Mathias FINK - Institut d'études scientifiques de Cargèse (IESC)

More documents

Recommendations

Info

$flow abd transport in porous and fractured media:development ...$

Schedule Time\Day Monday Tuesday Wednesday Thurday Friday 9h-10h30 Mathias Fink John Page Georg Maret Ad Lagendijk Nick Zheludev 11h-12h30 David Miller Martin Wegener Hui Cao Lihong Wang Moti Segev 12h30-16h30 16h30-17h30 Lunch + Discussions + Beach Allard Mosk Lunch + Discussions + Beach Rémi Carminati 17h30-18h30 Didier Felbacq Vincent Laude Welcome drink (6:30 pm) Lunch + Poster Session (13h30-17h) José Sanchez- Dehesa (17h-18h30) Lunch + Discussions + Beach Sergey Skipetrov Claude Boccara Diner (7:30pm) Lunch Stefan Enoch (13h30-14h30) Sylvain Gigan (14h30-15h30) THE END The abstracts of the lectures are available at http://www.institutlangevin.espci.fr/Program,609 Lecture titles Pr. Hui Cao Pr. Mathias Fink Pr. Ad Lagendijk Pr. Georg Maret Pr. David A.B. Miller Pr. John Page Pr. Morchedaï Segev Pr. Lihong Wang Pr. Martin Wegener Pr. Nikolay Zheludev Pr. Claude Boccara Pr. Rémi Carminati Pr. Didier Felbacq Dr. Sylvain Gigan Dr. Stefan Enoch Pr. Vincent Laude Pr. Allard Mosk Pr. José Sánchez-Dehesa Dr. Sergey Skipetrov Light transport through random media: Physics and application Transition to Anderson localization of light in three dimensions How to design any linear optical component and how to avoid it? Anderson Localization of Ultrasound in Three-Dimensional Mesoglasses Anderson Localization of Light and Beyond Synergy between light and sound : photoacoustic tomography and TRUE optical focusing Transformation materials for optics, elastodynamics, and thermodynamics What’s matter with meta matter? Random behavior in optical coherence Weak and strong coupling regimes of light-matter interaction in nanoscale Universality and scaling in topological metamaterials Matricial approach to optical wavefront engineering Scaling up the holes : Towards Seismic metamaterials Phononic crystals for the control of acoustic waves Recent advances on acoustic metamaterials Quantum optical resources for imaging and wave control in random media
Pr. Hui Cao Light transport through random media : physics and application The first part is the fundamental study of light transport through disordered photonic waveguides. We have observed position-dependent diffusion by probing light propagating inside a quasi-twodimensional random system from the third dimension. The system size and shape are designed to enhance the interference of scattered waves so that the diffusion coefficient is modified appreciably. We also use dissipation to control the effective system size, and tune the value of diffusion coefficient via the interplay of localization and dissipation. This work demonstrates the possibility of utilizing the geometry of a random system or the dissipation to manipulate wave diffusion. The second part is the application of random media to spectrograph. We have designed and fabricated an on-chip spectrometer based on random arrays of scatterers. The speckle patterns are recorded and used to reconstruct the input spectra after the spectral-spatial mapping is calibrated. Multiple scattering of light increases the effective optical path length, facilitating the spectral decorrelation of speckle. It allows us to dramatically reduce the device size without sacrificing spectral resolution. To reduce the insertion loss, we incorporate certain degree of order to the random spectrometer. We have also used the speckle generated by a multimode optical fiber to recover the input spectra. This fiber spectrometer gives high-resolution and has low-loss. A wavelength resolution of 8 pm is achieved with a 20 meter long fiber and a broadband operation covering the visible spectrum is obtained with 1.5 nm resolution using a 2cm long fiber. Pr. Georg Maret Transition to Anderson localization of light in three dimensions Georg Maret, Wolfgang Bührer, Tilo Sperling and Christof Aegerter We report experiments on the time resolved transmission of multiple scattered light in strongly turbid three dimensional media composed of high index (titania) nanoparticles. At small values of kl*, with wave vector k and transport mean free path l*, and at long times the total transmission is delayed [1] and the width of the intensity profile at the backside of the sample saturates [2]. These deviations from diffusive transport which cannot be accounted for by absorption indicate a transition to 3D Anderson localization. Data for samples with different thickness and turbidity provide a direct determination of their localization length as function of kl* and allow to determine the critical value kl*c of the transition. We also discuss the spectral and power dependence of the transmission which reveal the presence of nonlinear effects [3]. [1] M. Störzer, P. Gross, C.M. Aegerter and G. Maret, Phys.Rev.Lett. 96, 063904 (2006). [2] T. Sperling, W. Bührer, C.M. Aegerter and G. Maret, Nature Photonics, 7, 48-52 (2013) [3] W. Bührer et.al. to be published Pr. David A.B. Miller How to design any linear optical component and how to avoid it ? Any linear optical structure or device can be readily understood mathematically, but we have not known historically how to design any such device. For example, current challenging practical devices include efficient arbitrary spatial mode splitters and converters for multimode fiber and advanced free-space communications, especially avoiding any avoid fundamental power splitting loss. Here we show the first complete constructive method for design of an arbitrary linear optical device. In the spirit of a universal machine, this proves any linear optical device is possible in principle. We propose practical approaches for spatial devices. Finally, we show how all such actual design work can be avoided completely in systems that can configure themselves without
Page 1 and 2: 2013 27 Mai 31 Mai CONTROLLING WAVE
Page 3: Speakers • Hui Cao - Yale Univers
Page 7 and 8: Photoacoustic tomography (PAT), com
Page 9: holes drilled in a rather homogeneo

Mathias FINK - Institut d'études scientifiques de Cargèse (IESC)

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?