All Disciplines – Page 317 – Kavli Institute Pre-Print Publications

Flat silicon gradient index lens with 3-layer anti-reflection structures for millimeter and submillimeter wavelengths

Posted by dbos January 31, 2024February 12, 2024Caltech

Kavli Affiliate: Sunil Golwala | First 5 Authors: Fabien Defrance, Cecile Jung-Kubiak, John Gill, Sofia Rahiminejad, Ted Macioce | Summary: We present the design, fabrication, and test of a 100 mm diameter flat gradient-index (GRIN) lens fabricated with high-resistivity silicon and combined with three-layer anti-reflection (AR) structures optimized for 160 – 355 GHz. The anti-reflection […]

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Flat silicon gradient index lens with deep reactive-ion-etched 3-layer anti-reflection structure for millimeter and submillimeter wavelengths

Posted by dbos January 31, 2024Caltech

Kavli Affiliate: Sunil R. Golwala | First 5 Authors: Fabien Defrance, Cecile Jung-Kubiak, John Gill, Sofia Rahiminejad, Theodore Macioce | Summary: We present the design, fabrication, and characterization of a 100 mm diameter, flat, gradient-index (GRIN) lens fabricated with high-resistivity silicon, combined with a three-layer anti-reflection (AR) structure optimized for 160-355 GHz. Multi-depth, deep reactive-ion […]

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STAR: An Efficient Softmax Engine for Attention Model with RRAM Crossbar

Posted by dbos January 31, 2024February 12, 2024Peking

Kavli Affiliate: Jing Wang | First 5 Authors: Yifeng Zhai, Bing Li, Bonan Yan, Jing Wang, | Summary: RRAM crossbars have been studied to construct in-memory accelerators for neural network applications due to their in-situ computing capability. However, prior RRAM-based accelerators show efficiency degradation when executing the popular attention models. We observed that the frequent […]

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Hierarchical phased-array antennas coupled to Al KIDs: a scalable architecture for multi-band mm/submm focal planes

Posted by dbos January 31, 2024February 12, 2024Caltech

Kavli Affiliate: Sunil R. Golwala | First 5 Authors: Jean-Marc Martin, Junhan Kim, Fabien Defrance, Shibo Shu, Andrew D. Beyer | Summary: We present the optical characterization of two-scale hierarchical phased-array antenna kinetic inductance detectors (KIDs) for millimeter/submillimeter wavelengths. Our KIDs have a lumped-element architecture with parallel plate capacitors and aluminum inductors. The incoming light […]

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A universal pairing gap measurement proposal by dynamical excitations in 2D doped attractive Fermi-Hubbard model with spin-orbit coupling

Posted by dbos January 30, 2024Peking

Kavli Affiliate: Feng Yuan | First 5 Authors: Huaisong Zhao, Rui Han, Ling Qin, Feng Yuan, Peng Zou | Summary: By calculating dynamical structure factor of two-dimensional doped attractive Fermi-Hubbard model with Rashba spin-orbit coupling, we not only investigate collective modes and single-particle excitations of the system during the phase transition between Bardeen-Cooper-Schrieffer superfluid and […]

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Polarization properties of the 128 non-repeating fast radio bursts from the first CHIME/FRB baseband catalog

Posted by dbos January 30, 2024February 12, 2024MIT

Kavli Affiliate: Kiyoshi W. Masui | First 5 Authors: Ayush Pandhi, Ziggy Pleunis, Ryan Mckinven, B. M. Gaensler, Jianing Su | Summary: We present a 400-800 MHz polarimetric analysis of 128 non-repeating fast radio bursts (FRBs) from the first CHIME/FRB baseband catalog, increasing the total number of FRB sources with polarization properties by a factor […]

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Polarization properties of 128 non-repeating fast radio bursts from the first CHIME/FRB baseband catalog

Posted by dbos January 30, 2024MIT

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Spike transmission failures in axons from mouse cortical pyramidal neurons in vivo

Posted by dbos January 30, 2024February 12, 2024Columbia

Kavli Affiliate: Rafael Yuste | Authors: Netanel Ofer, Victor Hugo Cornejo and Rafael Yuste | Summary: Abstract The propagation of action potentials along axons is traditionally considered to be reliable, as a consequence of the high safety factor of action potential propagation. However, numerical simulations have suggested that, at high frequencies, spikes could fail to […]

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Aberrant hippocampal Ca2+ micro-waves following synapsin-dependent adeno-associated viral expression of Ca2+ indicators

Posted by dbos January 30, 2024February 12, 2024Columbia

Kavli Affiliate: Rafael Yuste | Authors: Nicola Masala, Manuel Mittag, Eleonora Ambrad Giovannetti, Darik A O’Neil, Fabian J Distler, Peter Rupprecht, Fritjof Helmchen, Rafael Yuste, Martin Fuhrmann, Heinz Beck, Michael Wenzel and Tony Kelly | Summary: Abstract Genetically encoded calcium indicators (GECIs) such as GCaMP are invaluable tools in neuroscience to monitor neuronal activity using […]

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Ptycho-endoscopy on a lensless ultrathin fiber bundle tip

Posted by dbos January 30, 2024February 12, 2024Caltech

Kavli Affiliate: Changhuei Yang | First 5 Authors: Pengming Song, Ruihai Wang, Lars Loetgering, Jia Liu, Peter Vouras | Summary: Synthetic aperture radar (SAR) utilizes an aircraft-carried antenna to emit electromagnetic pulses and detect the returning echoes. As the aircraft travels across a designated area, it synthesizes a large virtual aperture to improve image resolution. […]

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