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125 papers · 1 filter
Dynamics and stability conditions of semiconductor lasers under external optical feedback from both sides of the laser cavity
Mónica Far Brusatori, Nicolas Volet
To increase the spectral efficiency of coherent communication systems, lasers with ever-narrower linewidths are required as they enable higher-order modulation formats with lower b…
Time-resolved quantum beats in the fluorescence of helium resonantly excited by XUV radiation
AC LaForge, A Benediktovitch, V Sukharnikov +18
We report on the observation of time-resolved quantum beats in the helium fluorescence from the transition 1s3p -> 1s2s, where the initial state is excited by XUV free-electron las…
Causal Interaction between the subsurface rotation rate residuals and radial magnetic field in different timescales
Fadil Inceoglu, Rachel Howe, Paul T. M. Loto'aniu
We studied the presence and spatiotemporal characteristics and evolution of the variations in the differential rotation rates and radial magnetic fields in the Schwabe and Quasi-bi…
Improved stabilization scheme for extreme ultraviolet quantum interference experiments
Daniel Uhl, Andreas Wituschek, Ulrich Bangert +18
Interferometric pump-probe experiments in the extreme ultraviolet (XUV) domain are experimentally very challenging due to the high phase stability required between the XUV pulses.…
The Kepler IRIS Catalog: Image subtraction light curves for 9,150 stars in and around the open clusters NGC 6791 and NGC 6819
Isabel L. Colman, Timothy R. Bedding, Daniel Huber +1
The four-year Kepler mission collected long cadence images of the open clusters NGC 6791 and NGC 6819, known as "superstamps." Each superstamp region is a 200-pixel square that cap…
Polarization-independent optical spatial differentiation with a doubly-resonant one-dimensional guided-mode grating
Ali Akbar Darki, Søren Peder Madsen, Aurélien Dantan
We report on the design and experimental characterization of a suspended silicon nitride subwavelength grating possessing a polarization-independent guided-mode resonance at obliqu…