We report the observation of optical bistability in Si-based photonic crystal cavities operating around 4.5 μm. Time domain measurements indicate that the source of this optical bistability is thermal, with a time constant on the order of 5 μs. Quality (Q) factor improvement is shown by the use of surface treatments (wet processes and annealing), resulting in an increase of Q-factor from 11,500...

Four-wave mixing is observed in a silicon W1 photonic crystal waveguide. The dispersion dependence of the idler conversion efficiency is measured and shown to be enhanced at wavelengths exhibiting slow group velocities. A 12-dB increase in the conversion efficiency is observed. Concurrently, a decrease in the conversion bandwidth is observed due to the increase in group velocity dispersion in t...

Article27 July 2021Open Access Source DataTransparent process Torsin and NEP1R1-CTDNEP1 phosphatase affect interphase nuclear pore complex insertion by lipid-dependent lipid-independent mechanisms Julie Jacquemyn orcid.org/0000-0002-4524-5728 VIB-KU Leuven Center for Brain Disease Research, Leuven, Belgium Department of Neurosciences, KU Search more papers this author Joyce Foroozandeh Katlijn ...

Development of a 2D metamaterial that preferentially emits broadband circularly-polarized (CP) infrared radiation is hindered by the fact that orthogonal electric-field components are uncorrelated at the surface of the thermal emitter, a consequence of the fluctuation-dissipation theorem. We achieve broadband CP thermal emission by fabricating a meanderline quarter-wave retarder on a transparen...

•Opto-fUSI enables whole-brain analysis of functional connectivity•Collicular cell types activate distinct brain-wide networks and behaviors•Opto-fUSI revealed novel brain areas involved in collicular behaviors Neuronal are arranged circuits that guide behavior. In mice, the superior colliculus innervates a set targets direct orienting defensive actions. We combined ultrasound imaging (fUSI) wi...

Book The 82 ACS Colloid and Surface Science Symposium Page 1 of 321 Plenary Lecture I: Prof. Eric Kaler Presider: Orlin D. Velev North Carolina State University, Raleigh, NC Presider: Peter K. Kilpatrick University of Notre Dame, Notre Dame, IN 1. Micellar Networks Implications for Rheology and Biology Eric W. Kaler, Stony Brook University, Stony Brook, NY Many nonionic surfactants form micella...