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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Wireless Power Transfer in Space using Flexible, Lightweight, Coherent Arrays

Posted by Caltech

Kavli Affiliate: Ali Hajimiri | First 5 Authors: Alex Ayling, Austin Fikes, Oren S. Mizrahi, Ailec Wu, Raha Riazati | Summary: Space solar power (SSP), envisioned for decades as a solution for continuous, stable, and dynamically dispatchable clean energy, has seen tremendous interest and a number of experimental demonstrations in the last few years. A […]


Continue.. Wireless Power Transfer in Space using Flexible, Lightweight, Coherent Arrays

Wireless Power Transfer in Space using Flexible, Lightweight, Coherent Arrays

Posted by Caltech

Kavli Affiliate: Ali Hajimiri | First 5 Authors: Alex Ayling, Austin Fikes, Oren S. Mizrahi, Ailec Wu, Raha Riazati | Summary: Space solar power (SSP), envisioned for decades as a solution for continuous, stable, and dynamically dispatchable clean energy, has seen tremendous interest and a number of experimental demonstrations in the last few years. A […]


Continue.. Wireless Power Transfer in Space using Flexible, Lightweight, Coherent Arrays

Protocol for certifying entanglement in surface spin systems using a scanning tunneling microscope

Posted by dbos Delft

Kavli Affiliate: Sander Otte | First 5 Authors: Rik Broekhoven, Curie Lee, Soo-hyon Phark, Sander Otte, Christoph Wolf | Summary: Certifying quantum entanglement is a critical step towards realizing quantum-coherent applications of surface spin systems. In this work, we show that entanglement can be unambiguously shown in a scanning tunneling microscope (STM) with electron spin […]


Continue.. Protocol for certifying entanglement in surface spin systems using a scanning tunneling microscope