conversion of sunlight to electricity is assumed to be of major importance for the supply of electrical energy for future generations.(More)
The serious serious sequelae of sprains of the knee and ankle makes it imperative for the therapist to have an early and precise diagnosis. The authors propose a means of exploring these joints with the aid of a simple set up. This new technology allows the radiologist, secure from direct or indirect radiation, to carry out a standardized examination of the(More)
We demonstrate orthogonally polarized photon pair generation via spontaneous non-degenerate four-wave-mixing (FWM) of orthogonally polarized pumps in a CMOS compatible micro-ring resonator by fully suppressing stimulated FWM. Photon coincidences and optical parametric oscillation are measured.
The authors report 3 cases of peri-cerebral fluid collection in infants. They emphasize the importance of anterior fontanelle real-time ultrasonography to set up the diagnosis and for the follow up of these patients. From a technical point of view they recommend the use of a water bag to facilitate the examination.
Comparison of diagnostic accuracy using the two methods showed scanner imaging to provide superior results, with confirmation of herniated disc in 90 p. 100 cases based on purely discal semiological features. Limitations of the method result from the absence of epidural fat (narrow lumbar canals). A new hierarchy of radiological explorations in resistant(More)
Ultrasonic appearances of various types of gallbladder stones are described and findings on ultrasonic imaging of the main complications of biliary lithiasis analyzed. New possibilities for examination of the principal biliary pathway are being opened up by progress in improving resolution of the ultrasonoscope and by advances in knowledge of ultrasonic(More)
*Corresponding Author: Lucia Caspani: Institut National de la Recherche Scientifique Énergie Matériaux et Télécommunications, Université du Québec, 1650 Boulevard Lionel-Boulet, Varennes, Québec, Canada J3X 1S2 and Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK, E-mail: lucia.caspani@gmail.com *Corresponding(More)
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