A framework for modeling the detailed optical response of thick, multiple segment, large format sensors for precision astronomy applications

Posted by klaurent Stanford

Kavli Affiliate: Andrew Rasmussen | Summary:Near-future astronomical survey experiments, such as LSST, possess system requirements of unprecedented fidelity that span photometry, astrometry and shape transfer. Some of these requirements flow directly to the array of science imaging sensors at the focal plane. Availability of high quality characterization data acquired in the course of our sensor […]


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Microbuckling of Fibrin Provides a Mechanism for Cell Mechanosensing

Posted by klaurent Caltech

Kavli Affiliate: David A. Tirrell | Summary:Biological cells sense and respond to mechanical forces, but how such a mechanosensing proccess takes place in a nonlinear inhomogeneous fibrous matrix remains unknown. We show that cells in a fibrous matrix induce deformation fields that propagate over a longer range than predicted by linear elasticity. Synthetic, linear elastic […]


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Secondary “Smile”-gap in the density of states of a diffusive Josephson junction for a wide range of contact types

Posted by klaurent Delft

Kavli Affiliate: Yu V. Nazarov | Summary:The superconducting proximity effect leads to strong modifications of the local density of states in diffusive or chaotic cavity Josephson junctions, which displays a phase-dependent energy gap around the Fermi energy. The so-called minigap of the order of the Thouless energy $E_mathrmTh$ is related to the inverse dwell time […]


Continue.. Secondary “Smile”-gap in the density of states of a diffusive Josephson junction for a wide range of contact types

Polarization degenerate micropillars fabricated by designing elliptical oxide apertures

Posted by klaurent UCSB

Kavli Affiliate: Larry Coldren | Summary:A method for fabrication of polarization degenerate oxide apertured micropillar cavities is demon- strated. Micropillars are etched such that the size and shape of the oxide front is controlled. The polarization splitting in the circular micropillar cavities due to the native and strain induced bire- fringence can be compensated by […]


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An Extension of the Faddeev-Jackiw Technique to Fields in Curved Spacetimes

Posted by klaurent MIT

Kavli Affiliate: Edmund Bertschinger | Summary:The Legendre transformation on singular Lagrangians, e.g. Lagrangians representing gauge theories, fails due to the presence of constraints. The Faddeev-Jackiw technique, which offers an alternative to that of Dirac, is a symplectic approach to calculating a Hamiltonian paired with a well-defined initial value problem when working with a singular Lagrangian. […]


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Synaptic polarity of the interneuron circuit controlling C. elegans locomotion

Posted by klaurent Caltech

Kavli Affiliate: Paul W. Sternberg | Summary:C. elegans is the only animal for which a detailed neural connectivity diagram has been constructed. However, synaptic polarities in this diagram, and thus, circuit functions are largely unknown. Here, we deciphered the likely polarities of 7 pre-motor neurons implicated in the control of worm’s locomotion, using a combination […]


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Strong interlayer coupling in van der Waals heterostructures built from single-layer chalcogenides

Posted by klaurent Berkeley

Kavli Affiliate: Ali Javey | Summary:Semiconductor heterostructures are the fundamental platform for many important device applications such as lasers, light-emitting diodes, solar cells and high-electron-mobility transistors. Analogous to traditional heterostructures, layered transition metal dichalcogenide (TMDC) heterostructures can be designed and built by assembling individual single-layers into functional multilayer structures, but in principle with atomically sharp […]


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