The ab initio amorphous materials database: Empowering machine learning to decode diffusivity

Posted by dbos Berkeley

Kavli Affiliate: Kristin A. Persson | First 5 Authors: Hui Zheng, Eric Sivonxay, Max Gallant, Ziyao Luo, Matthew McDermott | Summary: Amorphous materials exhibit unique properties that make them suitable for various applications in science and technology, ranging from optical and electronic devices and solid-state batteries to protective coatings. However, data-driven exploration and design of […]


Continue.. The ab initio amorphous materials database: Empowering machine learning to decode diffusivity

Exciton-phonon coupling induces new pathway for ultrafast intralayer-to-interlayer exciton transition and interlayer charge transfer in WS2-MoS2 heterostructure: a first-principles study

Posted by dbos Berkeley

Kavli Affiliate: Jeffrey B. Neaton | First 5 Authors: Yang-hao Chan, Mit H. Naik, Jonah B. Haber, Jeffrey B. Neaton, Steven G. Louie | Summary: Despite the weak, van-der-Waals interlayer coupling, photoinduced charge transfer vertically across atomically thin interfaces can occur within surprisingly fast, sub-50fs timescales. Early theoretical understanding of the charge transfer is based […]


Continue.. Exciton-phonon coupling induces new pathway for ultrafast intralayer-to-interlayer exciton transition and interlayer charge transfer in WS2-MoS2 heterostructure: a first-principles study

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

Posted by dbos Caltech

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 […]


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

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

Posted by dbos Caltech

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 […]


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

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

Posted by dbos Caltech

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 […]


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

Ptycho-endoscopy on a lensless ultrathin fiber bundle tip

Posted by dbos Caltech

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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Cell spheroid viscoelasticity is deformation-dependent

Posted by dbos Delft

Kavli Affiliate: Gijsje H. Koenderink | First 5 Authors: Ruben C. Boot, Anouk van der Net, Christos Gogou, Pranav Mehta, Dimphna H. Meijer | Summary: Tissue surface tension influences cell sorting and tissue fusion. Earlier mechanical studies suggest that multicellular spheroids actively reinforce their surface tension with applied force. Here we study this open question […]


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A compact and cost-effective laser-powered speckle visibility spectroscopy (SVS) device for measuring cerebral blood flow

Posted by dbos Caltech

Kavli Affiliate: Changhuei Yang | First 5 Authors: Yu Xi Huang, Simon Mahler, Maya Dickson, Aidin Abedi, Julian M. Tyszka | Summary: In the realm of cerebrovascular monitoring, primary metrics typically include blood pressure, which influences cerebral blood flow (CBF) and is contingent upon vessel radius. Measuring CBF non-invasively poses a persistent challenge, primarily attributed […]


Continue.. A compact and cost-effective laser-powered speckle visibility spectroscopy (SVS) device for measuring cerebral blood flow

A compact and cost-effective laser-powered speckle visibility spectroscopy (SVS) device for measuring cerebral blood flow

Posted by dbos Caltech

Kavli Affiliate: Changhuei Yang | First 5 Authors: Yu Xi Huang, Simon Mahler, Maya Dickson, Aidin Abedi, Julian M. Tyszka | Summary: In the realm of cerebrovascular monitoring, primary metrics typically include blood pressure, which influences cerebral blood flow (CBF) and is contingent upon vessel radius. Measuring CBF non-invasively poses a persistent challenge, primarily attributed […]


Continue.. A compact and cost-effective laser-powered speckle visibility spectroscopy (SVS) device for measuring cerebral blood flow

The rigidity of eigenvalues on Kähler manifolds with positive Ricci lower bound

Posted by dbos Berkeley

Kavli Affiliate: Feng Wang | First 5 Authors: Jianchun Chu, Feng Wang, Kewei Zhang, , | Summary: In this work, optimal rigidity results for eigenvalues on K"ahler manifolds with positive Ricci lower bound are established. More precisely, for those K"ahler manifolds whose first eigenvalue agrees with the Ricci lower bound, we show that the complex […]


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